96 TELLINA. 



Le Pirel. Adanson, Senegal, p. 227. t. 17. f. 19. 



Inhabits the coasts of Goree. Adanson. 



Shell about an inch broad, and nearly equally long ; thin, brittle, 

 opake, of a dirty white colour, and besides the transverse 

 ridges, is marked with about one hundred extremely minute 

 longitudinal grooves ; the umbones are very obtuse, and 

 placed considerably below the centre. 



guinaica. 55. Shell sub-orbicular, with transverse 

 and very minute longitudinal stria?, and the 

 anterior surface longitudinally waved. 



Tellina Guinaica. Chemnitz, x. p. 348. t. 170. f. 1651 to 



1653. 

 Tellina polygona. Gmelin, p. 3244. Montagu Supp. 

 p. 27. t. 28. f. 4. Wood's Conch, p. 190. 



Inhabits the coasts of Guinea. Chemnitz. Taken off Cramond 

 Island in the Frith of Forth, by Mr. Laskey, Montagu. 



Foreign specimens are about thirteen lines long, and an inch 

 and a quarter broad, but those which have been found on the 

 coast of Scotland, are not half so large ; the shell is of a dirty 

 white colour, marked with fine concentric striae, which are 

 crossed with excessively fine lines, not visible to the naked eye ; 

 the hinge has two large distant teeth in one valve, and in the 

 other a very large triangular bifid tooth, with an approxi- 

 mated small one, which Mr. Montagu says, may easily pass 

 unnoticed ; there are no lateral teeth. It bears some resem- 

 blance to T. polygona, but is much more orbicular. 



scabra. 56. Shell squarish, convex, inflected on 

 the anterior side, and strongly striated trans- 

 versely ; hinge with a single primary tooth. 



Tellina scabra. Chemnitz, xi. p. 208. t. 199. f. 1943 and 

 1944. Wood's Conch, p. 184. 



Inhabits the West Indian Seas. Chemnitz. 



This shell in size, colour, and general appearance, resembles 

 Venus spuria, from which it differs in having only one pri- 

 mary tooth, and two strong lateral teeth, which shut into ca- 

 vities in the opposite valve. 



crassa. 57. Shell roundish, with crowded trans- 

 verse grooves, and one valve flatter than the 

 other. 

 Tellina crassa. Pennant Zool, iv, p. 87. t. 48. f. 28. Mon- 



