NATURAL SCIENCES OP PHILADELPHIA. 277 



C. crass a, Desh. Coq. foss. Par. i. 119, pi. 18, f. 14, 15. 1824. Is 



Corbicula c r a s s a, Desh. 

 C. eras su la, Mouss. Malak. Bliit. 57. 1855. Is Corbicula cras- 



s u 1 a, Prime. 



33. C. Credueri, Dkr. Weald. 152. 1846. 

 Hab. Germany, (fossil.) 



34. C. ere nu lata, Desh. Inv. Par. 518, pi. 34, f. 10-12. 1857. 

 Hab. France, (fossil.) 



35. C. C u b e n s i s, Prime. 



Cyclas maritima, d'Orb. D'Orb. Cuba 2, 280, pi. xxi. f. 47-50. 1853. 

 Hab. Cuba. 



36. C. Cumin gii, Desh. Proc. Zool. xxii. 22. 1854. 

 Hab. Central America. 



C. c u n e a t a, Jonas. Zeit. Malak. 186. 1844. Is Corbicula c u n e a t a, 

 Adams. 

 C. c une if ormis, Fer. Moll. terr. fiuv. Is Corbicula c u n e i f o r- 

 m i s, Prime. 



37. C. Cun nin gham ii, Forbes. Geol. II. vii. 112, pi. v. f. 9. 1851. 

 Hab. England, (fossil.) 



C. cycladiformis, Desh. Coq. foss. Par. 1, 121, pi. 19, f. 7-9. 1824. 



Is Corbicula cycladiformis, Desh. 

 C. cyclostoma, Bgt. (err.) II. Conch, iv. 193. 1853. Is Ancylus 



cyclostoma, Bgt. 

 C. Cyprinoides, Gray. Ann. Phy. n. ser. ix. 136. 1825. Is Velo- 



rita C yprinoides, Gray. 



38. C. Cyprinoides, Quoy. Voy. Astrol. 3, 513, pi. 82, f. 1-3. 1834. 

 Hab. N. Guinea. 



C. d e b i 1 i s, Gld. Bost. Proc. 3, 293. 1850. Is Corbicula d e b i 1 i s, 

 Prime. 



39. C. de cipien s, Desh. Proc. Zool. xxii. 17. 1854. 

 Hab. ? 



40. C. d e n s a t a, Conrad. Ac. N. S. Phil. Proc. i. 324. 1845. 



Cyclas densata, d'Orb. Prod. 3, 109. 1852. 



Hab. North America, (fossil.) 



C. deperdita, Desh. Coq. foss. Par. 1, 118, pi. 19, f. 14, 15. 1824. 

 Is Corbicula deperdita, Desh. 



C. deperdita, Morris, Cat. Brit. foss. 86. 1843. Is Corbicula B r i- 

 t a n n i c a, Desh. 



C. d e p r e s s a, Lam. Lam. v. 553. 1818. Encycl. pi. 302, f. 3. Is As- 

 tarte borealis, Gray. 



C. depress a, Desh. Diet, class, h. n. v. 290. 1824. Is Cyrena com- 

 p r e s s a, Desh. 



C. Deshayesii, Hebert. Bull. Soc. Geol. Fr. 2d ser. v. 401, f. a', b'. 

 1848. Is Corbicula Deshayesii, Prime. 



C. De shay esianus, Bgt. (err.) II. Conch, iv. 183. 1853. Is An- 

 cylus Deshayesianus, Bgt. 



41. C. d i f f i c i 1 i s, Desh. Inv. basin. Par. 513, pi. 37, f. 3-5. 1857. 

 Hab. France, (fossil.) 



42. C. d i s p a r, Koch & Dkr. Oolit. 60, pi. vii. f. 6, a. b. 1837. 

 Hab. Germany, (fossil.) 



43. C. d i s t i n c t a, Desh. Inv. Par. 492, pi. 35, f. 7-9. 1857. 

 Hab. France, (fossil.) 



I860.] 



