220 CARDIUM. 



erect, and somewhat incurvated, and two lateral teeth, 

 of which one is more remote than the other. 



Inhabits the coasts of Guinea, according to Petiver, 

 and was found by Adanson, near the mouth of the 

 Niger. 



PROMINENT COCKLE. 



19. Cardium ventricosum. C. testa subcordata, ventricosa, costis angu- 



latis, postice transversim sulcatis, ano ovato, piano. Brug. Encyc. 



Meth. Hist. Nat. 6. p. 228. 

 Shell somewhat heart-shaped, ventricose, ribs angular, transversely 



grooved behind ; below the beak, oval and plain. 

 List. Conch. pJ. 328. f. 165. Born Test. pi. 3. f. 5. Ency clop. Method. 



pi. 299. f. 1. 



This shell is very properly distinguished, by Bru- 

 guiere, from the following, with which it has hitherto 

 been confounded. It is never so long in proportion 

 to its breadth, as the C. magnum, and it grows even to 

 a larger size. It has about thirty-three longitudinal 

 ribs, the seven anterior of which, are flat and imbricated, 

 the twenty-one following are convex, and round, on one 

 side, and angular on the other ; the five last, or poste- 

 rior ribs, are large, convex, but little raised, and without 

 the scaly striae which cross the others. The margin is 

 crenated; the shell is of a ferruginous colour spotted with 

 brown, and sometimes banded with the same. The in- 

 side is reddish at the edges, and near the summit. 



Inhabits, according to Lister, the coast of Campeachy. 

 Bruguiere says it is rare in collections, and adds, that he 

 owes to Lamarck the opportunity of describing the shell. 



