134 
LAND AND ERESH-WATER MOLLUSKS. 
difficulty, and it is advisable to lift the leaves 
and turn them over in the hand to find it. In 
Gloucestershire it is found on the under sides of 
the leaves of the hazel; it is occasionally seen 
on liver-worts ( Jungermannice ). H. aculeata is 
distributed throughout Britain and Europe. 
Helix pomatia —(the Apple Snail) (PI. Till., 
fig. 73).—This snail is commonly regarded as 
the one which was held in so great repute by 
the epicures of ancient Greece and Rome; but 
this is not the fact, for a larger species replaces 
H. pomatia in Southern Europe. In the North 
of France and in Switzerland the Apple Snail, 
however, is a much-prized mollusk as an article 
of diet. 
The shell of this species, the largest of our 
British snails, is globular, thick, and strong, of 
a yellowish-white, with spiral bands of brown ; 
it is as much as two inches in breadth and 
height; the whorls are five in number, the last 
one extremely large and inflated. 
This, the largest snail, possesses the greatest 
number of teeth among the 
Helicidce , and they are only 
exceeded in number by those of 
the Limaces ; ^th'e number is 
01 T , „ 21,140, contained in 140 rows 
pomatia. 0 f 151 each. The jaw (fig. 21) 
is strongly arched, with a moderate number of 
