LAND SNAILS. 133 
HELIX LAMELLATA—(the Plated Snail) (Pl. VIL, 
fig. 51)—is a characteristic northern shell. It 
inhabits woods, on decaying leaves of Luzula 
and fronds of Lastrea, &c., and about rocks near 
running water. It was first discovered near 
Scarborough, and is now known throughout the 
_ North of England, the North and West of Scot- 
land, and the North of Ireland. Until recently, 
this species was peculiar to North Britain, but 
it has been found in North Germany and in 
Sweden. 
This beautiful conical globose shell is only 
one-tenth of an inch high and broad, of greyish 
‘colour; and in certain lights it exhibits a satiny 
appearance, which is due to the action of the 
rays of light upon the fine, sharply-cut striz 
_ which cover its surface. 
Herix acuteata—(the Prickly Snail) (Pl. VIL., 
fic. 48).—This, also, is a minute species, and 
differs especially from the last in the epidermis 
of the shell bemg raised into from twenty to 
thirty plaits, which rise in the middle of each 
whorl to a sharp pomt. Fresh specimens are 
exquisitely beautiful objects, exhibiting the ap- 
pearance of a coronet of bristles encircling each 
whorl. 
This species is so minute, and its colour so 
closely resembles that of the dead leaves upon 
which it is usually found, that it is detected with 
