407 



DoSor PuLTENEYj howcver, obferves he never found 

 it in this laft county. Do61or Lister fays in Herlford- 

 Jkire, about Ware and Puckeridgc. 



We have received it from Kent; and once found a 

 fingle fpecimen near Devizes, in Wilt/lnre ; which, with 

 thofe mentioned in Gloucejlcr/Jiirc, feems to be their fur- 

 thefl northern limits at prefent. 



By fome, it is faid to poffefs a teftaceous operculum ; 

 if fo, it is only prepared for fecurity in the torpid feafon, 

 and is call: off as foon as the animal is reftored to loco- 

 motion : for no fuch appendage is to be difcovered du- 

 ring the fummer months. 



Mod authors, however, fpeak of the operculum di^Wk?^ 

 chalk or plafter ; and that it is compofed of two or three 

 lamince of different degrees of hardnefs ; but not tefta- 

 ceous. That it is not of a flielly nature, there can be 

 no doubt, for in all fuch (hells, furniflied with a teftace- 

 ous operculuvi, it is as much fixed to the animal as any 

 other part, and is never deciduous ; whereas, the ani- 

 mal of the Helix Poviatia, throws off the covering of the 

 aperture of its fliell, as foon as it iffues from its hyber- 

 naculum. 



25. 

 Helix afperfa. Gmel. Syft. p. 3631. 5S. Aspersju 



MulkrVem. ii. p. 59. No. 253. 



Helix 



