264 



POPULAR CONCHOLOGY. 



a Mediterranean species, and larger than the Irish speci- 

 mens, which he calls I. Hibernica. Capt. Laskey has 

 found them off the North Foreland, the Hebrides, and 

 St. Abb's Head. /. Moltkiana is a beautiful species, and 

 of great rarity, from China. 



Cardiomorpha. Koninck. — Shell equivalve, inequila- 

 teral, thin, generally crookedly or transversely lengthened ; 

 the hinge linear, untoothed, hinge plate smooth, and taking 

 in the entire upper edge of the boss to its hinder extre- 

 mity : the ligament is linear, and exterior ; the bosses are 

 curved towards the front ; two superficial muscular im- 

 pressions ; pallial quite simple. — Fossil. 



Family 10.— CHAM A CEA. 



The animal has the mantle for the greater part divided ; 

 behind, there are two short siphons beset with cirri at the 

 edge ; foot small. The shell is attached to rocks, and is 

 irregular ; the hinge has a thick, oblique tooth which 

 passes into a hole in the other valve. Found principally 

 in the seas of hot climates. 



Cham A. Lin. (Jataronus Adans.) — Shell irregular, 



Chama lazarus- 



spiny, or rough, inequivalve ; bosses recurved and un- 



