103 



Lymncea columella Say. 



Cook Co. (Baker); Little Muddy River, Du Bois, Washing- 

 ton Co.; De Soto, Jackson Co. (Hinkley) ; McHenry Co. 

 (Marsh). 



Ly tnniea columella ohalybea, Gould ( = casta Lea). 

 Mercer Co. (Marsh). 



Section Acella Haldeman. 

 Lymncea haldemani Deshayes (= gracilis Jay). 

 Cedar Lake, Lake Co. (State Laboratory). 



Subgenus Galba Schrank. 



Lymncea obrussa Say (= desidiosa of authors, not of Say). 



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

 Salle Co. (Calkins, Huett) ; Joliet,Will Co.(Ferriss, Handwerk ) ; 

 Desplaines River (Ferriss) ; Mackinaw River, Kappa, Woodford 

 Co. (Hart); Winnebago and Hardin counties (Hinkley); Mer- 

 cer and Will counties (Marsh); Elgin, Kane Co.; Fox River, 

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

 (Wolf); Dixon, Lee Co.; Panola, Woodford Co.; Galena, Jo 

 Daviess Co. ; Cedar, Fox, and Fourth lakes, Lake Co. ; Quiver 

 and Matanzas lakes, and Illinois River, Havana, Mason Co. ; 

 Urbana and Champaign, Champaign Co. ; Thompson's Lake, 

 Fulton Co. (State Laboratory). 



Lymncea obrussd plica Lea ( = exigua Lea ) . 



Chicago, Cook Co. (Baker, Jensen) ; Rockford, Winnebago 

 Co. (Hinkley). 



Lymncea obrussa decampi Streng. 



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

 Long lakes, Lake Co. (State Laboratory). 



Lymncea obrussa modicella Say. 



Cook Co. (Baker, Higley); Elgin, Kane Co; Fox River, Al- 

 gonquin and Crystal Lake, McHenry Co. ; Athens, Menard Co. 

 (Nason) ; Wabash Co. (Marsh) ; Urbana, Champaign Co ; Illi- 

 nois River, Havana, Mason Co.; Thompson's Lake, Fulton Co. 

 (State Laboratory). 



Lymncea tasewelliana Wolf. 



Tazewell Co. shore of Illinois River, (Wolf). Pleistocene 

 fossil. 



