268 OSTREA. 



f. 1 1, t. 2. f. 16, t. 5. f. 51, and t. 1 1. f. 51. Enc. Meth. 

 t. 2J2. f.3. 



Inhabits the American Ocean. Linnaus. Coasts of Jamaica. 

 Brown. Guinea and the West Indies. Chemnitz. 



Shell about an inch and a half long, and rather more than nine- 

 teen lines broad, generally of a bright red, orange, or some- 

 times yellowish colour, and the inside white, more or less 

 tinged with red towards the margin ; the smallest of the two 

 auricles being oblique, and its longitudinal strise serve, as well 

 as the colour, at once to distinguish this species from O. nu- 

 cleus. 



turgida. 46. Shell sub-orbicular, gibbous, with 

 about twenty elevated ribs, and the inter- 

 stices strongly wrinkled transversely; mar- 

 gin plaited. 



Ostrea turgida. Gmelin, p. 3S27. 



Ostrea conspersa. Gmelin, p. 3320. 



Ostrea florida. Gmelin, p. 3330. 



Ostrea guttata. Gmelin, p. 3330. 



Ostrea farcta. Solanders MSS/t 



Ostrea, No. 12. Schroeter Einl. iii. p. 327, No. 48. p. 

 339, No. 56. p. 341, and No. 62. p. 342. 



Pecten gibbosus variegatus. Chemnitz, vii. p. 323. t. 65. 

 f. 621, a and b. 



Lister Conch, t. 169- f. 6. 

 Inhabits the East Indies. Lister. Coasts of the Island of St. 



Croix in the West Indies. Chemnitz. 

 Shell usually about three-quarters of an inch, or an inch long, 



and the breadth rather exceeds the length ; it has the valves 



equal, and rather more convex than in the foregoing species 



from which it also differs in size and colour, and in having 



the ribs more elevated ; the lower valve is white, and the 



upper is yellow, variegated, clouded, or spotted with grey 



or reddish brown. 



pyxidata. 47. Shell sub-orbicular, with about 

 thirty smooth ribs, and the upper valve flat- 

 tish ; margin plaited. 



Ostrea pyxidata. Born Mus. p. 108. t. 6. f. 5 and 6. ' 

 Ostrea sulcata. Gmelin, p. 3325. 

 Ostrea, No. 6. Schroeter Einl. iii. p. 324. 

 Pyxis sulcata. Chemnitz, vii. p. 299- t. 63. f, 603 and 604. 

 Inhabits the coasts of Malabar. Chemnitz. 



