CARDIUM. 217 



IMBRICATED COCKLE. 



PI 52./. 1, 2. Mrs. Mawe. 



15. Cardium isocardia. C. testa cordata, costis squamis fornicatis, im- 



bricatis. Linn. Syst. Nat. ed. 12. p. 1122. Linn. Gmel.p. 3249. 

 Shell heart-shaped, ribs with arched, imbricated, scales. 

 Bonan. Recr. 2. f. 95. Mus. Kirch. 2. f. 93. List. Conch, pi. 323. 



f. 160. Rumph. Mus. pi. 48. f. 9. Petiver Gaz. pi. 152. f. 7. Rugenf. 



Conch. 1. pi. 5. f. 56. Born Test. p. 39. Vignette. Chem. Conch. 6. 



pi. 17. f. 174—176. Encyclop. Method, pi. 297. f. 4. 



A strong, heart-shaped shell, of a whitish colour, 

 spotted, or clouded, with brown; it has about thirty- 

 five longitudinal ribs, covered with erect, arched, hollow 

 scales, placed one above the other, like the tiles of a 

 house ; inside white, purple in the middle ; sometimes 

 yellow ; margin strongly denticulated ; hinge with two 

 primary teeth in each valve, one of which is very strong, 

 erect, conical, and slightly incurvated ; lateral teeth, in 

 one valve, deeply excavated, to receive the points of 

 their antagonists. 



Inhabits the East Indies, the Persian Gulf, and the 

 Red Sea ; also the American ocean, on the coasts of Ja- 

 maica, and other West Indian islands. 



