VENUS. 177 



Venus mercenaria. Pennant Zool. iv. p. 94. t. 53. f. 47. 



Venus Bucardium. Bom Mas. p. 63. t. 4. f. 11. 



Venus tumens. Gmelin, p. 3292. ? 



Venus, No. 138. Schroeter Einl. iii. p. 196. 



Pectunculus crassus. Da Costa Brit. Conch, p. 183. 1. 14. 

 f. 5. 



Lister Atiim. Aug. t. 4. f. 22. and Conch, t. 272. f. 108. 

 Gualter, t. 85. f. B. Olaffsen Is!. 1. 1 1. f. 8. 

 Inhabits the coasts of Iceland. Linnaus. Britain. Lister, fyc. 



Senegal. Adanson? Norway and Greenland. Midler. 

 Full grown shells are about three inches and a half long, and 



three inches and three-quarters broad ; thick, ponderous, 



irregularly striated transversely, and covered with rather a 



glossy yellowish brown, or blackish epidermis ; the inside is 



white, and the margin very entire. V. minuta of Fabricius 



and Gmelin, is most probably the young of this, or at all 



events of some other neighbouring species. 



coaxans. 43. Shell somewhat heart-shaped, obso- 

 letely striated transversely, coated with a 

 greenish epidermis, and the umbones decor- 

 ticated ; margin very acute. 



Venus coaxans. Gmelin, p. 3278. 



Venus Ceylonica. Chemnitz, vi. p. 333. t. 32. f. 336. 



Venus erosa. Solander's MSS. Portland Cat. p. 71. lot 



1603. and p. Iri6. lot. 3961.? 

 Venus, No. 17. Schroeter Einl. iii. p. 160. 

 Tellina coaxata. Meuschen Mas. Gevers. p. 462. No. 1775. 

 Rumphius, t. 43. f. H. Petiver Amb. t. 18. f. 18. 



Inhabits rivers in Ceylon. Chemnitz. 



Shell about two and a half inches long, and three inches broad ; 

 the colour, when stripped of the epidermis, is whitish, and 

 the inside is white tinged with purple at the anterior end ; the 

 cartilage cleft is long, and gaping, and two of the teeth of 

 the hinge are notched. I suspect that this is the V. erosa of 

 Solander, and Mr. Humphreys describes the epidermis in 

 one of the specimens in the Portland Cabinet to have been 

 black, of which colour it had probably been stained by the 

 mud, as is frequently the case with many other fresh-water 

 shells. 



lusoria. 44. Shell somewhat heart-shaped, pon- 

 derous, glabrous, with the anterior slope 

 truncated, and the margin very entire, 



VOL. I. n 



