25 



Pholas Candida. Pult. Cat. Dorfet. p. 26. — Tart. Lin. iv. 



p. 173. 

 Pholas Candidas. Br. Zool. t. 39. f. 11. 

 Da Cofta. p. 246. 



P. widi a thin, fragile, femipellucid, oblong, yellow- 

 ifh-white fhell, rounded at both ends ; flriated tranf- 

 verfely, crolled by finer ftriae in a radiated manner from 

 the umbo : a few of the radii at the larger end muricated, 

 or fet with (hort fpines : hinge reflefted, fmooth, forming 

 a ^nus at the back : acceflbry valve one at the hinge, 

 none on the connefting membrane below the hinge. In- 

 fide fmooth, glofly-white : tooth in each valve flender, in- 

 curvated, above which on the margin of one valve is an 

 treft tooth-like procefs. Length three-quarters of an 

 incli ; breadth two inches. 



Tliis appears to be a very local fpecies on our coafts. 



Da Costa certainlv could never have examined a 

 perfeft I'pecimen of this fliell, or he would not have 

 expreded a doubt of its being a difl;in6l fpecies. If every 

 other charaQer was wanting, the ere6l tooth-like procefs 

 is fufficient to difcriminate it ; but it is alfo readily dif- 

 tinguiPned from all the preceding fpecies, by the valves 

 fhuttin£[ clofe at the larger end. 



Lister met with it at the mouth of the river Tees, 

 but fays it is fcarce. Doftor Pulteney fpeaks of it as 

 a fiiell of the Dorfetjliire coaft. 



E We 



