CARDIUM. 129 



are triangular, with their interstices strongly wrinkled, and a 

 small heart-shaped depression under the beaks. 



grcenlandicum. 40. Shell heart-shaped, smooth, 

 with decussated striae becoming obsolete 

 towards both ends, and the margin entire. 



Cardium Grcenlandicum. Chemnitz, vi.p. 202. t. 19- f. 198. 

 Gmeiin, p 3252. Biuguiere Enc. Meth. p. 232. 

 Wood's Conch, p. 227. 



Cardium, iSo. 15. Schroeter EinL iii. p. 59« 



Enc. Meth. t. 300. f. 7. 

 Inhabits the coasts of Greenland. Chemnitz. 

 Shell about an inch and a half long, and the breadth in the 



figure appears to be a little more ; Chemnitz says it has the 



habit of a Venus, with the hinge of a Cardium, consisting of 



two very small primary teeth, and two stronger lateral ones ; 



it is marked with very fine, distant, decussated slrize, which 



become more obsolete towards the two ends of the shell ; 



and of a greyish mouse colour, with ferruginous zic-zac 



stripes ; the inside is flesh-coloured. 



pectinatum. 41. Shell somewhat heart-shaped, 

 gibbous, striated longitudinally on the ante- 

 rior, and transversely on the posterior side. 



Cardium pectinatum. Einnaus Syst. Nat. p. 1124. Gme- 



lin, p. 3253. Bruguiere Enc. Meth, p. 223. Wood's 



Conch, p. 229. 

 Cardium iEolicum. Born. Mus. p. 48. Chemnitz, vi. p. 



191. t. 18. f. 187 and 188. Gmeiin, p. 3254. Wood's 



Conch, p. 235. t. 57. f. 1. 

 Cardium dispar. Meuschen, Mus. Gevers. p. 442. No. 



1631. 

 Cardium, No. 10. Schroeter Einl. iii. p. 56. 

 Bonanni Rec. 3. f. 91. and Kirch. 89- Lister Conch. 



t. 314. f. 150. Knorr, v. t. 26. f. 1 and 2. and t. 27. f. 



3. Enc. Meth. t. 296. f. 4. 

 Inhabits the East Indian Seas. Bonamii. Coasts of China. 

 Knorr. Mediterranean. Linneeus. West Indies. Chemnitz. 

 Guinea, and South Sea. Humphreys. 

 This shell is commonly about eighteen lines long, rather more 

 than sixteen broad, and fourteen high, but is sometimes two 

 inches long, with the other dimensions proportionably larger ; 

 it may be readily known by its having the posterior end 

 striated transversely, and the remainder of the surface longi- 



VOL. I. K 



