OF CONCHOLOGY. 



151 



Great Nemaha River, at 

 Falls City. 

 TJnio anodontoides, Lea. 



" parvus, Barnes. 



" rubiginosus, Lea. 



" zig-zag, Lea. 



" nigerrimus, Lea. 



" Rutersvillemis, Lea. 



" Mississippiensis, Conr. 



" TopeJcaensis, Lea. 

 Vivipara Integra, Say. 



Omaha City. 

 Helix thyroides, Say. 



" alternata, Say. 



" monodon, Rackett. 



" multilineata, Say. 



" profunda, Say. 

 Succinea obliqua, Say. 

 Vivipara integra, Say. 

 Amnicola Cincinnatiensis, Anth. 

 Planorbis bicarinatus, Say. 



" trivolvus, Say. 

 Limncea palustris, Mull. 



