ACGnEx] MOLLUSKS IN THE LACUSTRINE DEPOSITS. 269 



Goniobasis brevispira ? Anthony, Otoe County. 

 Goniohasis seinicarinata Say, Otoe County. 

 Anculosa costata Anthony, Eichardson County. 

 Anculosa praerosa Say, Eichardson County. 



Anculosa f -, Eichardson County. 



JJnio , Cedar, Dakota, and Burt Counties. 



Uriio , Nemaha County. 



Unio , Otoe and Cass Counties. 



Anadonta , Washington County. 



Anadonta , Eepublican Valley. 



