VITRINA. 51 
Genus IT.—VITRINA. 
V. PELLUCIDA (transparent). 
Spheroidal, very thin, transparent, green; spire scarcely 
raised ; mouth large. 
The Vitrinas are a link between the slugs and snails 
proper. They have the same tooth formation and 
mantle as the slugs, while their shells resemble those 
of the Helices. 
Our pretty little English species is found in almost 
all parts of the British Isles. This shell, like a bubble 
of clear greenish-tinted glass, is a truly beautiful 
object, especially when set out on white cardboard or 
with a background of cotton wool. Two varieties are 
found, but the shell is very uniform. I have, however, 
a specimen taken in the north of Ireland with two milk- 
white bands running in a spiral direction from apex to 
mouth. 
Under a lens, or even with the naked eye, the ope- 
ration of breathing can be well observed. In autumn, 
winter, and early spring, especially after rain, our little 
friend is abroad on dead leaves and among moss. 
Var. I. depresstuscula. Oval and flatter on both 
sides. 
Var. Il. Dilwynit. Globular, spire produced. 
