102 



Co. (Walker) ; Fulton Co. (Wolf) ; Havana, Mason Co. (State 

 Laboratory). 

 Ancylus haldemani Bourguignat. 



Quiver Lake and Illinois River, Havana, Mason Co. (State 

 Laboratory). 



Ancylus pumihis Sterki. 



Rockford, Winnebago Co.; Kankakee River (Walker). 



Ancylus shimehii Pilsbry. 



Salt Fork, Urbana, Champaign Co. (State Laboratory). 



Ancylus sp.* 



Genus Gundlachja Pfeiffer. 



G undlach ia m eekiana Sti mpson . 



Rock Island Co. (Marsh, Pilsbry). 



Gundlachia sp. 



Quiver Lake, Havana, Mason Co. (State Laboratory). 



Family LYMN^EID^E. 



Subfamily LYMN^INjE. 



Genus Lymncea Lamarck. 

 Subgenus Lymncea Lamarck. f 

 Section Lymnsea s.s. 



Lymncea stagnalis appressa Say ( = jugularis Say). 



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

 (Calkins) ; Desplaines River (Ferriss, Handwerk) ; Romeo, Will 

 Co. (Handwerk): La Salle Co. (Huett, for stagnalis) ; Lake 

 Co. (Marsh) ; Silver Lake and Algonquin, McHenry Co. (Nason ) ; 

 Cedar and Fourth lakes, Lake Co. ; Chicago. Cook Co. (State 

 Laboratory ) . 



Section limlix Montfort. 

 Lymnaa auricula ria Linne. 



Greenhouse, Lincoln Park, Chicago, introduced (Baker, 

 Nason). 



* Ancylus shimehii Pilsbry as quoted by Baker from Joliet and by Pilsbry from Rock 

 Island, is said by Mr. Bryant Walker to be an undescribed species. 



\Lymnsea emarginata Say is reported from Southern Illinois by Ulffers, but tins 

 would seem to be an error, as no authentic specimens of this species from Illinois 

 have been seen by the writer. 



