312 PYRAMIDELLID7E. 



scarcely occupies a fifth of the total length, is of a suboval 

 or subrhombic-oval shape, moderately contracted above, 

 and rather narrowly rounded and sometimes a little pi*o- 

 duced below. 



The nearly straight and elongated pillar (which, never- 

 theless, is slightly tortuous) forms an obtuse angle with the 

 moderately slanting and somewhat convex base of the penult 

 turn. The outer lip is simple, acute, a little arched, and 

 neither expanded nor prominent. The pillar lip is reflected, 

 and though narrow not particularly so. The axis is imper- 

 forate. An ordinary sized individual measured the sixth 

 of an inch in length, and half a line across at the base ; 

 the one we have figured is rather larger. 



It is a rare and deep water shell. The following loca- 

 lities are attributed to it in Mr. JefFreys' Monograph — 

 Dartmouth, Exmouth, Torquay, and Burrow Island in 

 South Devon ; Whitburn ; Tenby ; Birterbuy Bay and 

 Arran Isle in Galway ; Bantry Bay ; Loch Fyne, and 

 other parts of the West of Scotland ; Zetland, five miles 

 east of Lerwick in forty fathoms water. 



A variety is taken at Plymouth, the Scilly Isles, and 

 Stornaway which is shorter and more solid than the typical 

 form ; its whorls are quite planulate, consequently the 

 upper portion of the outer lip is straight, as in the pre- 

 ceding shell, to which, indeed, it approaches so closely in 

 character that were it not for its more slender shape, and 

 less peculiarly short volutions, we should have been tempted 

 to annex it to that species. 



The more conical form of Scill(£^ its remarkably short 

 volutions, the more abrupt basal declination of its body- 

 whorl, and its straighter and shorter columella seem the 

 more striking distinctive features of that larger species. 



