CARDIUM. 115 



longitudinal rather remote spinous ribs, mark- 

 ed along the middle with a groove. 



Cardium aculeatum. Linn&us Syst. Nat. p. 1122. Pen- 

 nant Zool. iv. p. 90. t. 50. f. 37. Da Costa Brit. Conch. 

 p. 175. Born. Mus. p. 43. Chemnitz, vi. p. l6l. t. 15. 

 f. 155 and 156. Schroeter Einl. iii. p. 33. Gmelin, 

 p. 3247. Bruguiere Enc. Meth. p. 216. Donovan, i. 

 t. 6. Montagu Test. p. 77. Maton and Racket, in 

 Lin. Trans, viii. p. 62. Wood's Conch, p. 207- t. 48. 

 Bonanni Rec. 2. f. 96. and Kirch, f. 97 and 98. Lister 

 Conch, t.321. f. 158. Gualter, t. 72. f. A. Seba, iii. 

 t. 86. f. 4. Jrgenville, t. 23. f. B. Favanne, t. 51. 

 f. A. 1. jGwc. Meth. t. 298. f. 1. 

 Variety. Shell thinner, and armed with longer spines. 

 Cardium spinosum. Sowerhy Brit. Misc. p. 65. t. 32. Ma- 

 ton and Racket, hi Lin. Trans, viii. p. 62. 

 Inhabits the coasts of Southern Europe. Linn&us. Adriatic. 

 Bonanni. Mediterranean. D'Avila. Coasts of Britain, 

 Pennant, fyc. 

 The length is about two inches and a half, the breadth rather 

 exceeds the length, and the height is near two inches; it has 

 about twenty-one flaftish, spinous ribs, marked with a narrow 

 longitudinal groove in the middle ; the colour is tawny, or 

 yellowish brown, with darker transverse bands, and the inside 

 is white, or pale flesh colour. Mr. Montagu (Supp. p. 31.), 

 says that young shells are thinner, and have the spines longer, 

 in which state it is the C. spinosum of Mr. Sowerby. 



spinosum. 13. Shell somewhat heart-shaped, nearly 

 equilateral, with crowded longitudinal ribs 

 marked along the middle with an obsolete 

 groove, and very spinous. 



Cardium spinosum. Solander's MSS. Portland Cat. p, 



105. lot 2297. Callones Cat. p. 50. No. 940. 

 Cardium echinatum. Bruguiere, Enc. Meth. p. 217- 

 Cardium aculeatum Var. Chemnitz, vi. p. 163. t. 15, f. 



157- Wood's Conch, p. 208. t. 51. f. 1. 

 Seba, iii. t. 86. f. 3. Favanne, t. 52. f. A. 2. Enc. Meth. 

 t. 297. f. 5. 

 Inhabits the Mediterranean. Solander. Naples. Ulysses. 

 The length is about two inches and a half, the breadth two 

 inches and a quarter, and the height two inches ; it differs 

 from C. aculeatum of which it has been generally called the 

 foreign variety, in being nearly equilateral and longer in 

 i 2 



