VENUS. 193 



naceous at both ends ; anterior depression 

 excavated, and the posterior cordiform. 



Venus prostrata. Linnaeus Syst. Nat. p. 1133. Born Mus. 

 p. 71. t. 5. f. 6. Chemnitz, vi. p. 302. t. 29- f. 2^8. 

 Schroeter Einl. iii. p. 1 37. Gmelin, p. 3283. 

 Enc. Method, t. 277. f. 1. 

 Inhabits the coasts of Tranquebar. Linnaeus. Coromandel. 



Chemnitz. 

 Shell about twenty-two lines long, and twenty-three broad, of 

 a brownish or blackish grey colour ; the transverse striffi, 

 which become more elevated and membranaceous at both 

 ends, give the margin of the anterior depression a toothed 

 appearance. Chemnitz, vii. t. 37. f. 393. which he consi- 

 dered to be a Variety of this species, is probably a Variety 

 of V. concentrica. 



pensylvanica. 79. Shell sub-orbicular, slightly 

 ventricose, thick, with transverse membrana- 

 ceous striae, and inflected with a longitudinal 

 furrow on the anterior side; margin obso- 

 letely crenulated. 



Venus Pensylvanica. Linnaeus Syst. Nat. p. 1 134. Born 

 Mus. p. 72. t. 5. f. 8. Chemnitz, vii. p.12. t. 37. f. 394 

 to 396. Schroeter Einl. iii. p. 138. Gmelin, p. 3283. 

 Lucina. Enc. Method, t. 284. f. 1 . 

 Lister Conch, t. 305. f. 138. Argenville, t. 21. f. N. 

 Knorr, iv. t. 14. f. 4. Favanne, t. 47. f. I. 

 Inhabits the coasts of Barbadoes. Lister. Carolina. Petiver. 

 Jamaica. Sloane. West Indies. Humphreys. Naples. Sir 

 C. Ulysses. 

 Shell generally about an inch and a half, or two inches long, 

 and the breadth scarcely exceeds the length ; the colour is 

 white, and the transverse membranaceous striae are tinged 

 with brown. 



jamaicensis. 80. Shell sub-orbicular, slightly ven- 

 tricose, with transverse membranaceous striae, 

 and inflected with a longitudinal furrow at 

 both ends ; posterior depression minute ; mar- 

 gin entire. 



Venus Jamaicensis. Chemnitz, vii. p. 24. t. 39. f. 40S and 



409. 

 Venus Pensylvanica Var. 0. Gmelin, p. 3283. 



VOL. I. O 



