SUCCINEA. 49 



plants. The shell is larger and more cylindrical than 

 that of T. haliotidea. 



Family III. H ELIGIBLE. 

 Genus I. SUCCINEA. 



1. S. PtTTKlS (stinking). 



Shell pear-shaped, thin, nearly transparent, glossy, 

 amber colour ; whorls three to four ; spire short ; moirih 

 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 



