181 



This fpecies is not uncommonly twelve inches long; 

 and feven inches broad at the gaping end. 



The principal diflinftion between the young and the P. 

 peEltnata confifls, in this being more wrinkled, broader in 

 proportion to its length, (horteft on that fide where the 

 hinge is placed; and in fijch pofielTed of fpines, th le as 

 well as the ribs, are lefs numeious, and more diftant. 



Mr. Pennant feems to be the only one who has made 

 mention of this fliell, and that under the denomination of 

 Pinna ingens. He fays, " I faw fpecimens of fome vafl 

 " PinncB, found amongfl the farther Hebrides, in the col- 

 "leftion of Dotlor Walker, at M(ff;it. They were very 

 " I'ugged on the outfide, but I cannot recollect whether 

 *•' they were of the kind found in the Mediterranean or 

 " Wcjl Indies. 



Lister's fhell, here quoted, is much like this in fliape; 

 but that feems to be furniflied all over with fmall fpines, 

 or fcales, which renders it doubtful. 



We difcovered a bed of thefe fhells in Salcomb bay, in 

 Devonjliire ; where they are called by the fifiiermen French 

 Mujcles or Scallops. 



They lie on a gravelly bottom covered with mud, and 

 long fea- weeds; and are only to be got, at particular times 

 when the fea recedes farther than ufual. 



Tl:ev 



