DONAX. 153 



and three-eighths broad, of a chestnut colour, with a longitudi- 

 nal darker ray, which divides each valve into two nearly equal 

 parts. 



spinosa. 11. Shell wedge-shaped, and truncated 

 at the anterior end, which is marked with 

 decussated striae, and spinous at its margin ; 

 posterior end striated longitudinally. 



Donax spinosa. Chemnitz, vi. p. 264. t. 26. f. 258. Gme- 

 lin, p. 3265. 

 Donax, No. 2. Schroeter Einl. iii. p. 102. 



Inhabits the coasts of Tranquebar. Chemnitz. 



This shell, in its hinge and shape, somewhat resembles D. ru- 

 gosa, but is rather smaller, and differs essentially in its 

 stria?, and in having spines on the margin of the cartilage 

 slope ; it is white on the outside, and the inside is blue ; the 

 transverse stria? at the anterior end are crenulated, and the 

 margin is there toothed more strongly than at the posterior 

 end. 



incarnata. 12. Shell wedge-shaped, truncated, 

 and marked with decussated wrinkled striae 

 at the anterior end, and the posterior end 

 very finely striated longitudinally; margin 

 denticulated. 



Donax incarnata. Chemnitz, vi. p. 265. t. 26. f. 259- 



Gmelin, p. 3265. 

 Donax, No. 3. Schroeter Einl. iii. p. 102. 



Inhabits the coasts of Tranquebar. Chemnitz. 



Shell about ten lines long, and but little more than an inch 

 broad, of a flesh-colour, sometimes marked with a few yel- 

 lowish transverse bands, and the margin denticulated. 



cuneata. 13. Shell ovate-wedge-shaped, compres- 

 sed, thick, and slightly wrinkled at the an- 

 terior end ; margin very entire. 



Donax cuneata. Linneeus Syst. Nat. p. 1127. Born. Mus. 



p. 56, and Vign. at p. 52. Chemnitz, vi. p. 266. t. 26. 



f. 260. Schroeter Einl. iii. p. 97. Gmelin, p. 3263. 



Brooks's Introd. p. 64. t. 2. f. 23. 

 Lister Conch, t. 3<J2. f. 231. Knorr, vi. t. 7. f. 3. Enc. 



Meth. t. 261. f. 5. 



