I i 



Co. (Nasoii, Swick): Spoon uiui Illinois rivers (Strode); Soiilh- 

 ern Illinois (Ultf'ers): Fulton Co. (Wolf); Havana, Mason Co. 

 ( State Laboratory ) . 

 Cfnia glbbosuis delieatux Simpson. 



Cook Co. (Baker); Kent's Creek (Hinkley) ; Dundee, Kane 

 Co. (Swick). 



Unlo crassidens Lea. 



Savanna, Carroll Co. (Baker) : Northern Illinois (Calkins); 

 Illinois River, Utica, La Salle Co. (Ferriss) ; Kaskaskia and 

 Wabash rivers (Hinkley) ; La Salle Co. ( Huett ) ; Mercer Co., 

 Mississippi Kiver (Marsh); Mt Carniel, Wabash Co. (Nelson); 

 Spoon River (Strode); Fulton Co. (Wolf). 



Section Vnioinei-nf. Conrad. 

 Unlo tetralasnnis Say {= jdinesiaii.u.fs Lea). 



Washiiiiiton and Perry counties, in creeks and jxinds ( Hink- 

 ley) : Big Muddy River (Marsii) ; Phelps Lake, Fulton Co. ; Sid- 

 ney and Urbana, Champaign <'o. (State Laboratory). 

 Unio tetralasunis camptoilon Say. 



Du Bois, Washington Co., in pond (Hinkley): Albion, Ed- 

 wards Co. (Jensen). 



Genus Pleurobema (Rafinesque) Agassiz.* 

 I'lcurohcina ('Java Lamarck. 



Wabash River (Hinkley, Marsh). 



Section I'liihiiluisus Simpson. 

 Plcirrohc/i/a icsopi's Green. 



Savanna, Carroll Co. (Baker); Northern Illinois (Calkins); 

 Fox River, Dundee, Kane Co. (Connor) ; Kankakee River (Fer- 

 riss, Handwerk) ; Mississii)pi River, (^)nincy, Adams Co. (Hart) ; 

 Green, Kaskaskia, Wabash, and Rock rivers (Hinkley); La 

 Salle Co. (Huett); Mercer Co., Mississippi River (Marsh); 

 Athens, Menard Co. (Nason); Mt. Carmel, Wabash Co. (Nel- 

 son); Spoon River ( Strode) ; Southern Illinois ( l'l(lers) ; Ful- 

 ton Co. (Wolf) ; Hlinois River, Havana, Mason Co. (State Lab- 

 oratory). 



'' I'U'urohema cor Conrad is reported from Soutliern Illinois by Ulffers, — a misidentiti- 

 cation, as the species is confined to tlie Alaliama River system of Alal)amaand tlie 

 Flint River of Georgia. 



