188 CONCHYLIA— DITHYJ?^. 41. 



eduie. Cabdium testd subglobosd antiquatd opacd, costis 26 transversim squa- 

 mosis. 

 Shell somewhat globular antiquated and opake, with 26 ribs which 

 are rough with transverse scales. 



Cardium edule. Linn Syst. Nat. p. 1124. 



Gmelin, Syst. p. 3252. 



Turton, Linn. Syst. iv. p. 205. 



Pennant, iv. p. 189, tab. 53, fig. 3. 



Montagu, Test. Brit. p. 76. 



Linn. Trans, viii. p. 65. 



Turton, British Fauna, p. 153. 



Dorset Catal. p. 32, tab. 11, fig. 1. 



Wood, Conch, p. 226, tab. 55, fig, 4. 



Dillwyn, Descript. Catal. p. 127. 



Turton, Conch. Diet. p. 30. 



Chemnitz, vi. p. 198, tab. 19, fig. 194. 

 Cardium vulgare. Da Costa, p. 180, tab. 11, fig. 1. 

 Cardium rusticum. Donovan, iv. tab. 124, fig. 1, 2. 

 Pectunculus capite minore. Lister, Conch, tab. 334, fig. 171. 

 Mus. nost. Common on all sandy shores. 



A species every where well known, and subject to much variation 

 in size and outline ; being sometimes nearly orbicular, sometimes a 

 little truncate at the anterior end, which is occasionally much elon- 

 gated. 



Mr. Wood remarks that great abundance of the shells are 

 collected and regularly brought to London, from spring to au- 

 tumn, for the sake of the fish, which are regarded as a whole- 

 some nourishment. Martin Lister and Da Costa knew their season 



