92 



Valvata bicarinata Lea. 



Desplaines River ; Lake Michigan, Cook Co. (Baker); Rock 

 River (Ferriss) ; Joliet, Will Co. (Ferriss, Handwerk) ; Saline 

 River; Elizabethtown, Hardin Co. (Hinkley) ; Lake Co. (Jen- 

 sen) ; Mercer Co. (Marsh) ; Long, Sand, and Pistakee lakes, 

 Lake Co. ; Slough, Havana, Mason Co. (State Laboratory). 



Valvata bicarinata perdepressa Walker. 



Lake Michigan, Chicago, Cook Co. (Baker, Jensen, Lyon). 



Valvata bicarinata normalis Walker. 



Joliet, Will Co. (Ferriss); Willow Springs, Cook Co. (Hand- 

 werk); Quincy, Adams Co. (Hart); Lake Co. (Jensen); Crys- 

 tal Lake, McHenry Co. (Lyon) ; Cedar, Fox, Long, and Pistakee 

 lakes, Lake Co; Quiver and Matanzas lakes and Havana, Mason 

 Co.; McHenry Co; Fulton Co. (State Laboratory). 



Family AMNICOLID^E. 



Subfamily BYTHINIIN^E. 



Genus Bythinia Gray. 



Bythinia tentaculata Linne. 



Cook Co. (Baker, Jensen, Lyon). 



Subfamily HYDROBIINiE. 



Genus Amnicola Gould and Haldeman. 



Amnicola limosa Say. 



Savanna, Carroll Co. (Baker, Nason) ; Cook Co. (Baker, Calk- 

 ins, Jensen, Lyon) ; Du Page River (Ferriss) ; Quincy, Adams 

 Co. (Garman) ; Northern Illinois; Mercer Co. (Marsh); Algon- 

 quin, McHenry Co. ; Elgin, Kane Co. (Nason) ; Fulton Co. 

 (Wolf) ; Cedar, Pistakee, Fox, Long, and Sand lakes, Lake Co.; 

 Lake Michigan, Chicago, Cook Co. ; Clear and Quiver lakes, and 

 Illinois River, Mason Co. ; Flag and Thompson's lakes, and Spoon 

 River, Fulton Co. (State Laboratory). 



Amnicola limosa porataS&y (= orbiculata Lea). 



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

 Kankakee and Du Page rivers (Ferriss) ; La Salle Co. (Huett) ; 

 Macoupin and Mercer counties (Marsh) ; Canton, Fulton Co. ;Rock 

 Island, Rock Island Co. (Nason); Fulton Co. (Wolf); Lake 

 Michigan, Chicago, Cook Co. ; Fox Lake, Lake Co. ; Quiver Lake, 

 Havana, Mason Co. (State Laboratory). 



