112 



Section Vertigopsis (Cockerell) Sterki. 



Biiidaria tappaniana C. B. Adams (=pentodon of authors, not of 



Say ) . 



Cook Co. (Baker, Jensen); Northern Illinois (Calkins) ; La 



Salle Co. (Calkins, Huett) ; Stark Co. (Chase) ; Joliet, Will Co. 



(Ferriss); Washington and Winnebago counties (Hinkley); 



Will and Fulton counties (Marsh) ; Canton, Fulton Co. (Nason). 



Bifidaria pentodon Say ( =curvidens Gould). 



Cook Co. (Baker, Jensen) ; Ottawa, La Salle Co. (Calkins) ; 

 Joliet, Will Co. (Ferriss, Handwerk ); Eastern Illinois (Marsh). 



Bifida via pentodon Uoridana Dall. 



Huntley, McHenry Co. (Ferriss). 



Genus Pupilla Leach. 



Papilla muscorum Linne. 

 Mercer Co. (Marsh). 



Genus Vertigo Draparnaud. 



Subgenus Angustula Sterki. 



Vertigo milium Gould. 



Washington and Winnebago counties (Hinkley, Marsh); El- 

 gin, Kane Co.; Algonquin, McHenry Co. (Nason); Canton, 

 Fulton Co. (Nason, Wolf). 



Subgenus Vertigo Draparnaud. 



Section Vertigo s.s. 



Vertigo ovata Say ( = Zonites upsoni Calkins). 



Rockford, Winnebago Co. (Calkins, Hinkley); Joliet, Will 

 Co. (Ferriss, Handwerk) ; Winnebago Co. (Marsh) ; Algonquin, 

 McHenry Co. : Canton, Fulton Co. (Nason) ; Fulton Co. (Wolf). 



Vertigo ventricosa Morse. 

 Illinois (Pilsbry). 



Vertigo ventricosa approximata Sterki. 

 Winnebago Co. (Marsh). 



Vertigo gouldi Binney. 



Rockford. Winnebago Co. (Hinkley): Will Co. (Marsh). 



Vertigo tridentata Wolf. 



Joliet, Will Co.; Utica, La Salle Co. (Ferriss, Handwerk) ; 

 Canton, Fulton Co. (Gratacap, Hinkley, Marsh, Nason, Wolf) ; 

 Fulton Co. (Marsh). 



