151 



Angiirema nupera Say. "W abash river. 



=Angitrema verrucosa Say. 

 Angitrema verrucosa Say. AVabash and Ohio rivers. 

 Goniobasis bicolorata Anthony. Camp creek, Madison. 

 Goniobasis consangulnea Anthony. "Indiana." 

 It is probable that a no more satisfactory author than this one ever 

 wrote on American shells. Exact localities are rarely ever men- 

 tioned by him, and most of those given are open to serious question. 

 He was notorious for looseness in this very important matter. 

 Rarely can his references be used for geographic distribution. 

 Goniobasis cubicoides Anthony. Wabash river. 

 Goniobasis dei^ygis Say. Falls of the Ohio. 

 This is one of the most abundant shells at the falls, and at low water 

 may be secured by the gallon with very little efibrt. 

 Goniobasis infantula Lea. Falls of the Ohio. 



=Goniobasis depygis Say. 

 Goniobasis informis Lea. Falls of the Ohio. 

 Goniobasis interlineata Anthony. Christy creek. 



=Goniobasis semicarinata Say. 

 Goniobasis Intersita Haldeman. ■ Swan creek. 

 Goniobasis louisvillensis Lea. Falls of the Ohio. 



^=Lithasia obovata Say. 

 Goniobasis kirtlandiana Lea. " Indiana." 

 = Goniobasis bicolorata Anthony. 

 ^Goniobasis semicarinata Say. 

 Goniobasis semicarinata Say. Richmond; Franklin Co. 

 Goniobasis spartenbergensis Lea. Wabash river. 



=Goniobasis depygis Say. 

 Lilhasia obovata Say. Wabash river ; Falls of the Ohio. Very abundant at 



the last locality. 

 Meseschiza grosvernorii Lea. Wabash river. Pathologic form. 

 Pleurocera anthonyi Lea. "Fox river, Indiana." 

 There is considerable uncertainty about this locality reference. Fox 

 river is in Illinois. 

 Pleurocera canaliculatum Lea. Falls of the Ohio. 



A very abundant and exceedingly variable shell. 

 Pleurocera elevatum Say. Ohio river. 

 Pleurocera moniliferum Lea. Wabash and Ohio rivers. 



