262 CRETACEOUS LAMEELIJ3RAN(!IIIA. 



(Continued from paxje 95.) 



Genus — Inooeramus, /. Sowerhij,^ 1819. 



(J. Parldusou [c,« Sowerby MS.], 'Traus. Geol. Soc.,' ser. 1, vol. v, 1819, p. 55. J. Sovverby, 

 ' Traus. Liun. Soc.,' vol. xiii, 1822, p. 455.) 



Inooeramus neocomievsis, (VOrhiijui/, ]SU). Plate XLV, figs. 1, 2. 



1846. Inoceramus neocomiensis, A. (VOrbitjny. Pal. Frau^. Terr. Grot., vol. iii, 



p. 503, pi. cccciii, figs. 1,2. 

 1850. — — d'Orbigny. Prodr. de Pal., vol. ii, p. 83. 



1854. — —J. Morris. Cat. Brit. Foss., ed. 2, p. 170. 



1855. — — G. Cotteaii. Moll. Foss. de FYoune, p. 107. 

 1869. — — F.J.PictetandG.Campiche. Foss. Terr. C ret. 



Ste. Croix (Mater. Pal. 



Suisse, sor. 5), p. 104. 



1900. — — A. Wolleniiinn. Die Bivalv. ii. Gastrop. d. 



deutscli. u. liolliiud. 

 Neocoms, p. 60. 

 ? 1905. — — E. Harhori. Die Fauua d. Scliauniburg- 



Lippe'selieu Kreidemulde, 

 p. 44, pi. ix, figs. 4-6. 



Desciijdiou. — Shell ine(|uivalve, very inequilateral, a little liiglier than long. 

 Valves convex, with flattened sides, and the posterior part compressed. Anterior 

 margin nearly straight ; posterior and ventral margins rounded. Posterior 

 margin forming an obtuse angle with the hinge-line. Anterior part nearly 

 perpendicular to the plane of the valves and excavated near the umbones. 

 Umbones terminal, curved inwards and forwards. Hinge-line equal to more than 

 half the height of the shell, and making an angle of about 1U0° with the anterior 

 margin. 



Ornamentation consists of narrow, regular, concentric ribs with an nnsym- 

 metrical curvature; the interspaces are broad and regularly concave. 



^ 111 rearranging the collection of Inocerami in the British Museum, Mr. E. B. Newton and Mr. 

 C. D. Sherboru have found several type-specimens, the existence of which had not been previously 

 recognised ; this discovery has greatly facilitated my work. I am also indebted to Mr. Newton and. 

 Mr. Sherboru for assistance in selecting specimens for figuring. I Avish to thank Mr. C. P. Chatwin 

 for information respecting the zonal distribution of the species of Inoceramus in the Chalk and for 

 other assistance. Dr. Blackmore, Dr. Eowe, and Mr. G. E. Dibley have helped by the loan of 

 numerous specimens from their collections. 



