94 



paign Co. ; Spoon River and Thompson's Lake, Fulton Co. (State 

 Laboratory). 



Amnicola emarginata Kiister (= obtusa Lea). 



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

 Northern Illinois; Kankakee River (Calkins); Kankakee River, 

 Utica, La Salle Co. (Ferriss) ; Mercer Co. (Marsh) ; Fulton Co. 

 (Wolf); Lake Michigan, Chicago, Cook Co.; Quiver and Ma- 

 tanzas lakes, and Illinois River, Havana, Mason Co. (State Lab- 

 oratory). 



Genus Paludestrina Orbigny. 



Paludestrina nickliniana Lea. 



Cook Co. (Baker, Higley) ; Fox River (Calkins); Evanston, 

 Cook Co. (Lyon). 



Genus Somatogyrus Gill. 



Somatogyrus isogonus Say. 



Big Muddy River, Blairsville, Williamson Co. (Hinkley) ; 

 Quincy, Adams Co. (State Laboratory). 



Somatogyrus subglobosus Say. 



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

 Illinois (Calkins) ; Kankakee River; Joliet, AVill Co. (Ferriss) ; 

 Quincy, Adams Co. (Garman): Wabash, Little Wabash, and 

 Ohio rivers; Rock ford, Winnebago Co. (Hinkley); Hamilton 

 Co. (Lyon); Mississippi River (Marsh); Canton, Fulton Co.; 

 Athens, Menard Co. (Nason); Spoon River (Strode) ; Fulton 

 Co. (Wolf): Quincy, Adams Co.; Pekin, Tazewell Co.; Ha- 

 vana, Mason Co.; Peoria, Peoria Co.; Lake Michigan, Chicago, 

 Cook Co. (State Laboratory). 



Somatogyrus integer Say. 



Rock River (Calkins); Joliet, Will Co. (Ferriss); Wabash 

 River, White Co. ; Ohio River, Golconda, Pope Co.; Little 

 Muddy Creek, Rockford, Winnebago Co. ; Du Bois, Washington 

 Co.; Elizabethtown, Hardin Co. (Hinkley); Mississippi and 

 Wabash rivers (Marsh). 



Somatogyrus integer depressus Tryon. 



Du Bois, Washington Co. ; Rockford, Winnebago Co.; Peoria, 

 Peoria Co. (Hinkley) ; Rock Island Co. (Nason). 



Somatogyrus currierianus Lea. 



Elizabethtown, Hardin Co. (Hinkley). 



