MOLLUSCA OF OHIO. 387 



fAmnicola lustrica Pilsbry. 



Cuyahoga River; Springfield Lake; Ohio Canal at New 

 Philadelphia (St.). Probably over the state. 

 Amnicola cincinnatiensis (Lea, Cyclostoma). 



Over the state, common in rivers and creeks. 

 fAmnicola walked Pilsbry. 



Geauga Lake, east of Cleveland! (Allen). 

 fAmnicola pilsbryi Walker. X 



Mever's Lake at Canton, Ohio Canal at New Philadelphia 

 ' (St.). 

 fAmnicola nickliniana Lea. X 



Springfield Lake. 

 fAmnicola emarginata Krister, obtusa Lea. 



Lake Erie and tributaries; Ohio canal at Navarre and New 

 Philadelphia (St.). 



fAmnicola sp., undescribed, t. Walker. X 



Lake Erie and Ohio Canal in Stark Co. (St.). [The shell is 

 small and very slender, very different from all other 

 Ohio Amnicola^.] 

 fLyogyrus pupoides (Gould, Valvata). X 

 Springfield Lake (St.). 



valvatid^;. 



Valvata tricarinata Say. 



Over the state, common in all kinds of waters. Forms with 

 one or two keels more or less obsolete are found with 

 typical specimens. 

 Valvata tricarinata simplex Gould. 



Lake Erie at Sandusky (Walker). 



Valvata bicarinata Lea. X 



I have seen no specimens of the typical form from Ohio. 

 Valvata bicarinata depressa Walker. 



Lake Erie at Sandusky and Vermilion (St.). 

 Valvata sincera Say. X 



"Ohio." 

 fValvata lewisi Currier, striata Lewis. X 



Springfield Lake (St.). 



