THE NAUTILUS. 77 



Ancylus rivukiris Say. In ponds and rivers. 



Physa gyrina Say. In springs and creeks throughout southern 

 Kentucky and at Lexington. 



Physa pomilia Con. In ponds. Not uncommon. 



Physa heterostropha Say. Barren River. 



Physa heterostropha, var. Creeks. 



Campeloma obesum Lewis (?). Barren River. 



Campeloma integrum Say. Barren River. 



Campeloma ponderosum Say. Common. 



Lioplax subcarinata Say. 



Poniatiopsis lapidaria Say. Bank of Barren River. 



Pleurocera filum Lea. Very common. 



Pleurocera sycamorense Lea. 



Pleurocera undulatum Say. 



Lithasia planispira Anthony. 



Lithasia nuclea Lea. 



Lithasia undosa Anth. 



Lithasia obovata Say. 



Goniobasis curvilabris Anth. 



Goniobasis curvilabris, var. Rather common. 



Goniobasis abreviata Lea. 



Goniobasis curreyana Lea. Common. 



Goniobasis costifera Hald. Green and Barren Rivers. 



Goniobasis costifera, var. 



Goniobasis vicina Anth. Warren county. 



Goniobasis atJileta Anth. Barren county. 



Goniobasis depygis Say. 



Goniobasis nassula Con. var. Indian Creek. 



Goniobasis infantulum Lea. 



Go?iiobasis saffordii Lea. Indian Creek. 



Goniobasis edgariana Lea. Creeks. 



Goniobasis elegantula Anth. Barren River. 



Goniobasis pauper aula Lea. 



IXlONIDiE. 



Quad,/'/, i undulata Barnes. Common in all streams. 

 Quadrula trigona Lea. Common. 

 Quadrula rubiginosa Lea. 

 Quadrula pyramidata Lea. 



