PROF. E. FORBES ON LOWER GREENSAND FOSSILS. 243 



extremity. The anterior side is not nearly so truncate. Between 

 the keels the surface is elegantly marked by oblique striae, angu- 

 lated in the centre ; the angle directed forwards. Beyond the 

 keels on each side there appear to be no stria?, but transverse 

 sulcations of growth, which are strongest on the truncated side. 

 The beak is small and incurved. The cast is smooth. 



Loc. Atherfield. The peculiar markings of this shell dis- 

 tinguish it from all other known species. 



36. Cardium Cornuelianum D'Orb. T. C. pi. 256. f. 1, 2. 

 Loc. Atherfield, Peasemarsh. 



Note. Identified with French specimens. 



37. Cardium subhillanum Leym. pi. 7. f. 2. a, b. 

 Loc. Atherfield, Hythe. 



Note. Confounded with Cardium striatulum of the Mineral Conchology, in 

 the list of fossils appended to Dr. Fitton's Memoir in the Geol. Trans., 2d 

 ser. vol. iv. 



38. Cardium peregrinosum D'Orb. T. C pi. 239. f. 1, 2, 3. 

 Loc. Atherfield. 



39. Cardium splicer oideum. Sp. nov. PI. 2. f. 8. 



C. testa longitudinaliter oblonga, subquadrata, tumida, 

 tertia parte regulariter transverse sulcata, sulcis numerosis ; 

 latere anali subhevigato, a parte sulcata sulco longitudinali 

 diviso. 



Lon. 3i*2 ; lat. 2^- unc. 

 Shell inflated, rather oblong and angulated posteriorly. The 

 surface is marked by deep and regular transverse sulcations, 

 which are cut off from the somewhat truncated anal side by a deep 

 longitudinal furrow. The sulcations on a specimen of the above 

 dimensions are about eighty in number. The shell is thick, espe- 

 cially at the margins. The beak is very prominent. The cast is 

 smooth. 



Loc Culver, Hythe, Sandgate. 



Note. The cast of this shell appears to have caused the insertion of Car- 

 dium dissimile in the list of lower greensand fossils appended to Dr. Fitton's 

 Memoir in the Geological Transactions, 4th vol. 2d ser. 



40. Cardium imbricatorium {Lueina sp.) Desh. in Leym. pi. 4. f. 2. 

 Loc. Atherfield, Parham, Hythe. 



Note. I insert this species as a Cardium, on the authority of M. A. d'Orbigny. 

 The British specimens have been identified by comparison with the French. 



41. Cardium Ibbetsoni. Sp. nov. PI. 2. f. 9. 



C. testa suborbiculari, subglobosa, postice subtruncata, 

 longitudinaliter costata ; costis numerosissimis, minutis, planis, 

 squamis transversis minutissimis gerentibus. (Nucleo laevi.) 



Lon. Oy^ ; lat. y 9 T unc. 



R 2 



