CONCHYLIA— i)/TH7i?^. 41. 187 



anterior side, with 20 tubercled ribs, the grooves between which 

 are striate transversely. 

 Cardium exiguum. Gmelin, Syst p. 3255. 



Montagu, Test. Brit. p. 82. 



Pennant, Brit. Zool. iv. p. 186. 



Ldnn. Trans, viii. p. 61. 



Turton, British Fauna, p. 153. 



Dorset Catal. p. 31, tab. 2, fig. 11. 



Wood, Conch, p. 212. 



Dillwyn, Descript. Catal. p. 114. 



Turton, Conch. Diet. p. 31. 

 Cardium pygmeeum. Donovan, i. tab. 32, fig. 3. 



Turton, Linn. Syst. iv. p. 207. 

 Cardium subcordatum. Walker, Test. Minut. p. 23, fig. 83. 

 Cardium muricatum. Walker, fig. 84. 

 Pectunculus exiguus. Ldster, Conch, tab. 317- fig. 154. 

 Mus. nost. Western coasts and Ireland ; sometimes imbedded in 

 hard clay: and both Mrs Griffiths and ourselves have taken them 

 from the interior of the hardest stone in Torbay. 



Shell about half an inch in diameter, whitish with sometimes a 

 rosy tinge, triangular and produced at the anterior side, with from 

 20 to 22 ribs clothed with rounded obtuse tubercles, especially 

 about the shorter side, the grooves of which are not always very 

 distinct, but towards the hinge transversely striate: inside often 

 rosy, with one of the teeth minute. 



** costis transversim squamosis. 



the ribs armed with transverse scales. 



2b ? 



