188 CARDIUM. COCKLE. Class VI. 



the ribs echinated higher up ; has only six- 

 teen ribs, the former twenty-one ; the shape 

 rounder. 



Found dead on many of our shores. 



6. ciliare. Lin. Syst. 1122. No. 80. Lin. Tr. viii. 64. 



fringed. Qm. Lin. 3248. Mont. Test. Br. 79. 



C. with a very brittle and delicate shell ; of a 

 pure white ; eighteen ribs rising into thinner 

 spines. Of the size of a hazel nut. Tab. lii. 

 fig- 2- 



7. tubercu- Gm. Lin. 3247. Mont. Test. Br. 78. 



latum. Lin. Tr. viii. 63. 



* C. with a shell somewhat heart-shaped, the 

 furrows marked with a ciliated line, with many 

 bent spines. 



Found at the mouth of the E.r, Devonshire, 

 and on the Dorsetshire coast. 



8. LjEviga- Lin. Syst. 1123. Ao. 88. Lin. Tr. viii. 65. 



TDM. Gm. Lin. 3251. Mont. Test. Br. 80. 



smooth. 



C. of a sub-oval shape, somewhat depressed; 

 of a deep brown color, with obsolete longitu- 

 dinal stria ; and a few transversal, concealed 



