80 



Mississippi River, Quincy, Adams Co. (Hart); all rivers visited 

 (Hiiikley); Si)Oon River; Illinois River (Kelly, Strode); Mer- 

 cer Co., Edwards Creek ; Mississippi and Illinois rivers (Marsh) ; 

 Fox River, Aliionquin, McHenry Co.; (^)uincy, Adams < 'o. ; 

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

 son ) ; Fulton Co. (Wolf) ; Meredosia, Morgan Co. (Woodruff) ; 

 Havana, Mason Co. (State Laboratory). 

 Quadndd pastulata Lea. 



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

 Utica, La Salle Co. (Ferriss); Shawneetown, Gallatin Co. 

 (Fischer) ; Kaskaskia, Wabash, and Ohio rivers (ilinkley) ; Mis- 

 sissippi River, Quincy, Adams Co. (Hart) ; La Salle Co. (Huett) ; 

 Hlinois and Spoon rivers (Kelly, Strode); Mississippi River, 

 Mercer Co. (Marsh); Athens, Menard CJo. (Nason ) ; Fulton Co. 

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



Reported from Chicago by Calkins, but no specimens have Ijeen 

 seen from this area. 

 Quadnda eooperiann Lea. 



Wabash River (Hinkley); Ohio River (Marsh); Fulton Co. 

 (Wolf). 

 Qnadrula rubiginosd Lea { — tiaca Conrad). 



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

 Hlinois River (Calkins); Kankakee River ( Ferriss, Handwerk ) ; 

 Mackinaw River, Kappa, Woodford Co. (Hart); Kishwaukee, 

 Rock, and Pecatonica rivers (Hinkley); La Salle Co. (Huett); 

 Spoon River ( Kelly, Strode ) ; Mercer Co., Edwards Creek ; Kan- 

 kakee River (Marsh); Algonquin, McHenry Co. (Nason); Ful- 

 ton Co. (Wolf); Havana, Mason Co. (State La1)oratory). 

 Quadrula trigona Lea. 



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

 (Baker, Derr, Jensen ) ; Northern Hlinois (Calkins); Kane Co. 

 (Engleholm); Kankakee River (Ferriss, Handwerk ) ; (Quincy, 

 Adams Co. (Hart, Nason); all rivers visited (Hinkley); La 

 Salle Co. (Huett); Hlinois and Spoon rivers (Kelly, Strode); 

 Mercer Co., Mississipi)i River (Marsh); Athens, Menard Vo. 

 (Nason) ; Fulton Co. (Wolf); Havana, Mason Co. (State Lab- 

 oratory). 



Quadrula ohliqua Lamarck. 



Savanna, Carroll Co. (Baker); Northern Hlinois and Missis- 



