82 HELICIDS. 
which never exceed four, instead of from six to ten, 
as in that species. From V. pygmea 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- 
borgit’ resembles V. antivertigo in form and V. pygmea 
in the number of teeth. It is among the largest of our 
native species of Vertigo.” 
Var. bidentata, “ Labial or palatal teeth wanting.” 
3. V. Mouninstana (after the French conchologist, Des 
Moulins). 
Dr. Jeffreys, writing m 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 distinet from 
V. Lilljeborgit, 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. 
' Written VY. Moulinsiana in “ British Conchology. 
