105 



the beak; the larger end much (loped and truncated ; at 

 which part the ftrise run tranfverfely, and fomewhat un- 

 dulated: a prominent ridge upon the angle oFthe ilope, 

 running from the beak to the oppofite margin : umbo 

 placed near to the larger fide : hinge furniflied with ftrong 

 teeth : a lateral tooth on each fide the middle ones. In- 

 fide purple, very concave under the umbo ; margin den- 

 ticulated. Length about fix-eighths of an inch; breadth 

 one inch. 



Da Costa mufi certainly have been deceived in faying, 

 it is frequent on mofl of our fhores, and that he had re- 

 ceived it from EJfex, Siijfex, Cornwall, and other weftern 

 coafts, the ifles o^ Scilly, YorkJIiire, and from Wales ; alfo 

 from Aherdcenjhire, and the Orkney iflands in Scotland; 

 and from the fhores of the county of Cork in Ireland. 



However this may be, few of our conchological friends 

 ever found it, and it is in general efteemed fo rare that 

 many have doubted its exiftence as a Britijli fpecies. We 

 confefs it has never fallen within our refearches. 



Do6lor PuLTENEY fays it was found at Weymouth ; and 

 Mr. Bryer, a diligent obferver of nature, favoured us 

 with feveral fpecimens, which he allured us he picked up 

 on the coafl; of that place; one of which was intirely white, 

 another plain purple v^ithout rays. 



This fpecies is much ftronger and thicker than the 

 Trunculus, the ftriee more confpicuous, is much longer 



P " in 



