DONAX. WEDGE-SHELL. 4 1 



DONAX. WEDGE-SHELL. 

 Shell with two valves, with the cartilage side 

 very obtuse and abrupt : hinge with two primary 

 teeth, and a single remote lateral-one on the poste- 

 rior side. 



1. Donax Trunculus. Smooth Wedge-shell. 



Lister, pi. 376. f. 217 Pennant, pi. 58. f. IDa Costa, 

 pi. 14. f. 3 Limi. Trails, vi. pi. 1. f. 13, 14, 15, 16 Do- 

 iywan, pi. 29. f. 1 Dorset Cat. pi. 6. f. 3. 



Shell oblong, rounded at "one end and a little produced at. 

 the .other, glossy, covered witli a thin pale ' chesimt or 

 olive-green skin, finely striate longitudinally with often a 

 few irregular transverse striae near the pointed end, a little 

 contracted at the margin near tke pointed end : color yel- 

 lowish-white, with a few faint rays from the beak, to the 

 margin, and generally a few jbrmvn. and purple transverse 

 bands ; the margin finely toothed :. beaks small, near the 

 abrupt end ; inside rich purple : length more than half an 

 inch ; breadth an, inch and a half. 



Sandy coasts of England, Ireland, and Scotland, v. v. 



2. Donax denticulata. Toothed Wedge-Shell. Fig.19. 

 Lister, pi. 376. f. 218 Dorset Cat. pi. 5. f. 12 Pen- 



nant, pi. 58. f. 2. . . 



Donax crenulata. Donovan, pi. 24. 



Shell strong, thick, somewhat wedge-form, abruptly 

 sloped at the larger end, where i.t is truncate and much 

 more convex, with a prominent ridge from-. the beak to the 

 *argin, dividing the slope in the middle ; finely striate lon- 

 gitudinally, and punctured in the interstices ; on the parfc 

 jof the slope next the margin, towards the hinge, the striae 

 become transverse and undulated : colpr whitish, brown- 

 ish, yellowish or purple, with mostly a few longitudinal 

 purple rays from the beak ; inside white, the margin finely 

 notched : beaks near the larger end ; teeth strong, with a 

 lateral one on each side the middle ones : length seven 

 lines ; breadth an inch. 



On Weymouth and Dawlish sands ; .very Tare- .v. m. : 



E3 3. Donax 



