62 



not lefs than twenty fmall, and moftly mutilated valves 

 were difcovered together in a new fpecies oi Millepora, taken 

 in deep water on the lame coaft. 



Fragilis. Ostrea fragilis, Gmel. Syst. p. 333!2. — Turt. Liu. iv. p. 272. 

 Pecten fragilis, C//ew. Conch, vii. p. 349. t 68. f. 650, r 



Shell lub-ovate, oblong, convex, fragile, fub-pellucid 

 white, wrought with numerous flightly undulated longitu- 

 dinaly?;7>, with two or three minutely fine intermediate ones : 

 valves equal, inequilateral, one fide ftraight, the other arcu- 

 ated: auricles fmall, equal: umbo prominent, fmall, even; 

 beaks diflant. Infide fmooth, white : hinge a little oblique. 

 Length three quarters of an inch ; breadth not quite half an 

 inch. 



Several of thefe fhells were taken by the trawl on the 

 coaft of Devon, intermixed with Sertularice, and in the inter- 

 Jlices of a new and interefting fpecies of Corolina. 



This we believe is the firft inftance of any of the divifion of 

 irregular and fub-auriculated Pedlens being found in our feas. 

 It is nearly allied to Ojlrea fafciata of Linnaeus, but upon 

 comparifon does not exactly accord in the hinge, and is 

 poflelTed of more numerous y?/-/<^, independent of the minute 

 intermediate ones, of which that flicU is deflitute. It is true 

 there appears only a flight diftinftion between P.Jragilis 

 zwCl fafciata of Chemnitz, but the former is longer in pro- 

 portion, and is flatter. As we have not the means of com- 

 paring 



