APHRODITE. 



145 



but small ; muscular and pallial impressions profound, within which 

 the shell is opalescent-white, the margin light yalmon-color ; edge 

 slightly crenated. Length, two and three fourths inches ; height, 

 two and three twentieth inches ; l)readth, one and one quarter inch. 



Pig 454. 



A. Granlrindka. 



One from Awatska Bay measured four and one half by three and 

 three fourths inches ; another four l)y three and three fourths inches. 



Brought from the Grand Banks, Init not as yet found on the shores 

 of this State. Greenland {31dUcr and Haijcs Coll.'); Beechey Island 

 {Belcher} ; Cape Cod Bay (Stiinpson) ; Mingan Island {Packard} ; 

 St. Margaret's Bay, and Bedford Basin ( Willis} ; Bic, St. Anne's 

 (Bell) ; large, heavy specimens from Behring's Straits, Awatska 

 Bay {Stimpson}. 



This singular shell, from its triangular, compressed form, and its 

 smooth surface, has rather the aspect of a Maclra than a Cardium. 

 The not unfrequent entire want of cardinal teeth has misled one 

 distinguished conchologist as to its true relations, while its external 

 characters have so little point that another was not led to it by any 

 existing description, and made of it a new species. Pr. Loven in- 

 forms me that Beck has instituted a new genus for it, which he calls 

 SeiTipes, on account of the serrated margin of the foot. 



The old shells, one of which measures in height three and one 

 fourth inches, in length three and three fourths inches, in breadth 

 10 



