110 LAND AND FRESH-WATER MOLLUSKS. 
that preceding it; umbilicus moderately large; 
aperture oblique, crescent-shaped, broader than 
high; diameter from one-twelfth to one-sixth of 
an inch. 
Helicella nitida— {the Glossy Snail) (PI. VII., 
fig. 54).—The shell is flattened, with the spire 
somewhat raised, more so than in H. nitidula , of 
a greyish-brown colour, glossy and semi-trans¬ 
parent, rather strongly transversely wrinkled; 
there is no whiteness or opacity beneath; whorls 
five; the umbilicus large and deep; aperture 
oblique, roundish, longer than broad; diameter 
three-twelfths of an inch; height nearly half 
the breadth. 
The animal is bluish-black, and the shell when 
it contains the body appears of a dark chocolate- 
brown. This species differs from H. nitidula in 
its greater convexity, stronger striations, wider 
umbilicus, and in being destitute of an opacity 
underneath. 
It is not a common species, inhabiting moist 
places among herbage, on the margins of muddy 
streams, ditches, and marshy places. 
Helicella eulva —{the Fulvous Snail) (PI. 
VII., fig. 56).—This species is easily recognized 
by its conical shell with a shallow ill-defined 
umbilicus. The shell is thin, glossy, semi¬ 
transparent, and horn-coloured, as in the other 
Helicellce. 
