96 THE NAUTILUS. 



Succinea avara Say. Not common. 



Succinea grosvenori Lea. Found in colonies in wet places. 



Succinea rusticana Gould. Generally distributed, but it has not 

 been found common. • 



Succinea stretchiana Bland. This is our common Succinea. 



Carychium exile Lea. A colony of this species was found near 

 the top of Blue Mound. 



Helicina occulta Say. Drift specimens have been found at Law- 

 rence in a situation that would lead one to suspect that it is a 

 resident. 



Lymnea techella Haldeman. Abundant in a drainage ditch south 

 of Lawrence. 



Lymnea columella chalyhea Gould. Found in the Whitcomb 

 greenhouse at Lawrence on the sides of flower-pots. 



Lymnea dalli Baker. Found in the greenhouse with L. columella 

 chalybea and also in river drift. 



Lymnea elodes Say. One drift specimen is from Lawrence. 



Lymnea obrussa Say. Rather common in a watercress spring 

 west of Lawrence. 



Lymnea parva Lea. Only a few specimens from river debris have 

 been found. 



Lymnea reflexa Say. This form used to be very common in Lake 

 View, but the flood of 1903 swept almost all away. 



Lymnea reflexa crystalensis Baker. Not common in this county. 



Planorhis bicarinatus Say. Lake View and Rock Creek. 



Planorbis trivolvis Say. Abundant in all ponds. 



Planorbis dejleclus Say. Lake View. 



Planorbis parvus Say. A few specimens were found along the 

 Kansas River. 



Physa anatina Lea. 



Physa oleacea Tryon. These two species were identified by 

 Mr. Bryant Walker. All the specimens of this county seem refer- 

 able to them. 



Amnicola cincinnatiensis Lea. Found in mud creek commonly. 



Amnicola limosa Say. A single dead shell from the Kansas 

 River. 



Campeloma decisum Say. 



Campeloma subsolidum Anthony. These two forms live abund- 

 antly in the Wakarusa Creek, but are easily distinguishable. 



