CARDIUM. 205 



Oardium, sp. Plate XXXII, fig. IG a, b. 



1897. Cardium, sp. cf. cenomanense, H. Wooih. Quart. Joiini. Geol. Soc-., vol. 



liii, p. 38i), pi. xxvii, tigs. 23, 24. 



Intoi'nal casts, similar in form to G. cenomanense, d'Orbigiiy, are found in the 

 Chalk Rock of Cuckhamsley. A part of the shell is imperfectly preserved on one 

 specimen and is ornamented with fine radial ribs. A cast measures : height, 8 mm.; 

 length, 8 mm.; thickness, 7"5 mm. 



Caudium, sp. Plate XXXII, fig. 17 a—c. 



Two internal casts from the Chalk of Norwich (one of which was found by the 

 late T. G. Bayfield) are in the British Museum (Nos. L 19443, L20lUo). The shell 

 is much inflated, so that the height and thickness are approximately etjual ; the 

 height is considerably greater than the length. The unibones are prominent. 

 The postero-dorsal part of the shell is flattened and shows indications of fine radial 

 ribs. 



This species shows some resemblance to G. venivlcusain, d'Orbigny,' but is 

 relatively higher. 



Stili-ijcuiis — Gkanucakuium, ir. .1/. (Iiilili, 18G9. 

 (" Geul. Survey Calit'uruiii," ' I'aliuout.,' vol. ii, p. 20G.) 



* 



Caedium (Geanocaruium) I'KdiJusciDEUM, Soiverbij, 1817. Plate XXXII, figs. 18, 19; 



PlateXXXIII,figs. 1 — 3. 



181G. Cakuita tuhkkculata, J. Sowcrby. Miu. Coiuli., vol. ii, i>. 1(7, pi. u.\liii. 



(Non Cardium tuhercuhiinm, Liunaus). 

 1817. Cardium pkoboscideum, J. Smrerbi/. Min. Couch., vol. ii, p. 127, ])1. clvi, 



%• 1- 

 1835. — Gentian UM, J. i/e C «'5'((»'«/&y. Ibid. (Systematical ludex), vol. vi, 



p. 242. 

 1854. — PBOBOSCIDEUM, /. Morris. Cat. Brit. Foss., eJ. 2, p. 193. 



— — Gentianum, Morria. ibid., p. 192. 



1866. - PROBOSCIDEUM, /•'. ./. Pirti't and G. Catnpiche. Foss. Terr. Crt't. 



Ste. Croix (Mater. Pal. Suisse, 

 ser. 4), p. 269. 



1 G. ventricosum is recorded from the Upper Greensand (zone of Pecten asper) of Lulworth by 



Barrois ('Terr. Cit't. Super, de rAuglotrrre et de I'ln-laiulc,' 187<;. ji. 02). I have not .seen any 

 English example of tliat species. 



27 



