64 



Genus Micromya (Agassiz) Simpson. 



Micromya fabalis Lea. 



Wabash River (Marsh). 



Genus Lampsilis Rafinesque. 

 Subgenus Lampsilis Rafinesque. 

 Section Lampsilis Rafinesque. 

 Lampsilis ventricosa Barnes (= occidens Lea, suhovata Lea).* 



Oregon, Ogle Oo. ; Starved Rock, La Salle Co. ; Savanna, Car- 

 roll Co. (Baker) ; Cook Co. (Baker, Calkins) ; Northern Illinois; 

 Fox River (Calkins) ; Dundee, Kane Co. (Engleholm, Nason) ; 

 Hickory Creek ; Kaskaskia River (Ferriss, Handwerk) ; Du Page 

 River; Illinois River (Handwerk); Mississippi River, Quincy, 

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

 Winnebago Co. ; Ohio River; Kaskaskia River (Hinkley) ; La 

 Salle Co. (Huett); Fulton Co. (Kelly, Wolf); Mercer Co.; 

 Ohio River; Mississippi River (Marsh); Athens, Menard Co. 

 (Nason); Mt. Carmel, Wabash Co. (Nelson); Spoon River 

 (Strode); Southern Illinois (Ulffers) ; Embarras River, Oak- 

 land, Coles Co. ; Quiver Creek, Havana, Mason Co. (State Lab- 

 oratory). 



Lampsilis capax Green. 



Northern Illinois; Mt. Carmel, Wabash Co. (Calkins); Mer- 

 cer Co. (Ferriss, Marsh) ; Shawneetown, Gallatin Co. (Fischer) ; 

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

 River (Marsh) ; Spoon River, Fulton Co. (Strode) ; Southern 

 Illinois (Ulffers); Fulton Co. (Wolf). 



Lampsilis ovata Say. 



Ohio River (Marsh). 



Lampsilis multiradiata Lea. 



Cook Co. (Baker) ; Illinois (Call) ; Dundee, Kane Co. (En- 

 gleholm) ; Big Vermilion River (Marsh); Southern Illinois 

 (Ulffers). 



*La7npsUis cariosa Say is reported by Huett from La Salle county. The reference 

 was undoubtedly founded on specimens of ventricosa, as cariosa is a species of the 

 Atlantic and St. Lawrence drainage. 



