215 



fometimes quite expanded, and conic ; at. other times 

 rolled up, and look like cylindric tubes: at the bafe of 

 thefe above, are two fmall black eyes: on the right fide 

 of the body is a protruded foramen; immediately behind 

 which is a large plumofe appendage ; the fliape is comprelT- 

 ed, broad towards the bafe, and tapering to an obtufe point ; 

 pinnatijied, the pinncB (landing alternate ; thefe are fome- 

 what retraftile, and changeable in form : beneath the 

 tentacula is a broad, bifid membrane, ufually proje6ling 

 into an angle on each fide, but very variable in fhape. 

 Diameter nearly double that of the fhell : colour pale yel- 

 low above; beneath pellucid, yellowilh-white. It does 

 not poffers a teftaceous gizzard. 



We difcovered this new and fingular fpecies on the 

 rocks at low-tide, at Milton fands, on the fouth coall of 

 Devon. 



7 

 Bulla punctata. Lin. Trans, v. p. 2. t.l. f. 6, 7. S ? (Adams.) Catena. 



B. with a pellucid, white, gloffy fhell, clofely and 

 finely ftriated tranfverfely all over; which, under a ftrong 

 magnifier, are feen to be interwoven or formed into linkiJ 

 like a chain : apex obtufe, with a vifible involution : aper- 

 ture extremely large, occupying almofl; the whole of the 

 fhell, except a fmall part at the top; in figure very much 

 refembling the B. aperta. A variety with a more tranfpa- 

 rent zone round it, taking in eight or ten of the catence, 

 which are more ftrongly defined ; the red of the fliell ap- 



P 



ears 



