210 CARDIUM. 



Mr. Montagu. Mr. Donovan mentions it from the 

 Orknies. The C. ciliare of Chemnitz, 11. pi. 200. 

 f. 1951, does not sufficiently accord with the above, to be 

 placed among the synonyms. 



TUBERCULATED COCKLE. 

 PL 50. /. 1,2. Mr. Sowerby. 



4. Cardium tuberculatum. C. testa subcordata, costis obtusis, nodosis, 



transversim strialis. Linn. Syst. Nat. ed. 12. p. 1122. Linn. Gmel. 



p. 3248. 

 Shell somewhat heart-shaped, ribs obtuse, knotty, and transversely 



striated. 

 List. Conch, pi. 329. f. 166. Gualt . Test. pi. 71. f. M. Seba Mus. 3. 



pi. 86. f. 7. Chem. Conch. 6. pi. 15. f. 173. and pi. 19. f. 191. Pult. 



in Hutch. Dorset, pi. 2. f. 2. Donov. Brit. Shells, pi. 107. f. 2. 



Mont. Test. Brit. p. 79. and p. 568. Linn. Trans. 8. p. 64. 



A strong, rust-coloured, banded shell, the size and 

 shape of the C. echinatum; the ribs are remote, obtuse, 

 and, as well as the furrows, are strongly striated trans- 

 versely : the sides, and extremity of the shell, are some- 

 what knotty. 



Inhabits the Mediterranean, and British sea, where it 

 was first noticed, on the Dorset coast, by Dr. Pulteney, 

 and has been since found at the mouth of the Ex, in 

 Devonshire, by Mr. Montagu. It greatly resembles the 

 C. echinatum, but is longer in proportion to its breadth, 

 and has never been found with spines. 



