84 



tion circular ; septa not very widely separated, concave on 

 the outer side ; siphuncle small, and located about half 

 way between the centre and the dorsum ; body whorl 

 expanded a little laterally, and apparently becoming sub- 

 angular on the sides, transverse section slightly oval ; sur- 

 face unknown. 



Locality — Near mouth Smoky Hill fork, Kansas River. 



