150 
cuneated ; it is consequently much less oblique: it is 
also rather shorter in proportion. 
Extremely common in Crag at Bramerton, Ipswich, 
Woodbridge, &c. where it is usually much rounded by 
attrition. 
Fig. 1 represents Cardium edule in a half petrifyed 
state, from St. Austle in Cornwall: it serves to shew the 
difference of form between edule and edulina. 
