CYPRICARDIA. 



TESTA aequivalvis, insequilatera, oblique vel 

 transversim elongata, latere postico brevissimo. 

 Cardo dentibus tribus infra umbonem et dente 

 laterali, subelongato, antiee porrecto. Im- 

 pres stones musculares duae, subirregulares, la- 



I terales. 



rTnis Genus as it is established by Lamarck^ contains 

 shells of very different characters^ for without taking upon 

 us to decide about the propriety of uniting his C. coral- 

 liophaga, (a shell whose animal perforates Corals) with 

 his C. guinaica, angulata, and rostrata, (which certainly 

 have not perforating animals^ though they may probably 

 attach themselves by a byssus,) we must proceed to men- 

 tion that his C. modiolaris undoubtedly belongs to our 

 Astarte, (his Crassina), and we believe the same to be the 

 case with his two last species C. obliqua and trigona. On 

 account of our slight acquaintance with this Genus^ its 

 species being so rare, we are induced to give it a place 

 in order to direct the attention of conchologists to it, 

 and thereby to obtain such information as shaU enable us 

 to assign to it its proper place in the system. 



Shell equivalve, inequilateral, obliquely or trans- 

 versely elongated, with the posterior side very short. 

 Three teeth are placed in each valve just within and be- 

 hind the umbo, and one rather elongated lateral tooth is 

 extended towards the anterior side. There are two rather 

 irregular, lateral muscular impressions ; but the muscular 

 impression of the mantle is so indistinct, we cannot as- 

 certain whether or not it is entire. 



