CARDIUM. 235 



minating, at the margin of the shell, in a wide fringe, or 

 furbelow, which is so strongly characteristic, that the 

 species can never be mistaken. The other parts of the 

 shell are smooth, and, in colour and appearance, much 

 like the C. edule. The inside is white, the hinge strong, 

 and the lateral teeth prominent. 



Country unknown. 



This curious shell is one, among many rarities, in the 

 cabinet of Mr. Jennings. 



JANUS COCKLE. 

 PL 57. /. 1. Dr. Coombe. 



39. Cardiura iEolicum. C. testa crassa, striis anterioribus longitudina- 

 libns, posterioribus transversis. Linn. Gmel. p. 3254. 



Shell thick ; anterior striae longitudinal, posterior transverse. 



Bonan. Recr. f. 91. Mus. Kirch. 2. f. 89. List. Conch, pi. 314. 



f. 150. Knorr Vergn. 5. pi. 26. f. 1, 2. and 27. f. 3. Chem. Conch. 

 6. pi. 18. f. 187, 188. Encyclop. Method, pi. 296. f. 4. 



A very convex, irregular shell, somewhat truncated 

 before, of a white colour, variegated with brown and 

 reddish spots and stains. This shell presents three 

 distinct faces ; the anterior, which is the smallest, is 

 smooth, protuberant, and shining ; the second extends 

 to the middle of the shell, and is striated, or closely 

 and finely ribbed longitudinally ; the third, or posterior 

 face, occupies the rest of the surface, and is marked 

 transversely, and obliquely, with distant raised striae, 

 which feel rough, when rubbed downwards from the 

 apex. The inside is white in the middle, yellowish 

 near the summit, and somewhat flesh-coloured at the 



