The Shell-Collector’s Handbook. 79 
v.albida (Jeff.): Like v. fragilis, but white in colour. 
Fie. 9—Limnea Stagnalis, Variety APPROACHING L, 
Palustris IN SHAPE. 
LIMNAA PALUSTRIS, MULL. 
SHELL conic-oval, pointed, thick, opaque, varying in colour 
from yellow to dark violet brown, strongly striated in line 
of growth; whorls six to seven, convex, the last whorl 
occupying two-thirds the length of the shell; spire pro- 
duced, ending in an acute apex; suture rather deep, 
circled by a narrow white line; mouth ovate, outer lip 
marked with brown or violet, inner lip expanded, and 
partially covering the slight umbilicus. Maximum length 
2 inch. Animal yellow-brown or cinereous, mottled with 
fine black and yellow spots. 
Habitat.—Ponds, marshes, and lakes. 
v. corva (Gimel.): Shell larger, swollen, opaque, black- 
