386 OHIO STATE ACADEMY OP SCIENCE. 



Goniobasis brevispira Anthony. 



Gambier, Knox Co. (Walker). 

 Goniobasis exilis Haldeman. 



Scioto River (Walker). 

 Goniobasis laqueata Say. 



"Ohio" (Walker). 



Other species (?) listed from Ohio: 



Goniobasis gibbosa Lea. 



Goniobasis haldemani Try on. 



Goniobasis infantula Lea. 



Goniobasis lithasioides Lea ( = var. of HvescensT). 



Goniobasis ohioensis Lea. 

 Lithasia obovata Say. X 



Ohio River, up to Marietta (Call.) 

 Angitrema verrucosum Rafmesque. 



Ohio River at Cincinnati. 

 Anculosa costata Lea ( = carinata Bruguiere?). 



Ohio River. 

 Anculosa pr serosa Say. 



Ohio River. 

 Anculosa trilineata Say ( = viridis Lea, syn. or var. ?). 



Ohio River. 



rissoid^e (s. lat., amnicolid^ etc.). 



BITHYNIA TENTACULATA (Linne, Turbo). 



Lake Erie! (Streator) ; Ohio Canal in Stark Co. (St.). Intro- 

 duced from Europe, and now widely distributed over 

 various states. The central part of the operculum is 

 distinctly spiral, not concentric! 

 Somatogyrus subglobosus (Say, Paludina), isogonus Say.* 



Over the state. A form from the Ohio River, at Cincinnati 

 (St.), is rather different and may represent a variety. 

 Somatogyrus integer (Say, Melania). 



Over the state, common. 

 Pomatiopsis lapidaria (Say, Cyclostoma). 



Over the state, common; often far away from water. 

 Pomatiopsis cincinnatiensis (Anthony, Cyclostoma). 



Cincinnati; Columbus. 

 Amnicola limosa (Say, Paludina). 



Over the state, common and variable. 

 Amnicola limosa porata Say. 



Meyer's Lake at Canton (St.). 

 Amnicoia limosa parva Lea. 



New Philadelphia. 



*Some conchologists, e. g. F. C. Baker, regard S. isogonus as distinct 

 from subglobosus. 



