PLATE XXXII. 



FIG. I. 

 CARDIUM MEDIUM, 



pigeon's heart cockle. 



GENERIC CHARACTER. 



Two teeth near the beak ; and another remote one on each fide of 



the shell. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell somewhat heart-shaped, and furrowed longitudinally, retuse 



on one fide. 



Cardium Medium : testa subcordata, antice retusa longitudinali- 

 ter striato sulcata. 'Linn. Syst. Nat. n. 77. 

 p.\\22. List. Coyich. t. 316. Jig. 152. GualL 

 t. 83. /. b. Chemn. Conch, t. 16. fig. 162.— 

 165. 



This shell has not hitherto been noticed as of Englifh growth. 

 Our specimen, which differs in no respe<5t from those found in the 

 Mediterranean sea, was found near Hartlepoole, on the coast of 

 Durham, 



K 3 



