NORTH AMERICAN CONCHOLOGY. 



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Name. 

 Pisidium abditum Ilald. 



ferrunginium Prime. 

 Limnae caperata Say. 



desoidosa Say. 



humilis Say. 



reflexis Say. 



umbrosus Say. 



. ? 



Physa ancilliara Lea. 



elongata Say. 



gyrina Say. 



heterostropha Say. 

 Planorbis armigerus Say. 



campanulatus Say. 



bicarinatus Say. 



dilitatus Gould. 



parvus Say. 



lentus Say. 



trivolvis Say. 

 Ancylus tardus Say. 



Paludina declsa Say. 



genicula Conrad. 



integra Say. 



P. heterostropha Kirtland. 



rufa Ilald. 

 Amnicola limosa Say. 



lapidaria Say. 



Sayana Anthony. 

 Valvata tricarinata Say. 

 Melania depygis Say. 



inornata Anthony. 



gracilor Anthony. 



exilis Ilald. 



Kirtlandiana Lea. 



regularis Lea. 



pulchella Anthony. 



Sayii I Vard. 

 Anculosa isogonia Say. 

 Zua lubricus Say. 

 Succinea avara Say. 



ovalis Say. 



obliqua Say. 



vermetus Say. 

 Pupa armifera Suy. 



Locality. 

 Ohio canal. 

 Ohio canal. 

 Swamp ditches. 

 Swamp ditches. 

 Scioto riv., Ohio can., &c. 

 Swamps. 

 Swamps. 

 Swamps. 

 Scioto river. 

 Swamp ditches. 

 Scioto river. 



Scioto riv., Ohio can., &c. 

 Swamp ditches. 

 Scioto river. 



Scioto river & Ohio canal. 

 Swamps. 



Ohioca'l, swamp ditches. 

 Scioto river. 



Scioto swamps, Ohio ca'l. 

 Scioto river & Ohio canal. 

 Scioto river. 



Scioto river & Ohio canal. 

 Scioto river & Ohio canal. 

 Scioto river & Ohio canal. 



Scioto river & Ohio canal. 



Ohio canal. 



Moist places. 



Moist places. 



Ohio canal. 



Scioto river. 



Scioto river & Ohio canal. 



Scioto river. 



Scioto river. 



Scioto river. 



Scioto river. 



Scioto river. 



Scioto river. 



Ohio canal. 



Rocky places. 



Moist places. 



