= Slee 
Hygromia striolata (Pfeiffer) 
Pilate Jf) 41 
This species is similar to Monacha cantiana, but is smaller; adults (with 
5-6 whorls) measure 10-11 mm. in diameter,are more depressed, and 
have obtusely angular whorls. The periphery is often marked by a pale 
band. The young shell is covered with fine hairs but these tend to be lost 
as it grows older. 
Distribution: Central Europe, France, England. - Introduced into Canada 
and Massachusetts. 
Hygromia hispida (Linnaeus) 
Plates... J 
Shell similar to H, striolata, but smaller, with rounded whorls, and often 
retaining its hirsuteness in adult shells. Adults (with 5-6 whorls) meas- 
ure 7-9 mm. in diameter, 
Distribution: Europe, central Asia to Siberia. Introduced into Canada and 
Maine. 
Hygromia cinctella (Draparnaud) 
Figure 23, °C" 
Shell medium to small, thin, perforate to imperforate, smooth and conic 
with a keeled periphery. Horn-colored to light brown. The lip is sharp 
and not reflected. Adults (with 5-6 whorls) measure 12-13 mm, in dia- 
THETCT. 
Distribution: Central and southern Europe. 
Family HELICIDAE 
The Helices comprise medium to large snails of European origin and in- 
clude the edible snails Helix aperta, H, pomatia, H, aspersa, Otala lactea, 
and O, vermiculata, The shell in this family is usually banded, generally 
wider than high and loosely coiled so that the central column is hollow or 
umbilicate. However, in the adult the umbilicus is often closed over by an 
expansion of the lip. Genera of economic importance are Helix, Cepaea, 
Otala, Helicigona, and Theba. One species, Cepaea hortensis, is wide- 
spread along the coast of northeastern North America; it is found from 
Newfoundland to Massachusetts. 

