CARDIUM. 225 



have not been taken at sea, but have been for some 

 time lying on the shore, exposed to the sun, are quite 

 white. 



BANDED COCKLE. 

 PL 55. /. 2, 3. Linnean Society's Cabinet. 



24. Cardium rusticum. C. testa antiquata, costis viginti remotis, 

 interstitiis rugosis. Linn. Syst. Nat. ed. 12. p. 1124. Linn. Gmel. 

 p. 3252. 



Shell antiquated, with twenty remote ribs, rugged between. 



Rugenf. Conch. 1. pi. 12. f. 77, 78. Chem. Conch. 6. pi. 19. f. 197. 



This is a variegated shell, with light bands on a rich 

 brown ground ; the bands are sometimes quite white, 

 and sometimes yellowish, brownish, or tending to blue ; 

 the ribs are strong, and generally twenty in number, 

 never more than twenty-two. It resembles the common 

 cockle, but the ribs are more convex and distinct, and 

 the grooves are deeper, and rugged. The inside is white, 

 with a crenated margin. 



Inhabits the European seas, particularly the Mediter- 

 ranean. 



VOL. I. 



