SUCCINEA. 49 
plants. The shell is larger and more cylindrical than 
that of T. haliotidea. 
Family ITI—HE.LIcIDz. 
Genus I.—SuUCCINEA. 
1. S. purris (stinking). 
Shell pear-shaped, thin, nearly transparent, glossy, 
amber colour; whorls three to four; spire short; mouth 
long and open. 
This species is found in moist places by streams and 
ponds crawling on plants. It particularly affects flags 
and withies. The early autumn is the time when it is 
most abundant. Though amphibious it is seldom found 
in the water. Sometimes colourless specimens are met 
with. 
Var. I. subglobosa. Shorter, broader, and more 
solid. 
Var. II. vitrea. Nearly membranaceous. 
Var. III. solidula. Thicker, reddish yellow. 
2. S. ELEGANS (elegant). 
More slender than S. putris, rather thicker, mouth nar- 
‘rower. 
This species appears to merge into the last, and until 
E 
