222 CHAMA. 



ter, t. 101. f. D and E. Klein Ost. 1. 12. f. 81. Seba, 

 iii. t. 88. f. 8, and t. 89- f. 12. Knorr, i. t. 21. f. 2, v. t. 

 14. f. 2, and vi. 1. 16. f. 1 and 2. Favanne, t. 43. f. A 1, 

 and A 2. Ewe. MeM. t. 196. f. 4 and 5. 

 Inhabits the Mediterranean on the coasts of Africa. Linnaus. 

 Barbadoes and Jamaica. Lister. Island of Goree, and 

 Cape Verd. Adanson. East Indies. D'Avila. Naples. 

 Ulysses. St. Domingo, and the Molucca Islands. Hum- 

 phreys. 

 This shell is of the same size as C. Lazarus, but is thicker, and 

 has the imbricated lamella? shorter, stronger, and more vault- 

 ed ; it is often of a pale rose or citron colour, prettily mottled 

 with white. C. macerophylla has the laminae rather more 

 produced, as is generally more or less the case towards the 

 margin, and I can find no mark to distinguish either it or 

 Gmelin's C. citrea from this species. 



CORNUTA. 20. Shell scaly, wrinkled, or tubercu- 

 lated, with the summit of the lower valve ob- 

 liquely and spirally elongated like a horn ; 

 margin smooth. 



Chama cornuta. Chemnitz, vii. p. 150. t. 52. f. 516 to 



520. 

 Chama bicornis. Linnaeus Syst. Nat. p. 1139. Schroeter 



EinL iii. p. 245. t. 8. f. 18. Gmelin, p. 3303. 

 Chama unicornis. Bruguiere Enc. Meth. p. 389- 

 Ohama fusca. Gmelin, 3304. 

 Chama, No. 10. Schroeter Einl. iii. p. 252. 

 Fab. Columna, f. 19. Lister Conch, t. 214. f. 49- Petiver 



Gaz. 1. 152. f. 1. Gualter, 1. 101. f. G and I. Klein 



Ost. t. 12. f. 87 and 88. Enc. Meth. 1. 196. f. 6. 

 Inhabits the Mediterranean. Linn&us. 



This shell in size and colour resembles the preceding species, 

 but is distinguished by the long horn-like process at the sum- 

 mit of the lower valve, which it sometimes exceeds in length, 

 and by the smoothness of the margin ; Columna has given 

 two figures in different points of view of the lower valve 

 only, and these have been copied by several subsequent au- 

 thors who mistook them for the two opposite valves, whereas 

 the upper one has not any horn-like process, and the name 

 of bicornis is therefore improper. 



sessilis. 21. Shell sub-orbicular, with transverse 

 rows of imbricated plaited spinous scales, and 

 the inside dotted ; margin crenulated. 



