CARDIUM. 211 



MARBLED COCKLE. 

 PL 50./. 3. Mrs.MAWE. 



5. Cardium medium. C. testa subcordata, subangulata, valvis angulatis, 



sulcatis, striatis. Linn. Syst. Nat. ed. 12. p. 1122. Linn. Gmel. 



p. 3246. 

 Shell somewhat heart-shaped, subangular, the valves angular, grooved, 



and striated. 

 Testa subcordata, antice utrinque carinata, costis longitudinalibus con- 



vexis, transversim dupliciter striatis. Brug. Encyc. Meth. Hist. Nat. 



6. p. 213. 

 List. Conch, pi. 316. f. 153. Bonan. Recr. 2. f. 94. Mus. Kirch. 



2. f. 91. Gualt. Test. pi. 83. f. B. Knorr Vergn. 2. pi. 29. f. 5. and 



5. pi. 20. f. 5. Spengler Conch, pi. 1. f. k. Chem. Conch. 6. pi. 16. 



f. 162—164. Encyclop. Method, pi. 96. f. 1. Donov. Brit. Shells, 



pL 32. f. Is Mont. Test. Brit. p. 83. Linn. Trans. 8. p. 61. Penn. 



Brit. Zool. 1812. 4. p. 186. 



A strong, heart-shaped shell, waved, and angular, or 

 truncated, before; of a whitish colour, marbled or spotted 

 with red, and dark brown; sometimes variegated with 

 other colours ; the ridges are numerous, and covered with 

 very close set, curved striae, which, when magnified, have 

 the appearance of cat-gut, and give a roughness to the 

 surface of the shell ; inside generally white, but some- 

 times of a deep red; hinge with a single, erect, incur- 

 vated, primary tooth; lateral teeth strong, and pro- 

 minent. About the size of a walnut. 



Inhabits the Indian and American ocean, and also 

 the coasts of the Antilles. It is figured in Donovan's 

 British Shells, from a specimen found at Hartlepole, 

 Durham, by the Rev. T. Rackett. 



