162 LAND AND FRESH-WATER MOLLUSKS. 
such places, the shell is always free from dirt 
and has a bright glossy lustre. 
Vertigo Moulinsiana (Pl.X., fig. 105), named 
after M. des Moulins, a French conchologist, by 
the Abbe D. Dupuy. It is one of the most 
recent additions to our land shells. This acquisi¬ 
tion to the British mollusca was made by Mr. J. 
G. Jeffreys in 1845, but not until the last few 
years was this discovery published. The only 
British locality is Ballinahinch, near Round- 
stone, co. Galway, where it inhabits under stones 
by the side of a small lake at the fore-mentioned 
place. It is local and rare in Central Europe. 
The affinities and differences here given of the 
shell of this species are quoted from the above- 
named author :—“ The species differs from F. 
antivertigo in being larger, more ventricose/ in 
the mouth and lip not being contracted, and 
especially in the number and position of the 
teeth, which never exceed four. From V.pygmcea 
by being twice the size and very much more 
ventricose. F. Moulinsiana resembles F anti¬ 
vertigo in form, and F. pygmcea in the number of 
teeth. It is among the largest of our native 
species of Vertigo ” 
Vertigo substriata — {the Six-toothed Whorl 
Shell) (PI. X., fig. 104).—The shell of this species 
is somewhat fusiform, strongly striated trans¬ 
versely, and of a yellowish-horn colour; the 
