376 OHIO STATE ACADEMY OF SCIENCE. 



Polygyra albolabris (Say, Helix). 



Over the state, common and variable. On the lake islands 

 (Put-in Bay, Kelley's) Allen found a reddish form, 

 constant, in the marshy lowlands; minor Sterki, form or 

 var., at New Philadelphia (St.). 

 Polygyra zaleta (Binney, Helix), exoleta. 



Columbus; Cincinnati; Medina and Defiance Counties (St.); 

 Put-in Bay and Kelley's Islands, uplands (Allen); 

 probably over most of the state, yet wanting over wide 

 stretches, e. g. not found in Tuscarawas Co. 

 Polygyra thyroides (Say, Helix). 



Over the state, common in most parts. 

 Polygyra clausa (Say, Helix). 



Cincinnati; Columbus; Lorain Co., cited as rare, by Dr. 

 Hubbard, in litt., 1858. 

 Polygyra mitchelliana (Lea, Helix). 



Cincinnati; Columbus; Portage Co. (Dean, Streator) ; 

 Harrison and Tuscarawas Counties (St.) ; Defiance (St.) 

 Polygyra pennsylvanica (Green, Helix). 



Cincinnati; Columbus; Cuyahoga Co. (Allen); Tuscarawas 

 Co. (St.); probably over the state. 

 Polygyra elevata (Say, Helix). 



Cincinnati; Columbus; Defiance (St.); probably over at 

 least the southern and western parts of the state. 

 Polygyra dentifera (Say, Helix). X 



Cincinnati (Byrnes); "Ohio," t. W. G. Binney. 

 Polygyra appressa (Say, Helix). 



Cincinnati. 

 Polygyra obstricta (Say, Helix). X 



Cited from the state (W. G. Binney) ; I have seen no 

 specimens. 

 Polygyra palliata (Say, Helix). 



Over the state; albinos are found occasionally. 

 Polygyra inflecta (Say, Helix i. 



Over the state. 

 Polygyra fraudulenta Pilsbry, Helix, Triodopsis fallax auctt. 



Over the state, common. 

 Polygyra tridentata (Say, Helix). 



Over the state, common and variable. Specimens ,from 

 various places have the peristome without teeth, or 

 with mere traces of such, but do not constitute a 

 variety. 

 Polygyra tridentata discoidea Pilsbry. 



Cincinnati. 

 Polygra stenotrema (Say, Helix.). 



Cincinnati. . • 



