Class VI. CARDIUM. COCKLE. 187 



Lin. Syst. 1122. No. 78. 



Lin. Tr. viii. 62. 



3. ACULEA- 



Gm. Lin. 3247- 



Mont. Test. Br. 77. 



TUM. 



aculeated. 



C. with high ribs radiating from the hinge to 

 the edges; each rib sulcated in the middle; 

 and near the circumference beset with large 

 and strong processes, hollowed. One side of 

 the shell projects further than the other, and 

 forms an angle. Color yellowish brown. As 

 large as a fist ; the marginal circumference ten 

 inches and a half, 



Found off the Hebrides and Orknies; [also on 

 the Devonshire coast. 



Tab. liii. jig. 1. 



Lin. Tr. viii. 62. Sow. Br. Misc. 65. t. 32. 4, spinosum. 



* C. with a shell somewhat obliquely heart- 

 shaped, abrupt at one end; the larger ridges 

 spiny. 

 Devonshire coast. 



Lin. Syst. 1122. No. 79. Gm. Conch, tab. 324 5. echjna- 



Lin. 3247- Lin. Tr. viii. 63. tum. 



Faun. Suec. No. 213g. Mont. Test. Br. 78. echinated. 

 List. Angl. tab. v. Jig. 33. 



C. smaller than the former, being little more than 

 six inches in circumference ; the color white ; 



