Ton d-sn ails 



17 



Ear Pond-snai 



animal is yellow or brown witli a greenish tinge, 

 dotted with black and white. The tentacles are 

 broad and diverging, and the eyes 

 small. The foot is bordered with 

 yellow. The j^ellowish shell is semi- 

 transparent and glossy, bearing in 

 addition to the distinct lines of growth 

 delicate spiral ridges. The body-whorl 

 accounts for quite five-sixths of the 

 entire shell. The umbilicus is repre- 

 sented by a slight cleft. It is an inhabitant of 

 stagnant and sluggish waters, where it usually keeps 

 near the bottom and exhibits little activity, only 

 occasionally swimming at the surface. One little 

 characteristic may help the observer to distinguish 

 smaller specimens from some of the varieties of other 

 species. Limn^ids usually carry their shells with 

 the spire pointing backwards, but aiiricidaria 

 carries its shell with the spire at right angles with 

 the body and the outer lip well covering the back 

 and head, leaving the tentacles above exposed. 

 The shell is a little more than 1 inch in leno-th, 

 and a little less than 1 inch in breadth. It is 

 quite a local species, and though widely 

 distributed in England and Wales, its 

 occurrence in Scotland and Ireland is very 

 limited. 



The Wandering Pond-snail (Z. _2:>^7'f^7^a) 



is the second of those whose shell is nearly 



all body-whorl, though here it accounts 



for only three-fourths of the whole. The 



animal is yellow-grey tinged with green and black 



and speckled with whitish and black specks. The 



