9S) 



Subclass Euthyneura. 



Order ITLMONATA. 



Suborder BASOMMATOPHORA. 



Superfamily Hyorophii.a. 



Family PHVSID/E. 



Genus Physa Draparnaud. 

 Physa ancillavia Say (= vinosa of authors, not of Gould). 



Quincy, Adams Co. (Garman): tank pond, I)u Bois, Wash- 

 ington Co. : Winnebago Co. (Hinkley) : Winnebago Co. (Marsh) ; 

 Lake Michigan, Cook Co. (Nason). 

 Physa sayii Tappan. 



Cook and Will counties: Northern Illinois (Baker) ; Fox Eiv- 

 er; Algonquin, McHenry Co. (Nason): Clear, Sand, and Cedar 

 lakes, Lake Co. : Peoria, Peoria Co. : Urbana, Champaign Co. ; 

 Milan, Rock Island Co.: Havana, Mason Co.: Northern Illinois 

 ( State Laboratory ) . 



Physa heterostropha Say. 



Cook (b. (Baker, Calkins): Southern Illinois (Binney, Dif- 

 fers) : Quincy, Adams ('o. (Garman): Joliet, Will Co.: Kan- 

 kakee Kiver (Handwerk) : Saline River: Winnebago, Washing- 

 ton, and Hardin counties (Hinkley) ; Mercer Co. (Marsh) : Sil- 

 ver and Crystal lakes and Algoncfuin, McHenry Co. (Nason) : 

 Thompson-s Lake, Fulton Co. (Strode): Cedar, Pistakee, and 

 Clear lakes, Lake Co. ; (i)uiver Lake, Havana, Mason (_!o. : Nor- 

 mal, McLean Co.: McHenry t 'o. (State Laboratory). 



Physa anatina Lea. 



Elizabethtown, Hardin Co. (Hinkley); Algonquin, McHenry 

 Co. (Nason) : Quincy, Adams Co. (State Lalioratory). 



Physa gyvi/ia Say. 



Northern Illinois (Baker, Calkins) : Cook Co. (Baker, Calk- 

 ins, I^yon, ^\'(lO(lrull') : ()regon, ()gle('o. ; Savanna, Carroll Co. 

 (Baker, Nason): i)u Page River (Ferriss): Kankakee lliver 

 (Handwerk) : Winnebago, Jeil'erson, Hardin, and Washington 

 counties: Saline River (Hinkley) : Fulton Co. (Hinkley, Wolf) : 



