146 



FRESH WATER UNIVALVES. 



Ancylus tardus Say. Wabash river. 



ViviPARA suBPURPUREA Say. Wabash river. 



Campeloma ponderosum Say. Ohio river. 



Pleurocera canaliculatum Say. Falls of the Ohio. 



Pleurocera moniliferum Lea. New Harmony. 



Pleurocera anthonyi Lea. Fox river, " Indiana." 



Pleurocera troostii Lea. Near New Harmony. 



Lithasia obovata Say. Wabash and Falls of the Ohio. 



Angitrema verrucosa Say. Wabash river. 



Angitrema armigera Say. Wabash river. 



Melania nupera Say. Wabash river. 



^Angitrema verrucosa. Wabash river. 



Anculosa pr.erosa Say. Falls of the Ohio. 



Anculosa trilineata Say. Falls of the Ohio. 



GoNiOBAsis DEPYGis Say. Falls of the Ohio. 



Goniobasis intersita Haldeman. Swan creek. 

 This species was based on specimens furnished by Mrs. Say after the 

 death of her husband. 



Goniobasis consanguixea Anthony. " Indiana." 



Goniobasis bicolorata Anthony. Camp creek, near Madison. 



Goniobasis cubicoides Anthony. Wabash river. 



Goniobasis infantula Lea. Falls of the Ohio. 



Goniobasis louisvillensis Lea. Falls of the Ohio. 



Goniobasis interlineata Anthony. Christy creek. 



Goniobasis spartanburgensis Lea. Wabash river. 



Goniobasis informis Lea. Falls of the Ohio. 



Goniobasis kirtlandiana Lea. " Indiana." 



=GoNiOBAsis semicarinata Say. Richmond. 

 =Goniobasis bicolorata Anthony. Camp creek. 



Mesesciiiza grosvenorii Lea. Wabash river. 

 This genus is now recognized to have been based upon pathologic speci- 

 mens of a Gonlohcms, probably Ooniobasis cublcoldes Anthony. The 

 specimens were not only pathologic but immature. The writer has 

 several times, in streams in the South, noted many specimens of 

 traumatic shells which might easily be referred to this genus. 



