CARDIUM COCKLE. 159 



CARDIUM Eduk* 

 COMMON COCKLE 



Specific character. Shell convex, sometimes 

 produced at the posterior end, with about twenty- 

 six longitudinal ribs and transverse wrinkled 

 striae, which in old specimens appear somewhat 

 imbricated ; colour whitish, or pale ferruginous ; 

 about an inch and a quarter long, and an inch 

 and a half broad. 



This species is very common in most of our 

 inlets and bays near the mouth of rivers, where 

 the shore is sandy. They are found buried 

 three or four inches under the surface. The 

 mollusca, when boiled, afford a wholesome 

 nourishment. 



CARDIUM Tuberculatumj 

 TUBERCULATED COCKLE. 



Specific character. Shell somewhat orbicular, 

 ponderous, slightly truncated at - the anterior 

 side, with twenty-one ribs, the anterior ones 

 having sharp tubercles, and the posterior thick 

 transverse scaly plates ; colour, pale brown, with 

 darker transverse bands ; breadth not quite four 

 inches, and rather exceeding the length. 



This shell, and the Cardium Echinatum, 



* Edule. eatable, from the Latin ed ere, to eat 

 f Plate VIII. figure 2. 



