128 



Marginatus. Shell fub-cylindric, white, very ftrong, and obtufely 

 pointed, with fix ribbed volutions, finely ftriated in a fpiral 

 dire6lion: aperture oval ; pillar lip thickened ; outer lip ex- 

 tremely thick, and rounded by a rib at the back. Length 

 three eighths of an inch ; breadth one fourtli of its length. 



This fpecies fomewhat refembles T. conifems^ but is more 

 (lender, and the ribs are regularly arched over each volution, 

 and not abruptly finilhed at the top, as in that lliell. 



As aGuemfey produ6lion it is perhaps fcarcely intitled to 

 a place in the Briti/h Tejlacea, but as others from the fame 

 quarter have recently crept into a fimilar work, the critical 

 conchologift has the option of rejecting or retaining it, as 

 may be thought proper. 



From the cabinet of Mr. Laskey . Another fpecimen had 

 eight volutions, much worn, but the apex is more pointed. 



DisJVNCTUS. Shell rather (lender, white, and perfectly fmooth, with 

 fix remarkably rounded volutions, divided by a broad and 

 deep line of reparation, the bottom of which is flat, or a little 

 concave, not angular as in moft other (hells, giving it fome- 

 what the appearance of the volutions being difunited, fimilar 

 to the call: of fome foffil fpecies : aperture nearly orbicular ; 

 pillar lip refle6led, behind which is an umbilicus. Length 

 fcarcely a quarter of an inch. 



From the cabinet of Mr. Laskey, who took it on the 



Scotip> coaft. 



III? 



