CARDIUM. 213 



RED COCKLE. 



8. Cardium rubrura. C. testa rotundata, convexa; cardinis dentibus pri- 

 mariisfere obsoletis, later alibus manifestis. Act. Soc. Linn. 8. p. 66. 



Shell round, convex ; hinge with the primary teeth nearly obsolete, la- 

 teral teeth apparent. 



Mont. Test. Brit. p. 83. Walker Minut. Rarior. n°. 86? Penn. Brit. 

 Zool. 1812. 4. p. 189. 



A minute species, about the eighth of an inch broad ; 

 smooth, pellucid, of a red colour, and rounded at both 

 ends. Inside of a glossy red, with a plain margin. 



Inhabits the British ocean. Was found at Sandwich 

 by Mr. Boys, and on the Devonshire coast, at Fal- 

 mouth, and particularly about Kingsbridge, by Mr. 

 Montagu. 



WAVED COCKLE. 



9. Cardium arcuatum. C. testa orbiculari, transverse arcuatim striata. 



Act. Soc. Linn. 8. p. 67. 

 Shell orbicular, with transverse, arched striae. 

 Mont. Test. Brit. p. 85. pi. 3. f. 2. Penn. Brit. Zool. 1812. 4. p. 190. 



A thin, brittle, semi-pellucid shell, of a white colour, 

 marked with very fine arched, or waved, transverse 

 striae, and a few irregular concentric furrows. Inside 

 rather glossy, with a slightly crenated margin ; hinge 

 with a single primary tooth in each valve; diameter 

 nearly half an inch. 



Inhabits Falmouth Harbour, but is not common. 



This elegant species was discovered by Mr. Montagu, 

 and resembles the Tellina divaricata. 



