100 



La Salle Co. (Huett) ; Mercer Co. (Marsh) ; Fox River; Algon- 

 quin, Flint Creek and Crystal and Silver lakes, McHenry Co. 

 (Nason) ; Quincy, Adams Co. ; Quiver and Matanzas lakes, and 

 Illinois River, Havana, Mason Co. ; Grand Pierre Creek, Herod, 

 Pope Co. ; Normal, McLean Co. ; Peoria, Peoria Co. ; Polecat 

 Creek, Ashmore, Coles Co. ; Cypress Creek, Grantsburg, Johnson 

 Co. ; Urbana, Champaign Co. ; Union Co. ; Lake Michigan, 

 Chicago, Cook Co. (State Laboratory). 



Physa gyrina oleacea Tryon (= elliptica of authors, not of Lea). 



Cook Co. ; Northern Illinois (Baker, Nason) ; Quincy, Adams 

 Co. (Hart) ; Little Muddy River (Hinkley) ; Algonquin, Mc- 

 Henry Co. ; Quincy, Adams Co. ; Athens, Menard Go. (Nason) ; 

 Miller's Pond, Union Co. ; Saline Co. ; Peoria, Peoria Co. ; Pekin, 

 Tazewell Co. ; Pistakee and Fourth lakes, Lake Co. ; Dixon, Lee 

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



Physa gyrina hildrethiana Lea. 



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

 Salle Co. (Huett) ; a lake in Illinois (Lea) ; Canton, Fulton Co. 

 (Lewis) ; Fulton Co. (Marsh, Wolf); Elgin, Kane Co. ; Crystal 

 Lake, McHenry Co.; Athens, Menard Co. (Nason). 



Physa integra Haldeman ( = niagarens/s Lea). 



Savanna, Carroll Co. (Baker); Oregon, Ogle Co.; Cook Co. 

 (Baker, Nason) ; De Soto, Jackson Co.; Du Bois, Washington 

 Co.; Rockford, Winnebago Co.; Big Muddy River ( Hinkley) ; 

 Elgin, Kane Co. ; Crystal and Silver lakes and Algonquin, 

 McHenry Co. (Nason) ; Blue Mound, Macon Co. ; Peoria, Peoria 

 Co. ; Pistakee, Fox, Cedar, Sand, and Fourth lakes, Lake Co. ; 

 Quiver and Matanzas lakes, and Illinois River, Havana, Mason 

 Co. ; Lake Michigan, Chicago, Cook Co.; Bluff Lake, Anna, 

 Union Co. ; Pekin Lake, Tazewell Co. ; Flag Lake, Fulton Co. ; 

 Cedar Creek, Quincy, Adams Co. (State Laboratory). 



Physa walker/ Crandall. 



Rockford, Winnebago Co. (Hinkley); Elgin, Kane Co. 



(Nason). 



Physa crandalli Baker {=rhomboidea Crandall, 1901, not Meek and 

 Hayden, 1856). 

 Big Muddy and Saline rivers: Jefferson Co. (Hinkley); 

 Athens, Menard Co. (Nason). 



