126 CARDIUM. 



Cardium latum. Born. Mus. p. 48. t. 3. f. 9. Chemnitz, 

 vi. p. 197. t. 19. f. 192 and 193. Gmelin, p. 3255. 

 Bruguiere Enc. Meth. p. 234. ? Wood's Conch, p. 236. 

 t. 57. f. 4 and 5. 

 Cardium, No. 13. Schroeter Einl. iii. p. 57. 

 Knorr, vi. t. 7. f. 6. 

 Inhabits the coasts of Tranquebar and the Nicobar Islands. 



Chemnitz. 

 Shell rather more than nine lines long, thirteen and a half broad, 

 and eight lines high, but is sometimes almost twice as large ; 

 it has about forty longitudinal flattish ribs, rendered rough 

 to the touch by minute elevated points, and those at the 

 anterior end are more distant than the others ; the colour is 

 whitish, or pale ferruginous, sometimes marked with yellow- 

 ish transverse bands or spots, and the apices are often of a 

 violet colour. 



rigidum. 33. Shell roundish, heart-shaped, angu- 

 lated at the anterior end, and produced at 

 the margin; ribs crenulated, and somewhat 

 nodulous. 



Cardium rigidum. Solander's MSS. Wood's Conch, p. 236. 

 t. 57. f. 2 and 3. 



Inhabits 



Shell seven lines long, seven broad, and five high ; whitish, 

 sometimes variegated with reddish brown, and covered with 

 a strong thick, wrinkled epidermis ; the little tubercles are 

 sometimes wanting on the ribs, and appear as if they had 

 been worn off. 



pectiniforme. 34. Shell roundish, compressed, 

 with triangular ribs, and the sides muricated. 



Cardium pectiniforme. Born. Mus. p. 49- t. 3. f. 10. 

 Chemnitz, vi. p. 188. t. 17. f. 180. Bruguiere Enc. 

 Meth. p. 227- Wood's Conch, p. 233. 

 Cardium magnum Var. y. Gmelin, p. 3251. 

 Cardium, No. 7. Schroeter Einl. iii. p. 55. 

 Gualter, t. 71. f. H. 



Inhabits 



Born describes this species to be one inch long, and three 

 quarters of an inch broad, somewhat orbicular, and deeply 

 grooved ; ribs triangular, transversely crenated, and those at 

 each end made rough by minute vaulted scales ; margin 

 crenated, and at the anterior end serrated ; the outer surface 



