VENUS. 167 



Venus sulcata. Montagu Test. p. 131. Maton and Rack- 

 et, in Lin. Trans, viii. p. 81. t. 2. f. 2. 

 Pectunculus truncatus. Da Costa Brit. Conch, p. 195. 



Inhabits the coasts of Scotland. Montagu. 



Shell near an inch long, and nearly as broad ; strong, thick, 

 with concentric ribs, which are narrower than the intervening 

 furrows, and which become obsolete towards the umbones, 

 and at both ends ; the colour is white, but is covered with a 

 very thick opake dusky brown epidermis. Messrs. Maton 

 and Racket say, that it much resembles V. fasciata, but is 

 more triangular, and straiter at the anterior end, and dif- 

 fers also in the depression, which is oblong-oval. 



montagu i. 19. Shell sub-orbicular, compressed, 

 with obsolete transverse ribs, and the depres- 

 sion heart-spear shaped ; margin entire. 



Venus compressa. Montagu Supp. p. 43. t. 26. f. 1. 



Inhabits the coasts of Scotland. Montagu. 



Mr. Montagu says, that this species very much resembles V. 

 sulcata, and the material difference is, that this is broader 

 than it is long, and has the margin entire, whereas the other 

 measures most in a longitudinal direction, and has the margin 

 crenulated. The name of compressa had been before used 

 by Linnaeus for another species. 



scotica. 20. Shell somewhat heart-shaped, and 

 slightly compressed, with many regular pa- 

 rallel transverse ribs, and the margin entire. 



Venus Scotica. Maton and Racket, in Lin. Trans, viii. p. 

 81. t. 2. f. 3. Montagu Supp. p. 44. 

 Inhabits the coast of Scotland. MLeay, fyc. 

 Shell about half an inch long, and five-eighths broad, thick, with 



from sixteen to twenty-two parallel transverse ribs, and of 



a whitish colour, when stripped of its epidermis, which is 



pale yellowish brown. 



danmonia. 21. Shell somewhat heart-shaped, and 

 slightly compressed ; with regular strong equi- 

 distant transverse ribs, and the margin cre- 

 nulated. 



Venus Danmonia. Montagu Supp. p. 45. t. 29. f. 4. 

 Inhabits the coasts of Devonshire. Montagu. 

 Shell about an inch long, and an inch and a quarter broad, 



and Mr. Montagu says, it is so nearly allied to V. Scotica, that 



