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 sortiewhat heart-shaped, and furrowed longitudinally, retuse 



on one fide. 



Cardium Medium : testa subcordata, anticc retusa longitudinali- 

 ter striato sulcata. Linn, Sj/st. Nat. n. 77. 

 p. 1122. List. Couch, t. 3\6.fg. 152. Guait. 

 /. 83. /. b. Chemn, Conch. 1. 16. fg. 162.— 

 165. 



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

 Our specimen, which differs in no respedl: from those found in the 

 Mediten'anean sea, was found near Hartlepoole, on the coast of 

 Purham. 



K 3 



