LAND SNAILS. 
131 
in Scotland, and lias not yet been found in Ire¬ 
land. It is distributed throughout the temperate 
parts of Europe. 
It lives in moist woods, damp places on the 
banks of streams, among the grass and rushes or 
under the leaves of Petasites vulgaris . 
Helix eusca —(the Brown Snail) (PI. VII., 
fig. 50).—The shell of this species is of a glossy 
amber-colour, and is especially characterized by 
its strong, irregular, transverse wrinkles, and 
its extreme thinness and fragility. It has a 
minute umbilicus, like H. sericea , but the spire 
is more depressed, and the last whorl propor¬ 
tionately large. The height is a quarter of an 
inch, the breadth three-eighths. 
In the northern parts of Great Britain this 
snail is common, in damp shady places and 
wooded mountain glens ; on the fallen leaves of 
trees in the autumn, and in the summer upon the 
young trees of the sycamore and alder. It is a 
hardy species; for in the damp woods in the neigh¬ 
bourhood of Belfast I have frequently collected 
it in great numbers, during the winter months, 
gliding rapidly over the leaves of the wood-rush 
(Luzula sylvatica ), to which it is very partial; 
it has occurred to me under similar circumstances 
in the glens of the lake districts of Scotland. 
It is very rare in the South of England; and on 
the Continent has hitherto only been found near 
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