150 



Zonites limatulus Ward. Indianapolis ; generally distributed. 



Register of Fresh Water Univalves. 

 Carychi'um exiguum Say. In all damp places under leaves. 



This is one of the most minute of American shells. 

 Ancylus tardus Say. Wabash, White and Ohio rivers. 

 Bidinus iiypnorum Linnaeus. Indianapolis ; northern Indiana. 

 Helisoma bicarinatus Say. Indianapolis. 



Planorbis trivolvis Say. Indianapolis; generally distributed over the state. 

 Limnophysa columella Say. Credited to Indiana. 

 Limnophysa caperata Say. Indianapolis ; Wabash river. 

 Limnophysa desidiosa Say. Indianapolis ; generally distributed over the 



state. 

 Limnophysa humilix Say. All over the state. 

 Limnophysa palnstris Muller. Generally distributed. 

 Limnophysa reflexa Say. Indianapolis. 

 Menetus exacutus Say. Generally distributed in ponds. 

 Physa gyrina Say. All over the state. 

 Physa heierostropha Say. All over the state. 

 Valvata tricarinata Say. Credited to the state. 

 Somatogyrus isogonus S&y. White river ; Wabash river. 

 Pomatiopsis lapidaria Say. Wabash river. Probably generally distrib- 

 uted. 

 Campeloma apertum Lewis. (Ms.) West Fork AVhite river. 



=^Campeloma integrum DeKay. 

 Campeloma decisum Say. St. Joseph river. 

 Campeloma integrum DeKay. St. Joseph river. 

 Campeloma ponderosum Say. Wabash and Ohio rivers. 

 Campeloma rufum Haldeman. St. Joseph and White rivers. 

 Campeloma regularis Lea. Ohio river. 



=Junior C. p)onderosum Say. 

 Campeloma subsolidum Anthony. Wabash river. 

 Lioplax subcarinata Say. Laporte. 

 Vivipara contectoides Binney. Wabash river. 

 Vivipara subjyurpurea Say. Wabash river. 

 AnaUosa prasrosa Say. Falls of the Ohio. 

 Anculosa trilineata Say. Falls of the Ohio. 

 Angitrema armigera Say. Wabash river. 



