304 PYRAMIDELLID^E. 



vary as to proximity in difforcnt individuals ; the latter, 

 which are often obscure beneath the sutures, are chiefly 

 apparent in the intervals of the costellre. The spire is 

 composed of four convex (or at times even ventricose) 

 turns, that are decidedly narrower above than below, are 

 of quick longitudinal increase, and are very profoundly 

 divided from each other at their oblique and subcanalicu- 

 lated suture : they are sometimes subscalar, in which case 

 the whorls are flatter than usual. The body, which is 

 quite as long as the rest of the whorls united, is generally 

 convexly subeylindraceous, and more rarely subventricose ; 

 the base is a little attenuated and slightly produced, its 

 declination is convex, and rather gradual. The mouth, 

 which occupies about two-fifths of the entire length, is 

 elongated, and oval-acute ; it is gradually contracted above 

 by the scarcely convex base of the preceding turn, which 

 forms an obliquely subrectilinear almost continuous line 

 with the columella. The outer lip is simple, acute, and 

 not dilated ; it is never much arcuated nor projecting, more 

 frequently, indeed, it is straightish posteriorly. The pillar 

 lip is very narrow, and is not furnished with any distinct 

 fold, though occasionally (yet rarely) a rudimentary one is 

 just perceptible. There is no umbilical crevice. The 

 length of the shell is scarcely a line and a half; the basal 

 diameter rather exceeds the twentieth of an inch. 



This is a rare and local species, to which Mr. Jeffreys 

 assigns the following localities : Santlwich, Exmouth, Sal- 

 combe Bay, Pembrokeshire, Bantry and Dublin Bays, 

 Arran Isle in Galway ; Oban, and west coast of Scotland ; 

 Lerwick Sound, and five miles east of Lerwick, in forty 

 fathoms. (Ann. Nat. Hist.), 



