328

CHALK ZONES IN THE NEIGHBOURHOOD OFSHOREHAM, BRIGHTON AND NEWHAVEN,

SUSSEX.*B y CHRISTOPHER T. A. GASTER, F.G .S.

THIS paper is a further contribution of my work on the zonesof the chalk in Sussex. My previous paper dealt with the

chalk of the Worthing District [1924 (3) p. 89, et seq .] ; th epresent one, which continues eastward of that district, embracesthe area between Shoreham and Seaford. The southernportion is coastal, extending east and west for about 15 miles andis chiefly of an urban character. It includes the towns of Brigh­ton, Hove, Shoreham and Newhaven. Owing to a westerlyinward bend of the coast the inland extension is about zt- milesat Shoreham, widen ing to 6 miles at Bishopstone, west ofSeaford. The western boundary is drained by the River Adurand the eastern by the River Ouse. The part of the SouthDowns which forms the cliff at Brighton and eastwards toNewhaven recedes from the coast west of Brighton and con­t inues inland. The Mount Caburn syncline is pr esent in thenorth of Brighton and eastwards, also the anticline of Kingstonnear Lewes, which runs approximately parallel with the lastfold [1924 (2) pp. 6, 7J. Brydone has recorded a series of foldstransverse to the cliff-line from Black Rock, Brighton, to Seaford[1914 p. 361J. These are continued westwards by an anti­cline which may be known as the Brighton anticline, of whichEast Brighton is. the axis. It is the 'westerly pitch of this foldthat accounts for the presence of the higher zones in WestBrighton (which may be seen in the railway sections betweenBrighton Station and Holland Road Halt) and finally terminatesthe outcrop of chalk on the coast in East Hove. The inliers ofCold Dean, Lower Bevendean and Balsdean recorded by th eSurvey [1924 (2) p. 40J are present in the area.

The extension of the zone of Offaster pilula to include theHagenowia horizon [1924 (3) p. 93] is fully maintained. Thiszone constitutes the greater portion of the cliff between Brightonand Newhaven and occurs in several good inland sections. Asthe lower two-thirds of the H agenowia horizon are well repre­sented, an opportunity was afforded to obtain evidence inthis portion of the horizon which was not available in th eWorthing area. As a result it was found that an additionalEchinocorys belt is present in which large forms dominate.This belt is now added to the Table recorded in the Worthingpaper [1924 (3) p. 95J, and a revision is published below.

Four specimens of Saccocoma cretacea (Bather) have beenfound in the Offaster pilula Zone. These were obtained from thesoft chalk in the tests of Echinocorys. This fossil still remains aspecial feature of the Actinocamax quadratus Zone.

• Weald Research Report NO. 9, read J uly 3th, 19'9.

ZONE OF OFFASTER PILULA.

Sub-zone. I Horizon. I Echinocorys belts. Notes on Echinocorys scutatus.

I~~ § lSchinocorys scutatus In addition to var. cincta and var. depressa this belt consists of near and

~z. var, cincta with var. small nondescript forms. No large specimens of Echinocorys have~] a.=g

J! 1'0 §~,d depressa been met with in the belt, but immediately above, in the Zone of

'~-c Ci Actinocamax quadratus, large forms reappear.

.:1 ...; ~er; ~g;

:J. ~ ~ I Large forms of Echino- Large forms dominate in this belt, but a decrease in size occurs as the;;J ~$ 6 g.='g.~ corys scutatus beds pass into the belt above. Var. cincta is occasionally found.~

~+-'~ .2'l

I-<'Vl§'" 1C'~

&~'£:.~ lSchinocorys scutatus Var, cincta decreases in numbers in the upper part of this belt. Other0

is :3'.2 ~ t; var. cincta forms occur, chiefly of moderate size..s~]~

_,£..a

"" Ci~

ff~~ I-lA d'C ...~~ 2 lSchinocorys scutatus Var, truncata is a small form which occurs chiefly in the lower part." ""::l "" o go'C vaL truncata VaL cincta is present, also forms of moderate size..0 «« - ,..,J.... .8

;;J ~.....:.

~ .. ~ &~ 8~ Echinocorys scutatus In addition to var. depressa, nondescript forms of moderate size are present."..!i 0.. III o..~ var. depressa The upper beds pass into the vaL truncata .

~E~.o c.«'"-8 -'"

~~1;'"

I,;

]~z-" . [ Echinocorys scutatus Chiefly var. tectiformis and nondescript forms of similar size.0 ...

~~ ~ a~c,~ """, var. tectiform iss 3$N

330 CHRISTOPHER T. A. GASTER,

The Trochiliopora bed [1920 p. 526J has been found in theRailway section by the entrance to Kemp Town Tunnel belowElm Grove Elementary Schools, Brighton, and also in theroadside pit! mile N.W. of Old Erringham Farm, Old Shoreham.This bed has now been traced from Beachy Head to the Eastbank of the River Adur, and is a reliable guide to the lower por­tion of the M. coranguinum zone. It appears to be includedin the upper part of the yellow nodular chalk mentioned by Rowe[1900 p. 329J·

LIST OF CHALK PITS AND SECTIONS.The area included in the paper coincides with the following

six-inch sheets of the Ordnance Survey from which the descrip­tion of the exposures recorded have been prepared:-

Sussex (East and West) Sheet LXV. N.W. N.E.Sussex (East) Sheet LXVI. N.W. N.E. S.W.

S.E.Sussex (East) Sheet LXVII. N.W. N.E. S.W.

S.E.Sussex (East) Sheet LXXVII. N.E.Sussex (East) Sheet LXXVIII N .W. N .E.Against each exposure a reference is given to the sheet on

which it is included. Each exposure is arranged under thehorizon in which it occurs, cross references being used wheremore than one zone is present.

The occurrence of Conulus albogalerus in the upper portionof the Micraster coranguinum zone is recorded against the sectionsfrom which it has been obtained.

The numbers of the pits and sections continue on fromthose given in my last paper [1924 (3)J, and are shown on Plate 27.

In the case of the cliff sections the numbers indicate theportion included on the quarter sheet or sheets against whichsuch numbers are attached.

ZONE OF SCHLOENBACHIA VARIANS.PIT No.

92. Small pit by foot path on Downs, i of a mile S.W. of St. PancrasChurch, Kingston, near Lewes. Scaphites common .. 67 N.W.

93. Bank of high road about one furlong south of Spring Barn,East of Kingston, near Lewes. .. .. 67 N.W.

94. Bank of high road, North of Brook Lane and eastward onRanscombe Hill, S.E. of Lewes. .. 67 N.W.

r r S, Quarry known as Balcombe pit, at Chalk Works, S.E. of theRailway Station, Glynde. Banks of tramway from main railwayline near centre of pit. (See H. subglobosus zone). .. 67 N.E.

127. New chalk works at Asham House, Beddingham. A section inmeadow on west side of high road about 150 yards N.W. ofentrance to main works yielded Turrilites costatus Lmk. (Seealso zones of Holaster subglobosus and Inoceramus labiatits)

67 N.E.

CHALK ZONES OF SHOREHAM, BRIGHTON AND NEWHAVEN. 331

ZONE OF HOLASTER SUBGLOBOSUS.

91. Small quarry opening on the Hollow Lane above the roo-footcontour, S.E. of Hollow Barn, Kingston, near Lewes, Dip north.

67 N.W.92. Upper section by footpath on Downs l of a mile S.W. of St.

Pancras Church, Kingston, near Lewes. See S. varians zone.67 N.W.

:II6. Small pit by cart track, North of Ranscombe Farm and E. ofRanscombe Holt, just reaching zoo-foot contour on map. DipNorth. . . . . . . . . . . . . . . 67 N.E.

a r S Quarry at the Chalk Works, south-east of the Railway Station,Glynde (known as Balcombe Pit). Chalk above main floor ofpit. Bed at highest point in quarry (roo-foot contour- on Eastside) contains large A mmonites and is identified with Bed 7of the Survey (1903, p. 41). Beds almost horizontal. Seealso S. varians zone. 67 N.E.

1127. New Chalk Works, Asham House, Beddingham. A shaft hasbeen sunk to a depth of 176 feet, the chalk thrown out, indicatedbesides the zone of S. varians, chalk of the H. subglobosus zone,including the Belemnite Marls and some 50 feet of the Inoceramuslabiatus zone including the Melbourn Rock. The top of theH. subglobusus zone occurs at about the zoo-foot contour,Belemnite marls being exposed in top of Upper section on Northside of Works 67 N.E.

'I26. Small pit in lane 300 yards south of The Lay, Beddingham, bycart track to Coombe Barn and 700 yards NoE. of Asham HouseCement \Vorks. 67 N.E.

122. Roadside cutting in lane ascending Downs, 1 mile south ofNewelm, West Fide. 67 N.E.

123. Roadside cutting in lane leading up to Beddingham Hill, neartank t of a mile south of Little Dene. 67 N.E.

SUB-ZONE OF ACTINOCAMAX PLENUS.The Belemnite Mads which occur at or just above the 200­

foot contour in the Beddingham area were seen in the followingexposures :-

127. New Chalk Works, Asham House, Beddingham, a good exposureon North side of works above referred to, and specimens of A.plenus obtained from material thrown out for shaft .. 67 N.E.

"Izza. Small pit in Fide Bostal, 500 yards south of Newelm, WestFide. 67 N.E.

0l23a. Small overgrown pit on east side of lane leading up to Bedding-ham Hill, t mile south of Preston Court and Little Dene. 67 N.E.

ZONE OF INOCERAMUS LABIATUS or RHYNCHONELLACUVIERI.

67. Railway cutting due south of Cold Dean, North Moulsecoombe,North-east of Brighton (Cold Dean inlier), Rhyncbonella cuvierid'Orbfound with Discoidea dixoni, Forbes, probably indicatingthis zone to be present. See also zone of Terebratulina lata.

66 N.W.90. Bank of ]uggs's Road. east of Kingston Hollow and Hollow

Barn, Kingston, near Lewes, 120 yards North of Kingston Hollowpit. Melbourn Rock. 67 N.W.

95· Chalk pit at zoo-foot contour in Swanborough Drove, W.S.W.of Swanborough Farm and t mile west of main road, Iford, Mel­bourn Rock present (I. labiatus and R. cuvieri, common).

67 N.W.

332 CHRISTOPHER T. A. GASTER,

ZONE OF TEREBRATULINA LATA.Railway cutting due south of Cold Dean, North Moulsecoombe.

North-East of Brighton (Cold Dean inlier) Camerospongia capitata,T. Smith, Terebratula semiglobosa, Sow., and Ostrea vesicularis(Lmk.) obtained. Both zones of the middle chalk are probablypresent in this cutting. See also Inoceramus labiatus zone. 66 N.\V.

Bank of cart track (at lower end) running northward from theLewes Road, t mile W.S.W. of Cold Dean (Cold Deaninlier) ., 66 N.W.

Top of zone at base of pit 150 yards S.E. of Lower BevendeanFarm, t mile N.W. of Heath Hill Farm. (Lower Bevendeaninlier.) See also H. planus zone .. 66 N.E.

Small pits and cuttings south of Balsdean Farm, Rottingdean(just below 300-foot contour). (Balsdean inlier) .. 66 N.E.

Small pit Norton Farm, on north side, North of Balsdean Farm,at about same level. (Balsdean inlier) .. 66 N.E.

Pit on Hard Hill at 300-foot contour, i of a mile S.W. of mainroad at Hard Vicarage .. 67 N.\V.

Pit S.W. of Northease Farm at zoo-foot contour, ! mile westof Abergavenny Arms, Rodmell ., 67 N.\V.

Main road cuttings and two pits by the cross roads N.W. ofSouthease Church with chalk of Inoceramus labiatus zonebelow. . .. 67 S.W.

Roadside pit at Baydean, 3! furlongs south of Itford Farm,Beddingham, Top beds of zone exposed in pit .. 67 S.'V.

Caburn Pit, east side of Mount Caburn Camp, ! of a mile westof Glynde Village. Dip North. See also I. labiatus and Holasterplanus zones .. 67 W.E.

Small pit by cart track about! of a mile S.S.E. of Little Dene,Beddingham, and t of a mile W.N.W. of Firle chalk pit. Justbelow 4oo-foot contour .. 67 N.E.

Top of zone in base of Firle Chalk pit, 'Vest Firle, and in roadcuttings immediately below. (See also Holaster planus zone.)

67 N.E.

Chalk pit by site of Windmill, S.S.W. of Abergavenny Arms,Rodmell, just above roo-foot contour. Melbourn Rock exposed.Pockets of clay-with-flints seen .. 67 S.W.

Upper part of zone with Terebratulina zone above, exposed inmain road cuttings and two pits by the cross roads, N.W. ofSouthease Church .. 67 S.W.

Bank of cart track above Ranscombe Holt, i mile west ofMount Caburn Camp, Melbourn Rock . . 67 N.E.

Ranscombe Holt is probably the site of the Ranscombe quarrydescribed by Prof. C. Barrois (1876, p. 30). If this is the case,the pit showed chalk of the H. subglobosus zone with perhapssome varians chalk at the base.

Tramway cutting at entrance to Caburn Pit, east side of MountCaburn Camp. Melbourn Rock exposed 67 N.E.

Roadside cuttings in Firle Bostal t of a mile south of Newelm,West Firle, just above the zoo-foot contour. Melbourn Rockexposed 67 N.E.

New Chalk Works, Asham House, Beddingham. See H.subglobosus zone 67 N.E.

Small roadside pit and cuttings in lane to Beddingham Hill,! mile south of Little Dene and Preston Court, just above 200­foot contour. Melbourn Rock exposed .. 67 N.E.

Higher chalk in zone, pit t of a mile S.E. of last-mentionedpit by Parish boundary, Beddingham, above 250-foot contour

67 N.E.

81.

8z.

96.

97·

99·

79·

98.

66.

99·

r azb.

1 2 4.

121.

100.

127.

l23b .

66 .

79·

83·

121.

128.

CHALK ZONES OF SHOREHAM, BRIGHTON A:SD NEWHAVE N. 333

ZO NE OF H OLASTER PLA N US.

Cutting in bank of cart track running nor thwards from the­Lewes Road, t mil e W .S.W. of Cold Dean (Cold Dean inli er).See al so zon e of T erebraiuli na lata .• 66 N .\V.

Small pit at zoo-foot contour at west end of W estlain Belt,sout h of Railwa y and 500 yards S.\V. of Falmer Pumpin g Station(Bri ghton Corporation W ater works). . , 66 N .E .

Pit 150 y ards S.E. of Lower Bevendean F arm, t mil e N.W . ofH eath Hill F arm. (See also T erebratulina zone) ., 66 N .E.

Bank of ca rt t rack , north side of Standean Bottom, west ofBalsd ean Farm, Rottingdean. . . 66 N .E.

Caburn Pit, i of a mile N .W . of Glynde Ra ilway Station . D ipNorth. See also T erebraiul ina zon e . .. 67 N .E .

Bank of cart t rack i of a mile S.S.E. of Little Den e,Beddingham, above sma ll pit near 4oo-foot contour in T'erebratu-lina zone 67 N.E.

Firle Chalk pit, West Firle, 400-foot contour. See also Tere-bratulina zone. . . 67 N .E .

Pit, t of a mile N .W . of Red Lion Pond, Ltford Hill, Beddingbam,just below 4oo-foot con tour . ., 67 S.E .

ZONE OF MICRASTER COR T E S T UDI N A R I UM.

101. Roadside pit, east of Durham F arm, ! mile N .E. of TarringN eville Village. Clay with flints abov e chalk . . . 67 S.W.

119. Chalk pit a t t op of Fi rle P la ntat ion, West Firle, sao-foot con-t our . . 67 N .E .

120. Bank of road t mile S.E. of F irle Chalk pit, W est F irle, a t about500-f oot contour. ., 67 N.E.

125a . Bank of ca rt track. south of p it No. 124, We st of F irle, Cha lkpit at about s oo-foot conto ur. .. 67 N .E .

37·

38.

51.

70 •

72 •

ZO NE OF M IC RA S TER CORANGUINUM .

Roadside pit, east side of the Adur, ! mile N. W. of Old E rr ing­h am Farm, Old Shoreh am. T rochiliopora bed present. 65 N.\V.

Higher beds in road sid e p it, 200 y ards south-west of Old Erring-h am F arm, Old Shoreham . . . 65 N .\V .

Northe rn portion of Dyke R ail way cut t ing, west of Round Hill,in t op b eds of zone, Micraster corangui num found . D ip Sout h .See also Uintacrinus sub -zone. . . ., 65 N .E.

Bank and section above a nd b elow upper part of road on Cor­pora t ion Property at Abattoir, eas t of Ditchl ing road, Brighton.Up per part of zone, pink-rind flints present (Conul us albogaleru sfound 66 N .W .

R ailway cutting adjoining Brighton Ab attoir to ea st side oftunnel, east of Lon don Road St at ion . 'Westerly d ip of st ra taclearly seen her e. Conulus albogalerus present. . . 66 N .\V .

R ailway cutting in lower part of zone, W est of BonchurchR oad, north of Kemp Town T unnel below Elm Grove Schoo ls,Brighton. Short post by tunnel marked .. Le vel 214 feet."Trochiliopora bed present. D ip South. . . 66 S.W.

Temporary section on site for Nurses Home on west sid e ofInfirmaries at Brighton W orkhouse. Conulus albogalerus andpink-rind flints present, barrel shaped stem of B ourgueticrinus.obtained. . . . . . . . . . . . . . . 66 S.W.

Sections at Kemp t own R ailwa y Station. Strong flint seam att op of mouth of tunnel marking upper limit of zone. See alsoUintacrinus and May sup ites su b-zones. Dip South. . • 66 S.W .

334 CHRISTOPHER T. A. GASTER,

78. Small pit. 150 yards south of New Barn, t of a mile north ofNewmarket Plantation, Falmer. Above zoo-foot contour. DipNorth. .. 66 N.E.

88. Small pit 3 furlongs east of High Barn, High Hill, Rottingdean.Pink-rind flints present. .. 66 S.E.

[I I. Chalk pit by cart track on south side at Pickershill Farm,It miles N.\V. of Telscombe Church. Above zoo-foot contour.Pinkish flints present. Micraster coranguinum obtained. 67 S.W.

104. Chalk pit by foot path about t of a mile east of Halcombe Farm,Piddinghoe. Conulus albogalerus present in pit. Specimen ofH agenowia rostrata, Forbes, obtained. See also Uintacrinussub-zone. 67 S.W

[03. By-road pit 1 of a mile South of Deans, S.W. of Chapel Barnand! mile North-West of Piddinghoe Church. .. .. 67 S.W.

102. Pit at entrance to Deans, t mile N.W. of Piddinghoe Village.Abundant fragments of Inoceramus in pit which is in lower partof zone. .. 67 S.W.

1105. Disused quarry, high in zone, on west side of high road 1 of amile N.W. of Piddinghoe Church. .. 67 S.W.

106. Pit on west side of high road in field adjacent to previous piton south side 1 of a mile W.N.W. of Piddinghoe Church. Conulusalbogalerus found in lower part of pit. Micraster coranguinumalso obtained. .. 67 S.W.

][29. Bank on east side of high road south of pond at Tarring Neville,300 yards south of Church, in lower part of zone. .. 67 S.E.

130. South-east of last section on same side of road and 350 yardssouth of Tarring Neville Church is a pit in higher beds of zone.

67 S.E.[31. Upper beds of zone exposed in cement works quarry, South

Heighton. .. 67 S.E.[32. Pit in Denton Village, 150 yards S.s.E. of Church. Conditions

prevented examination of pit, but Dr. Elsden reports Conulusalbogalerus present. (1909 p. 446.) .. 78 N.E.

50.

51.

58.

72 .

75·

ZONE OF MARsUPITEs TEST UDINARI US.SUB·ZONE OF UINTACRINUS.

Chalk pit at Old Shoreham Pumping Station (Brighton Corpora­tion Waterworks) North of Mill Hill, Old Shoreham. .. 65 N.W.

Small pit by cart track to Atlingworth Barn about 700 yardsNorth of New Barn and the same distance N.E. of New England,Portslade. (I furlong due East of pit No. 47, in truncata beltO. pilula zone.) .. 65 N.E.

Similar pit by cart track t of a mile east of last pit on east sideof Benfield Hill, Hangleton, at about 250-foot contour... 65 N.E.

South end of railway cutting (Dyke Branch) west of Round Hill,N.E. of Northlane Barn, Hangleton. (See also zone of M. coran­guinum.) .. 65 N.E.

Railway cutting (west side) just south of Bridge from StationRoad to Withdean Road, North of Preston Park Station, about20 feet of sub-zone exposed by Bridge. Dip South, bringing inwhole of Marsupites sub-zone in lower part of cutting, followedby sub-zone of E. scutatus var. depressa by footbridge just northof signal box, north of Station-a distance of about! mile. 66 N.W.

Railway quarry at Kemp Town Station, whole of sub-zone ex­posed (about 50 feet). Dip South. See also zone of M. coran­guinum and Marsupites sub-zone. .. 66 S.W.

Cliff and fore-shore, east of Brighton, at Black Rock, and east­ward as defined by Mr. R. M. Brydone (1915, pp. 12-15). 66 S.W.

& 66 S.E.

CHALK ZONES OF SHOREHAM, BRIGHTON AND NEWHAVEN. 335

1°4·

1°7·

133·

40 .

49·

58a .

71a .

7"-.

73·

7S·

II3·

1°7a.

133 A.

Chalk pit on east side of Sheepcote Valley by Rifle ranges, II

furlong N.E. of Rifle Butt Cottage, Ovingdean.. . .. 66 S.E.Upper part of pit about half a mile East of Halcombe Farm,Piddinghoe. See zone of M. coranguinum 67 S.\\'.Pit, S.S.W. of Courthope Farm and 500 yards S.W. of Piddinghoe

Church. .. 67 S.W.Chalk pit on east side of Beresford Road, Denton, 150 yards.

east of Denton Corner and about! mile N.E. of Newhaven TownRailway Station. .. 78 N.E.NOTE.-The upper limit of the Uintacrinus band was identifiedat Withdean and Kemp Town Railway Station (Nos. S8 and 72)agreeing in each case with the division fixed by Brydone (1915pp. 13-14). Brydone states that his Bed 2, which is the uppErtwo feet of the Uintacrinus band, appears to be quite devoid ofcrinoid remains. At Withdean not only were two Uintacrinusplates obtained in the thick flint seam at the base of this 2 feet,but also a plate was found 6 inches below the top of the sub-zone,showing that this Bed was correctly assigned to the Uintacrinusband.

SUB·ZONE OF MilRSUPITES TESTUDINARIUS.

Pit, west of Mill Hill, 1 of a mile N.N.E. of Old Shoreham Churchand! mile south of Old Shoreham Pumping Station... 6S N.'\'.

Pit by cart track to Atlingworth Barn about soo yards N.E. ofNew England, ISO yards due east of Roadside Pond, i of a milenorth of Hove Sanitorium, Portslade. .. .. 65 N.E.

Railway cutting between south of Bridge from Station Road toWithdean Road and signal box north of Preston Park RailwayStation. (See also sub-zone of Uintacrinus and sub-zone of E.scutatus var. depressa.) .. 66 N.W.

Chalk from excavations in January, 1929, on North side ofWhite Hawk (Neolithic) Camp, south of Brighton Race Stand,just below 400-foot contour yielding Marsupites plates with strongornamentation. .. 66 S.W.

Kemp Town Railway Station section. In upper part abovetunnel about 10 to IS feet of lowest beds of sub-zone exposed,chalk dipping south bringing these beds down to the extreme'south end of section below east side of Freshfield Road, Brighton.(See also zone of M. coranguinum and sub- zone of Uintacrinus.)

66 S.W.Cuttings at north-west end of vacant piece of land, north of

and adjoining Blind School, Bristol Gate, Kemp Town, Brighton.Top of sub-zone indicated. .. 66 S.W.

Cliff section, east of Brighton at Black Rock to Roedean, fora detailed description, see Brydone (191S pp. 12·IS). 66 S.W. &

66 S.E.Foreshore, Saltdean. (As defined by Mr. R. M. Brydone, 1914

p. 360.) .. 77 N.E.Base of cliff and Foreshore, Friars Bay, west of Newhaven.

(Idem. pp. 360-361.) .. 78 N.W.Overgrown chalk pit about 3So yardsS.S.W. of Courthope Farm

S.W. of Piddinghoe Church, on south side of and above pit No.107 in Uintacrinus sub-zone. Marsupites plates in chalk belowturf at top of pit, indicating upper part of sub-zone. .. 67 S.'V.

& 78 N.W..Meeching quarry, Newhaven, upper beds of zone represented

in lower part of quarry, plates common. (See also sub-zone ofE. scutatus var. depressa.) .. 78 N.E.

Bank of roadside, East of Foxhole Cottages, about !-mile SSE.of Pit No. 133, Denton, yielded plates of Marsupites 78 N.E ..

74·

:80.

89·

CHRISTOPHER T. A. GASTER,

ZONE OF OFFASTER PILULA.(a) SUB-ZONE OF ECHINOCORYS SCUTATUS var, DEPRESSA.

58b. Railway section by footbridge about 75 yards north of Signalbox, North of Preston Park Station. (See also both sub-zones ofMarsupites zone.) .. .. 66 N.W.

Bank of road and chalk pit at top, Bristol Gate, ! mile S.W. ofManor House and Farm, Kemp Town, Brighton. .. 66 S.W.

A small temporary section on private ground East side of VernonAvenue about 400 yards N.E. of site of Warren Farm Schools'Well, yielded Ostrea boucheroni, Coq. Thecidia Wetherelli, Morris(Large) and Pelmatopora marsupitum, Lang, indicating chalk notmore than about 15 feet above the base of the sub-zone. Similarchalk is present in the cliff due south at Roedean. The deter­mination of the horizon of this temporary section agrees favourablywith the 460 feet of "Chalk-with-flints" assigned to the wellsection (1900 p. 117) and on signed plan of well exhibited in theBrighton Museum. The 418 feet quoted (1878 p. 116 and 1899p. 83) is the depth at which the first contractor finished.

Warren Farm Schools is in the Parish of Rottingdean andis situate about It miles N.E. of the Grand Stand of BrightonRacecourse and 11 miles from the coast and due north of RoedeanSchool. Some previous records have incorrectly placed theSchools Well in Telscombe Parish (1878 pp. 115-117 and 1899p. 83 and p. 119). This would explain a descrepancy pointedout in a note by Mr. H. J. Osborne White (1924 (2) p. 42). 66 N.E.

85. Chalk cliff, East of Brighton to Rottingdean.. . . . *66 S.E.113. Chalk Cliff, Rottingdean to Lower Bannings, east of Saltdean

Cottages. . . *77 N.E.Chalk Cliff, Lower Bannings, east of Saltdean Cottages to Old

Nore Point. . . *78 N.W'"As defined by Mr. R. M. Brydone, 1914 pp. 359-363. See also Mr. H. J

Osborne White (1924 (2) pp. 56-58).Chalk pit, 300 yards S.E. of Newlands Barn, Rottingdean, at

zoo-foot contour. (1928 pp. 200-201). .. 66 S.E.Upper part of Meeching Quarry. (See also zone of Marsupites.)

78 N.E.Farmyard section N.E. of Manor House, Bishopstone. 78 N.E.Small pit, about 150 yards N.E. of last named section, one

furlong N.E. of Manor House, Bishopstone. .. .. 78 N.E.Roadside pit, about! mile east of Bishopstone Railway Station,

upper beds of sub-zone, depressa and truncata belts. (See alsosub-zone of E. scutatus var. cincta.) .. 78 N.E.

(b) SUB-ZONE OF ECHINOCORYS SCUTATUS var. CINCTA.

(I) H or i z 0 n 0 f a bun dan tOil as t e r Pi lu I a.

45. Roadside pit 150 yards south of Portslade Paddocks, ! mileNorth of Industrial School, Portslade. (Cincta found). 65 N.E.

47. Small pit t of a mile north-east of New England, about 300 yardsnorth of roadside pond. 1 mile N.E. of Mile Oak Waterworks, Port­slade. (Truncata belt.) .. 65 N.E.

52. Cutting in bank of field, 100 yards north of Hangleton Church.65 N.E.

59. Road bank at top and west of Woodside Avenue, north ofPreston Park Railway Station, just above zoo-foot contour.(Cincta belt.') .. 66 N.W.

62. Lower beds of Railway cutting by tunnel west of Locomo-tiveShops below top of Millers Road, Preston (0. pilula found). 66 N.W.

CHALK ZONES OF SHOREHAM, BRIGHTON AND NEWHAVEN. 337

86.

77·

.112.

62a.

I36.

140 .

Small sections on east side of main line, south-east of last sectionand I furlong north of Dyke Road Drive Bridge. (Large O.pilula found indicating top of sub-zone.). . .. 66 N.W.

Small pit in field near road about t of a mile south of FalmerChurch. .. 66 N.E.

Chalk pit 120 yards west of Ovingdean Church. (Cincta belt).66 S.E.

87. Pit by cart track to Newlands Barn, north end of East Hill,700 yards E.N.E. of Rottingdean Church. (Cincta belt) (19z8pp. ZOO-20L) .. 66 S.E.

Section by main road below Kattiwake Hotel, west of SaltdeanBottom (1928 p. 200) (Cincta belt). .. 77 N.E.t Chalk cliff, east of Brighton at Roedean to Rottingdean. 66 S.E.t Chalk Cliff, Rottingdean to east of Saltdean Cottages. 77 N.E.t Chalk Cliff, Lower Bannings to Old Nore Point. •. 78 N.W.t Chalk Cliff, Old Nore Point to Inn on west side of entrance toNewhaven Harbour, horizon also re-appears above beach level atBuckle Inn, West of Seaford. 78 N.E.

t (As defined by Mr. R. M. Brydone (1914 pp. 364-365 and Mr. H. J. OsborneWhite 19z4 (2) pp. 56-58)).

Pit by New Barn, S.W. of Meeching Quarry, Newhaven, (CinctaBelt) 78 N.E.

Pit, ! mile east of Bishopstone Railway Station, upper part ofpit (Truncata belt). 78 N.E.

43·

4 6.

55·

53·

5+

60.63·

69·

lIO.

(Z) H 0 r i z Q n 0 f Hag e now i a r 0 s t ra t a.Buckingham Barn Pit, Old Shoreham and small cuttings a few

yards north of pit. (Large Ecbinocorys.i .. 65 N.W.Chalk pit, south of Kingston New Barn, ! mile North of SteyningUnion Workhouse Infirmary, Old Shoreham. (Large Echinocorys.)

65 N.W.Chalk pit, 300 yards south of Southwickhill Barn, Southwick.

(Large Echinocorys with belt of small forms in upper part.) 65 N.W.Small pit ! mile south of New England, 3 furlongs east of Port-

slade Paddocks. .. 65 N.E.Dyke Railway Section, north side of Bridge about! mile S.E. of

Hangleton Church. (Top cincta belt) (See also A. quadratus zone.)65 N.E.

Cutting on Downs about 70 yards west of boundary hedge, and! mile N.E. of Hangleton Church, (Top cincta belt.) 65 N.E.

Overgrown pit, S.E. of last section, I furlong north of site ofRoman villa, 3 furlongs N.W. of West Blatchington Church.

65 N.E.Bank on west side at lower end of Millers Road, Preston. 66 N.W.Railway section for nearly t mile on west side from below

Stanford Road at east of Upper Hamilton Road, just north ofRailway Shops, to tunnel below top of Millers Road, Preston.Chiefly in belt of large Eckinocorys, but the upper (Cincta) belt ispresent and accessible at south end of section. Beds almosthorizontal. See also horizon of abundant O. pilula. .. 66 N.W.

Railway section on north-west side at Brighton Station belowHoward Place, south end with large Echinocorys in lowest part andupper (Cincta) belt above, dip bringing within reach the upperpelt at north west end; about 30 feet of sub-zone in section withbeds of A. quadratus zone above. .. 66 S.W.

Bank of main road in highest part between Rottingdean andSaltdean Bottom. .. .. 77 N.E.

Pit by main road, I furlong S.E. of Lower Bannings, East ofSaltdean. (Large Echinocorys.) •• .. 78 N.W.

CHRISTOPHER T. A. GASTER,

139.

108.

137·

138.

Chalk Cliff in upper part, between Lower Bannings and OldNore Point. (See alsoA. quadratus zone for highest chalk.) 78 N.W.

Chalk pit on east side of Hoddern Farm, Piddinghoe. (LargeEchinocorys.) Loose green coated flints in clay above... 78 N.Vv'.

Roadside pit, north of Newhaven Union Workhouse. (LargeEchinocorys.) .. 78 N.E.

Chalk Cliff between Old Nore Point and Inn on west side Ofentrance to Newhaven Harbour. The lower beds of this horizonare accessible in almost the whole of this section and the upperbelt is accessible below the Tertiary beds at Castle Hill. (SeeMr. R. M. Brydone, 1914 PP' 365-366.) Approximately thelowest So to 60 feet of the chalk which he refers to the zone ofA ctinocamax quadratus is now included in the Offaster pilula zone asthe Hagenowia horizon. (1924 (3) p. 93). ., 78 RE.

Railway section, south of Hawth Hill between bridge over high.road, N.W. of Buckle Inn and north of Blatchington CoastguardStation, west of Seaford. (Large Echinocorys belt.) ., 78 N.E.

Section, north of road near Buckle Inn and Blatchington Coast­guard Station, south of No. 137. Whole of section about t milein belt of large Echinocorys. 78 N.E.

ZONE OF A CTINOCA MAX QUADRATUS.SACCOCOMA SUB·ZONE.

44. ChalkpitbyMileOakRoad, about t of a mile N.E.ofWindmillInn, Southwick, 1 furlong north of Upper Shoreham Road. 65 N.E.

56. Knold's chalk pit (Brighton Corporation Waterworks) on Northside of Old Shoreham Road, North of Portslade Railway Station.

65 N.E.55. Railway cutting on Dyke Branch by Bridge, t mile S.E. of

Hangleton Church. Junction with top beds of Offaster piluta:zone seen here. (See Hagenowia horizon.) ., 65 N.E.

57. Small roadside pit and bank 1 furlong E.N.E. of West Blatching-ton Church. Actinocamax quadratus obtained.. . ., 65 N.E.

61. Cliftonville Spur railway cutting, east of Upper Drive, adjoininggrounds of Convent of the Sacred Heart and Brighton GrammarSchool Playing Field, Hove. .. 66 N.W.

68. Railway cutting below Addison Road on north side, east ofHolland Road Halt, Hove. 66 S.W.

6g. Railway section in upper part below Howard Place, BrightonStation, accessible above talus at north-west end. (See alsoHagenowia horizon O. pilula zone.) .. 66 S.W.

109. Chalk pit south of main road, east of Bolney Avenue, Peacehaven,t of a mile south of Lower Hoddern. .. 78 N .\V.

II4. Cliff in highest parts between Telscombe Cliffs and Old NorePoint, greatest thickness probably at Peacehaven and highestpoint east of Friars Bay. It includes the upper 42 feet of theSection recorded by Mr. R. M. Brydone for this zone in the Sussexcliffs. (1914 p. 366.} .. 78 N.W.

I wish to tender my thanks to the Southern Railway Companyfor allowing me every facility to examine their cuttings in theneighbourhood of Brighton.

My thanks are also due to the various quarry owners andothers who have readily given me every opportunity to visitthe pits on their property.

Finally my sincere thanks are also tendered to Dr. F. L. Spathand Mr. T. H. Withers, who gave me information and opinions,and to my wife for her valuable help in the field.

CHALK ZONES OF SHOREHAM, BRIGHTON AND NEWHAVEN. 339

TABLE OF FOSSILS.It is not possible to continue the arrangement of tabulation

of the fossils as provided in the table for the Worthing District[1924 (3)J owing to the greater number of pits recorded. Theoccurrences of the fossils are indicated in two groups:-

(I) The zonal or characteristic species, by the letter Z,including those not confined to, but a special feature ofthe horizon.

(2) The remainder by an X.Additional notes will be found in column 16 of the Table.The lists for the zones of Ofjaster pilula and Actinocamax

quadratus should be compared' with those for the WorthingDistrict.

In the case of the Cribimorph Polyzoa the species markedwith an asterisk-*-indicate that the type specimens werecollected from the area. (See W. D. Lang, 1921 and 1922.)

In connection with the Cretaceous Asteroidea, attention isdrawn to the Table of Zonal Records by W. K. Spencer (1914pp. 168-169).

REFERENCES.

1900.

1900.

1901.

1902.

:1906.

1908.

1909.

Paoc,

BARROIS, C.-Recherches sur Ie Terrain Cretace Superieur der Angleterre et de l'Irlande. Mem. Soc. Geoi. Nord, 4-to Lille.

DIXON, F.-" The Geology of Sussex," znd Edition. Edited byProf. T. R. Jones, 4-to Brighton, Geol. Map, 65 plates.

WHITAKER, WM., and REID, CLEMENT.-" The Water Supply ofSussex." Mem. cea. SUYv., p. 83 and p. Il9. Warren FarmWell, Rottingdean, near Brighton.

JUKES-BROWNE, A. J .-" The Cretaceous Rocks of Britain."(Mem. Geol, Surv.) Vol. I, The Gault and Upper Greensand ofEngland, p. II 7. Warren Farm Well, Rottingdean.

ROWE, A. W.-" The Zones of the White Chalk of the EnglishCoast." Part I, Kent and Sussex with appendices by J. W.Gregory and F. L. Kitchin. The Cliff Sections by C. D. Sher­born. Proc, Geol, Assoc., vol, xvi.. pp. 289-368, plates viii.-x.

JOHNSON, J. P.-" Some sections in the Cretaceous rocks aroundGlynde and their fossil contents." Geol . Mag. 249-251.

MCPHERSON, W.-" Zones of the Chalk near Brighton." Svo,Brighton pp. 1-24.

JUKES-BROWNE, A. J.-" The Cretaceous Rocks of Britain," vol.ii, The Lower and Middle Chalk of England, with contributionsby W. Hill, Mem. Geol, SUYv. The Lower chalk in Sussex,pp. 64-78. The Middle chalk in Sussex, pp. 396-407.

JUKES-BROWNE, A. J .-" The Cretaceous Rocks of Britain," vol,iii. The Upper chalk of England, with contributions by W.Hill, Mem, Geol, Surv. The Upper chalk in Sussex, pp. 28-56.

DIBLEY, G. E.-" Excursion to Lewes." Proc. Geol, Assoc., vol,xjx,; pp. 451-452.

DOUGLAS, J. A.-" A Note on some new Chalk Crinoids" (genusRoveacrinus). Ceol. Mag., pp. 357-359. PI. xvii.

ELSDEN, J. V.-" Geology of the neighbourhood of Seaford, Sussex."Quart. Journ. Geol . Soc., vol. lxv., pp. 442-461.

SPENCER, W. K.-" The Evolution of the Cretaceous Asteroidea."Phil. Trans. Royal ss«, Series B., vol. 204, pp. 99-177.

GEOL. Assoc., VOL. XL., PART 4, 1929. 23

340 CHALK ZONES OF SHOREHAM, BRIGHTON AND NEWHAVEN.

1915.

1920.

19 21.

192 5.

1926•

1928.

1929·

BRYDONE, R. M.-" The Zone of Offaster pilula in the SouthEnglish Chalk." Ceol. Mag., pp. 359-369.

BRYDONE, R. M.-" The Marsupites Chalk of Brighton." Geol,Mag., pp. 12-15.

GASTER, C. T. A.-" An undescribed Species of Trochiliopora.Ceol. Mag., p. 526.

LANG, W. D.-Brit. Mus. Cat. Cret. Bryozoa, vol. iii. "TheCribrirnorphs," part I.

Op, cit. vol. iv., "The Cribrirnorphs," part II.(I) BATHER, F. A.-On Saccocorna cretacea n. sp. A Senonian

Crinoid. Proc, Geol, Assoc., vol. xxxv. pp. 111-12I.(2) WHITE, H. J..OSBORNE.-" Geology of the Country near

Brighton and Worthing." Mem, Geol, Suru.(3) GASTER, C. T. A.-" The Chalk of the Worthing District,

Sussex." Proc, Geol, Assoc., vol. xxxv., pp. 89-110.GASTER, C. T. A.-" Excursion to the Worthing District, Sussex."

Proc, Geol, Assoc, vol. xxxvi., pp. 99-102.\VHITE, H. J. OSBORNE.-" Geology of the Country near Lewes."

Mem, Geol, Suro,GASTER, C. T. A.-" Excursion to Newhaven and Brighton."

Proc, Geol, Assoc., vol. xxxix., pp. 198.201.GASTER, C. T. A.-" Geological Excursion." The South-eastern

Naturalist and Antiquary, vol. xxxiv., pp. Ivii.vlviii.

S pecies.

Lowercha lkzones.

Middlecha lkzones .

Uppe r chalk zones.

Marsupites Itestudinarf ns.

Remarks.

I

FORA~llNIFERA .

Cristcllaria roiulata Lmk .Lituola nau tiloides Defr .Webbina sp .

Sl'Ol\7G L£.Cumerosp ongia capitata T . Smit hCliona cretacea P rot l.Pharetrospongia stlaha n i Sa llasPl inthosell a compacta Hinde- - - ---' quamosa ZittP orosphcera arrecta Hinde- --- -- globul aris (P hi Jl)- - - -- lamella ta B rvdone- - - -- nucijormis v. H ag .- - - - - patellif orm is H inde--- -- pileolu s Lmk.- - --- pustul osa Brydone------ sessilis B rydone- ---- tceniif ormis BrydoneTalpina ra mosa H ag.Talpin a sp .Verrucoccelia tub ulata T . Smi t hVentriculites radi atus Mant.- ---- -convolutus H in de---- - - sp .P orochonia simplex Smit h

ANTHOZOA .A xogaster cretacea Lonsdal eEpiphaxum aulo porides LonsdaleM icrabacia coronu la Goldf.P arasmilia centrali s (Ma n t .)--- -- cf M antelli. M.E. & H.St ephanopbyllia B owerbanki M.E. & H.Coelosmilia laxa M.E . & H .

H YDROZOA .Retisp inopora arbusculum. Brydone

lancingensis Gaster- - - - - - p atula Bryd oneSpinopora dixoni Lonsd.

x

x

3 4 5

z

X

X

6

X

X

X

7

X

X

X

X

8

xX

xX

x

X

x

x

X

x

x

X

x

xX

X

X

x

X

X

xX

X

XX

XXXXX

X

X

X

x

x

xXXXXX

XXX

X

X

XX

XX

X

XXXXX

X

X

XX

X

XX

X

x

X

XXXXXX

XXXX

XX

XX

X

z

1 5

XXX

X

X

X

XXXX

X

Z

x

16

Col. 14 com mon on Echinocorysin lower belt

Pit No. 118

Pit No. 118

- _._ - ---

E CHINODERl\-iATA.

CRINOIDEA.B ourgueti crinus

Form 1 Bryd on eForm 2 Bryd oneF orm 3 Brydone

- - - - - - Form 4 Br vdoneForm 5 B rydone

Form 6 Bryd on eForm 7 Brydonebarrel shaped oss ic1es

I socrinus sp .M arsupites tesiudinarius (Schlot h )Ui ntacrinu s sp.R oveacrinus communis DouglasSaccocoma cretacea B ather

ASTEROIDE A .Callider ma S mith ice ForbesCra teraster quinqu eloba Gold £.

var, depressaH y dranderaster simplex Geinitz.M etopaster P arkin soni Forbes

(gia nt oss icles of)es sculptus Spenceruncatus Fo rbesquad ratus Spe ncer

M itraster hunteri Forb es--- - rugatus F orbesPycinaster angustatus Forbes

magnificus Sp en cer

S taurandera ster bulbiferus Forbessenonensis Vale t tc

Thol aster ocellatu s ForbesOphiura sp ,

x

X

XX

X

X

X

z

X

X

X

x

x

x

x

x

z

x

X

Z

x

X

z

Z

XX

X

X

x

X

Z

Z

XX

X

X

X

X

X

x

X

z

X

XXZXXZ

XXX

X

XX

XZZZ

X

XX

XZ

Z

X

X

XZZZZ

X

xX

xZ

XXX

zxX

X

. . } Column IS recorded from this zone

. . in Worthing Di strict.Col. 1 2 no t ye t re corded above this

horizon.

Z

Z

XX

X

x

Col. IS recorded from this zone inW orth ing District.

XX

E CHNOIDEA.Cidaris hir ud o Sor ig- -- perornata Forbes- - - p leracaniha Aq.Cidaris botuerbanki Forbes- - - clavigera Kon .- --- sceptrife ra Mant--- serrifera Forbes- - - subuesiculosa d 'Orb.Conulu s albogalerus Leske--- su brotu ndus Mant- -- glo bu lu s Desor.Discoidea dixoni Forbes-:..-- - subuculus Kl einEchinocory s scutatu s Leske- - - - - va.r, cincta Brydone- - - - - var. depressa Brydone

- --- - va r. eleuata Bryd one- - - - -- var. tectifo rmis Bryd on e-- - - - - var. trunca ta Brydone

H agenowia rostrai a F or besH olas ter planus Ma n t- - - placenta Aq.- - - subglobosus Leske--- trecensis LeymMicraster coranguim lm L eske--- - va r. latior R owe- --- corbovis For bes- - - - cortestudinarium (Goldf)----- leskei D es.- --- - praecursor R oweOffas ter p iiula Lmk.

- - - (la rge forms)Ph y mosoma (Cyphosoma) kcenigi Mant----- radiatum Sorig

{Helicodia dema<Pseud odiadema) fragile Wilt.

Salenia geometri ca Ag .--.- granulosa Forbes

ANNELIDA.Scrpu la ampullucea So w'--- fluc tu ata S . Wo odw.S erpula gordialis Schlot h .--- granulaia Sow.- - - - ilium Sow .

--~--- (la rge for ms )

----- pl ana S. W oodw,- - - plexus Sow.--- turbinella So w.- - - u mbonata Sow.T erebella leuiesiensis Mant.

x

Z

x

zz

x

x

x

X

x

X

Z

X

X

ZZ

zZZ

X

xXX

X

Z

z

X

X

X

x

x

x

Z

Z

xXXX

XX

xX

xZ

x

zz

x

XXX

x

X

X

z

x

X

x

xX

X

x

X

X

X

Z

X

z

XX

X

><

X

x

X

X

x

z

zZ

X

z

X

x

X

z

X

X

XZ

z

zZX

X

X

x

xXX

Z

X

X

X

xZZ

Z

Z

X

X

xXXXX

X

X

X

z

X

X

XXX

x

XX

X

Col. IS commo n in zon e.

Colum n 14 wit h var, cincta in upperpart o f ho ri zon.

Col. 1 2 in top of sub -zone .Col. 13 in base of sub-zone .Col. 9 I specimen fro m pit No. 104.

Col. IS o btaine d from this zone inW orthing District.

Col. 13 in t op of horizon .

Cols, 8 a nd IS abundant in thesehorizons.

Col. 12 in upper be ds of horizon.Col. 13 in lower beds of horizon

(see 1925. p . 10 1) .

Col. IS abundant in this zone.

F or explanation of Table, see p . 339. [P.T.O.

To face page 3W .

Middle chalk zones.

Upper chalk zones.

. . . . . . . -.

Marsupites :studinarius.

Remarks.

I POLYZOA.

CYCLOSTOblATA. Uicazreu sp. Clausa globulosa d'Orb. Entalopora uirgula (V. Hag) Meliceritites dolfussi Perg. Pyricauea francqana d'Orb. Trochiliopora sp. Crisina (Reticrzsina) obliqua u'Orb. Lunulites cretaceus Defr. Herpetopora anglica Lang ------ clavigera Lang

CI1IBHlI\lOKI'HS. Hcxaca~thopova sexspinosa Lang

-- hintburie~zsis Lang brightonensis Lang*

Lagynopora saltdcanensis Lang" - amphora Lang*

ampulla Lang* birlingensis Lang

-- urceolus Lang* Leptocheilopora tenui-labrosa Lang*

arcuata Lang* jilliozati Brydone

Argopora improba Lang* Angelopora missa Lang* Uistansescharella discreta Lang* Pancheilopora magnilabrosa Lang* Hippiopora equestris Lang Aeolopora stellata Lang Dishelopora clauiceps Brydone Tricephalopora saltdeanensis Lang* Polycephalopora trigemina Lang* -- multiplex Lang

quadrigemina I.ang* turgida Lang*

Carydiopora nucula LangY nucella Lang*

Ichnopora ,filiformis d'Orb. denticulata Brydone

Pelmatopora solearis Lang repleta Brydonc simplex Lang* coryli Lang

- brydonei Lang marsupiturn Lang*

----------- roedeanerzszs Lang* - gyrinoides Lang*

palmata Lang ranunculoides Lang* danktonensis Lang bidens Lang lancingensis 1.allg

-- saltdeanensis Lang* -. - colliuirc Lang

promontoriorum Lang

SIIACHIOL'OUA. Cranza egnabergensis Retz. :ol. 15 specimens of small size

common in this zone. --- (exceptional size)

parisiensis Defr. Kingena l ima Defr. Khynchonella cuvicri d'Orb.

limbata Schlot plicatilis Sow.

pp reedemis Eth I'erebratulu curnea Sow. -- senziglobosa Sow.

biplicata Sow. Tevebratulina lata Eth.

striata Dav. romei Kitch.

Thecidea metherelli Morris

LAMELLIBRANCHIATA. Dimyodon Nilssoni Hag. Gyropleura inequirostrata S. \Voodw. Cavdita tenuicosta Sou-. Inoceramus crippsi Mantel1

var. reachensis Eth. ---- cuvieri Sow.

inuolutus Sow. - - inconstans Woods.

labiatus Schlot. --------- var. latus. Sow

- lamarchi Parkinson L i m a cretacea Woods.

h o p e r ~ Mant . -- globosa (Sow) ---- (Ctenoides) diuaricata Uugard Neithea quinquecostatus Sow. Ostrea bouchevoni Coq.

canaliculata Sow. (var. slriata)

-- incurua Nilss. semiplanu Sow.

- -- - wc icularis Ltnlr. ' E'cctcrn beuuevz Sow.

- cvetosus lkfr . ---A s a ~ u m e n s i s \Vootls IYicatula burroisi L'cron . - - -. injlata Sow. Spondylus duternplear~us d'Orb.

latus S o w . spinosus SOW.

Col. 14 base of this horizon only.

- - -

Civvus (Yleurotomaria) perspcctivus Man t . Cevithium sp.

CEPHALOPODA. Nauti lus sp. Acanthoceras rotomagense (Defr.)

SP. Para+uzosia? (Aptychus) leptophylla (Sharp .4ptychus portlochi Sharpe Actinocamax granulatus (Blainv)

quadratus (Defr) - plenus miller)

verus (Miller) Scaphites equalis Sow. S~hloenbachia sp.

- uarians Sow. Prionotropis woollgat,i Mant. Cymatoceras sp. Mantelliceras sp. Turrilites costatus Lanlk.

From A. plenus sub-zone.

From A . plenus sub-zone.

CRUS'TACEA. Scalpellurn (Cretascalp~llum) ,glabrum (Hoetnt

striatum (Lfarw~n) (Arcoscnlpellu~n) maxznium ( J .

C. Sow) Zeugntatolcpas cretace Steenstrup

PISCES. Nacropoma sp. (coprolite) L a m n a appendiculata Ag. Corax falcatus Ag. Ptychodus decurrens Ag. -- mammillaris Ag. Belonostomus cinctus Ag. Oxyrhina augustidens Reuss. Scapanorhynchus (?) gigas A. S. Woodw. ---- rhaphiodon Ag.

./

/~-_ .__.._._--- -_.... " " "

/,.

PLATE 27.

PORTIONSSHOWING

OF SHEETS 318 319, 333THE POSITION OF THE

AND 334 OF THE ONE.INCHCHALK PITS AND SECTIONS

ORDNANCE SURVEY MAPSINCLUDED IN THE TEXT. 1'0 face page 3+U.