aughkt.] MOLLUSKS IN THE LACUSTRINE DEPOSITS. 269 



Goniobasls brevispira f Anthony, Otoe County. 



Goniobasis semicarinata Say, Otoe County. 

 Anculosa costata Anthony, Eichardson County. 

 Anculosa praerosa Say, Eichardson County. 

 Anculosa ? -, Eichardson County. 



Unio , Cedar, Dakota, and Burt Counties. 



Unio , Nemaha County. 



Unio , Otoe and Cass Counties. 



Anadonta , Washington County. 



Anadonta , Eepublican Valley. 



