CARDIUM. 207 



SPINY COCKLE. 

 PL 48. Mr. Sowerby. PL 51. /. 1. Dr. Coombe. 



1. Cardium aculeatum. C. testa subcordata, costis convexis linea exa- 



ratis, exterius aculeato-ciliatis. Linn. Syst. Nat. ed. 12. p. 1122. 



Linn. Gmel. p. 3247. 

 Shell somewhat heart-shaped; ribs convex, and marked with a line; spiny 



on the outside. 

 Testa subcordata obliquata, costis convexis linea exaratis, spinosis acule- 



atis. Brug. Encyclop. Method. Hist. Nat. torn. 6. p. 216. 

 List. Conch, pi. 321. f. 158. Bonan. Recr. 2. f. 96. Mus. 



Kirch, f. 97, 98. Gualt. Test. pi. 72. f. A. Seba Mus. 3. pi. 86. 



f. 4. Knorr Vergn. 6. pi. 3. f. 1. Argenv. Conch, pi. 23. f. B. 



Favanne Conch, pi. 52. f. A. Penn. Brit. Zool. 4. pi. 50. f. 37. 



Chem. Conch. 6. pi. 15. f. 155—157. Encyclop. Method, pi. 298. 



f. 1. Donov. Brit. Shells, pi. 6. Mont. Test. Brit. p. 77. Linn. 



Trans. 8. p. 62. 

 /3. Sowerby, Brit. Miscel. p. 65. pi. 32. 



A strong, convex shell, of a tawny, or yellowish brown 

 colour, with transverse bands of a different shade; the 

 ribs are about twenty in number, strong, convex, grooved 

 down the middle, and furnished with slit spines on one 

 side the shell, and tubercles on the other. The inside 

 is whitish, or flesh-coloured, with flat ribs correspond- 

 ing with the furrows on the outside ; the hinge has two 

 primary teeth in one valve, and one in the other ; the 

 lateral teeth are strong, and prominent. It varies in 

 size, and the young shells are much thinner, and have 

 longer spines. In this state it is the variety £, or Car- 

 dium spinosum, of Mr. Sowerby. 



Inhabits the European and Mediteranean seas, and 

 was first figured as a British shell by Pennant, who 

 says it is found in Scotland, off the Hebrides and 



