Section Vertiiioj>s<is! (Coekerell) Sterki. 

 Blfiilar'ui tftppaniana C. B. Adams ( —peiitotlon of autliors, not of 

 Say I . 

 ("ook Co. (Baker, .lenseu) : Noitlieni Illinois (Calkins) : La 

 Salle Co. ( ( 'alkins, Huett) : Stark Co. ( Chase ) : Joliet, Will ( "o. 

 (Ferrissi: Washington and Winnebago counties (Hinkley); 

 Will and Fulton counties ( ilarsh ) : Canton, Fulton Co. ( Nason). 

 B'ilidaria pentodon Say ( =curvidens Gould). 



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

 Joliet, Will Co. (Ferriss, Handwerk ): Eastern Illinois (^larsli). 

 Bttidarid jientodoH iJoridaaa Dall. 



Huntley, McHenry Co. (Ferriss). 



(tcuus Pupilla Leach. 

 PupUla nutsconim Linne. 

 Mercer ("o. (Marsh). 



Genus Vertigo Draparnaud. 

 Subgenus Anyustula Sterki. 

 Vertigo milium (rould. 



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

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

 Fulton Co. (Nason, Wolf). 



Subgenus Vertigo Draparnaud. 

 Section ^'ertig(^ s.,«. 

 Vertigo nrata Say ( = Zonites iipnoni Calkins). 



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

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

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

 Vertigo rentrieosa Morse. 

 niinois (l'ilsl>ry I. 

 Vertigo reiitricOfia approj-iniato Sterki. 



Winnebago Co. (Marsh). 

 Vertigo youldi Binney. 



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

 Vertigo tridentatd Wolf. 



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

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

 Fulton Co. ( Marsh). 



