ISOCARDIA. 



151 



Bemarl:^. — This species occurs in the f'halk Rock, l)iit is not common. All the 

 specimens seen are casts, but one shows a fragment of shell. 



Ti/pe. — The type is stated by Romer to have come from the Pliiner-kalk of 

 Strohlcn (Dresden), but Geinitz says that he has never found the species at that 

 locality. 



BhtrihnHon. — Clialk Rock of Dover, Cuckhamsley, Aston Rowant, Princes 

 Risborough, Thickthorn Hill (Bledlow), and TiUton i-ail\v;iy futting. 



i^.??H(7//— ISOCARDIIDJ^, dray. 



Genus — Isocardia, Lmnarch, 1709. 

 ('Mem. Soc. Hist. Nat. raris,' p. 80.) 



Isocardia similis, Sowerhj, 1826. Text-fig. 25. 



1826. Isocardia similis, /. de C. Sowerhy. Min. Conch., vol. vi, p. 27. pi. dxvi, 



fig. 1. 



— A. (VOrhujny. Prodr. de Pal., vol. ii, p. 163. 



— J. Morris. Cat. Brit. Foss., ed. 2, p. 204. 



— F. J. Pictet and G. Campiche. Foss. Terr. Crct. Ste. 



Croix (Mati'r. Pal. Suisse, ser. 4), 

 p. 240. 



— F. Slolicxl-a. Palffiont. Indica, Cret. Fauna S. India, 

 vol. iii, pp. 188, 194. 



1850. — 



1854. — 



1865. — 



1870. — 



A 



f 



1 



•/ > 



v 



^ 



Fio. 2.x-/sr>fanJi<. simxUt, Sowerby. Lower Greonsnnd, near San.lRnlo. KiKht v.ilvo. nn.l anterior view. 

 British Miisomii (Nat. Hist.). Tlie Typo. NatunU size. 



