341 



the bafe behind the pillar lip is a fingular and large ca- 

 vity, formed by the contra6iion of the throat, or interior 

 Dart of the mouth, and the greatly expanded lips; the 

 nargin of the aperture does not quite meet upon the 

 •ody whirl. Length rather more than a quarter of an 

 nch; breadth not half its lengrth. 



This appears to be a rare (hell, or at lead extremely 



3cal in England. We firfl found it, very fparinglj,^ on 



lU old moffy wall at Kajlon Grey in WiltJJdre, ten or 



welve years ago; and never fince till lately, when we 



difcovered confiderable abundance at the roots of juni- 



ber bufhes, on the fides of the hills, near Devizes, in the 



fame county. 



Chemnitz has given a tolerably good figure of this 

 fhell, but too large; and likens it to the T.mufcorum, 

 but that it is not pellucid, is (harper pointed, with nine 

 fpires; and has the mouth befet with teeth: and alfo ob- 

 ferves, that Schroeter remarks, it is not uncommon 

 in Tliuringia. Indeed it appears to be from the latter 

 author, that the former obtained liis knowledge of the 

 fhell; but unfortunately has jumbled with it the Turbo 

 tridens, by quoting the Helix tridens of Muli.er. 



Gmelin has alfo fallen into this error, by quoting 

 Chemnitz's I'hell for his T. tridens. 



SCHRO- 



.fplrally backwards. In a parallel direSion to each other: tbofc on the exterior 

 lip may in moft inftances be traced through the outride of the fliel!, and arc 

 nearly a line in length. 



