82 HELICID^. 



which never exceed four, instead of from six to ten, 

 as in that species. From V. pygmcea it may be dis- 

 tinguished by being" twice the size and very much more 

 ventricose, and also of a lighter colour. The difference 

 is equally great between all three species. V. Lillje- 

 borgii* resembles V. antivertigo in form and V.pygm&a 

 in the number of teeth. It is among the largest of our 

 native species of Vertigo" 



Yar. bidentata. " Labial or palatal teeth wanting." 



3. V. MOULINSIANA (after the French conchologist, Des 

 Moulin s). 



Dr. Jeffreys, writing in the " Annals and Magazine 

 of Nat. Hist." for Nov., 1878, says: "The shell of 

 V. Moulinsiana is rather more swollen than that of V. 

 Lilljeborgii, and the labial rib is much stouter." V. 

 Moulinsiana has often an extra denticle. 



V. Moulinsiana, if really specifically distinct from 

 V. Lilljeborgii, approaches it very nearly in form. 

 My figure is an enlargement of a specimen taken at 

 Hitchin, which a friend was kind enough to lend me. 



This rare shell has been found in Hertfordshire and 

 also in Hampshire. 



1 Written V. Moulinsiana in " British Conchology. 



