114 



ern Illinois, Illinois River (Calkins); La Salle Co. (Calkins, 

 Huett) ; Joliet, Will Co. ( Ferriss, Handwerk) ; Washington and 

 Hardin counties (Hinkley) ; Mercer Co. (Marsh); Elgin, Kane 

 Co.; Algonquin, McHenry Co. (Nason) : Starved Rock, La Salle 

 Co. (Oakes); Fulton Co. (Wolf); Herod, Pope Co. (State 

 Laboratory). 



Succinea nuttalliana Lea. 



Rockford, "Winnebago Co. (Hinkley): Fulton Co. (Wolf). 



Succinea higginsi Bland. 



Rock Island Co. (Marsh). 



Succinea concordialis Gould. 



Du Bois, Washington Co. (Hinkley). 



Succinea grosvenorii Lea (=mooresiana Lea). 

 Canton, Fulton Co. (Nason, Wolf). 



Succinea a urea Lea. 



Effingham Co. (Marsh). 



Succinea illinoisensis Wolf. 



Canton, Fulton Co. (Handwerk); Fulton Co. (Marsh). 



SIGMURETHRA. 



Superfamily Holopoda. 

 Family HELICLD^E. 



Subfamily POLYGYRIN^. 



Genus Polygyra (Say) Pilsbry. 

 Section Polygyra s.s. 



Polygyra leporina Gould. 



Jackson and Hardin counties (Hinkley) ; Jackson Co. (Marsh). 



Section Triodopsis Rafinesque. 



Polygyra tridentata Say. 



Near Berry Lake, Chicago, Cook Co. (Higley) : Hancock Co. 

 (Marsh) : Southern Illinois (Ulffers) ; Golconda, Pope Co. (State 

 Laboratory). 



Polygyra tridentata juxtigens Pilsbry. 



La Salle Co. (Calkins) ; Cook Co. (Higley). 



Polygyra fraudulenta Pilsbry (= fallax of authors, not of Say). 



La Salle Co. (Calkins) ; Lemont, Cook Co. (Higley ) ; Pope 

 and Hardin counties (Hinkley) ; Union Co. (Lyon) ; Grand 



