]02 



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

 Laboratory ) . 

 Anri/lus haldeiiunn Bourguignat. 



Quiver Lake and Illinois River, Havana, ]\Iason Co. (State 

 Laboratory). 



Ancylus pum iliis Sterki. 



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



Ancylus shirnekii Pilsbry. 



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



Ancylus sp.* 



Genus Gundlachia Pfeiffer. 

 Guiidlachia ittecJiiana Stimpson. 



Rock Island ('o. (Marsh, Pilsbry). 



Gundlachia sp. 



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



Family LYMNtEID^. 



Subfamily LYMNiEINiE. 



Genus Lywn^ea Lamarck. 

 Subgenus Lyinna'a Lamarck. f 

 Section Lymnnn s.s. 

 Lyrnmvd stagnaltx apprvssa Say ( = jn<iul(iris Say). 



Cook (!o. (Baker, ('alkins, Jensen, Nason); Nortiiern Hlinois 

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

 Co. ( Handwerk ) ; La Salle (!o. (Huett, for stagiialls)\ Lake 

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

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

 Laboratory ) . 



Section Radix Montfort. 

 Lynm.a-a auricularia Linne. 



Greenhouse, Lincoln Park, Cliicago, introduced (Baker, 

 Nason). 



*Aiiriilii>i sjiiiiiikii Pilsbry as (luot.ed l)y Baker from .Toliet and by Pilsbry from Rock 

 Island, is said by Mr. Bryant Walker to lie an nndeseribed sjiecies. 



iLijiiiiani niKin/iii'ilii Say is rejxirted from Soutbcrn Illinois by Ulffers, but this 

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

 have l)een seen >)y the writer. 



