21 



ftrongly murlcated, extending into a beak, forming a 

 large rictus or gape. 



Hinge reflexed and forms feveral cells on the back, 

 which are covered with two flriated valves connefted 

 longitudinally; below the hinge another long plate-like 

 valve affixed to the connecting membrane : teeth, one in 

 each valve projefting inwards ; long, curved, flat : colour 

 white. Length an inch and a quarter : breadth fome- 

 times as much as four inches. 



This fhell has been confidered by fome as diflinft from 

 the Z)(2t7y/z^f of LiNK.EUs : Gmelin however has quoted 

 the figure of Chemnitz and Lister which is evidently 

 this fliell. 



The Pholades are all Borers : this is frequently found 

 in hard clay, marl, and wood: the largefl; we ever faw 

 was on the north fhore at Poole. It is not uncommon 

 on many parts of our coaft from eafl to wefl: : and we 

 have picked it up of a large fizc on the fands o^ Caer- 

 marthenJJiire. 



At Salcovib on the coaft of South Devon, it is found in 

 great abundance together with the P. Candidiis and Par- 

 vus burrowed in the ftumps of old trees, which formerly 

 grew theie, but nov; covered with the tide except at very 

 low water. Thefe are taken by the fifhermen and ufed 



with fuccefs for baitino^ their hooks. 



o 



Pholas 



