487 



or three fmall wreatlis, rarely inclined to either fide, ex- 

 cept at the apcx^ where the whirls are only vilible on 

 that fide which makes it a dextral (hell ; but frequently 

 projeQs as far as the margin, fometimes quite low, and 

 almofl; touching that part; others are more confiderabiy 

 elevated. 



In a live, or recent, ftate, it is covered with a rough, 

 pilous epidermis, of a brown colour; beneath which the 

 fhell is of a deep flePn-colour, inclining to carnation : 

 finely ftriated longitudinally, and frequently wrinkled 

 tranfverfely. Infide extremely fmooth, and glofly, ge- 

 nerally of the fame colour,' but brighter, fometimes 

 white; margin of the aperture nearly round, more or 

 lefs undulated or indented, and crenated : the epidermis, 

 which projefls beyond the margin, forms a ciliated bor~ 

 der. Diameter rarely more than an inch; and half an 

 inch, or five-eighths in height. 



This is a rare fpecies, and, as far as we have been able 

 :to afcertain, is only found on the coafts of the weflern 

 counties. It has beerr dredged up at Wtymouth in I)or~ 

 fetfliire; and is fometimes found on the fouth coaft of 

 'Cornwall aid Devonfliire, efpecially about Looe, and at 

 Plymouth; at the lat'er place, we have taken it by 

 dret'iging, attached to Pcclen opercularis, which is com- 

 monly called Frill. Have a!fo fouiul it en the fliore at 

 Milton fands, and have obtained it alive from the bay 

 . g{ Salcomb in the fame county, on \ht. Pinna ingens. 



One 



