S5 



MuscnlimiL nji/i(i'f/)'ii/ii Anthony. 



Mississippi River (Marsh) ; Canton, Fulton Oo. (Nason) ; Ful- 

 ton Co. (Wolf). 



MiiKCuIiu m secure Prime. 



Rock Run,Joliet, Will ('o.(Ferriss) ; Cook Co. (Jensen); Sand 

 and Cedar lakes, Lake Co. (State Laboratory). 

 Museuliuiii rosai'eidii Prime. 



Fulton Co. (Wolf). A somewhat doubtful record, as this 

 sjjecies is an eastern one. 

 Musciiliuiii jii ijd iiu III Prime {= jaticnuis Prime). 



Winnebago Co. (Hinlsley); Mercer Co. (Marsh); Havana, 

 Mason Co. (State Laboratory). 



Genus I'orneocyclas Ferussac, 1818. 

 ( = Pisidhim Pfeiffer, 1,S24. ) 



Corneocyclas ahditd Haldeman. 



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

 (Calkins); Kankakee River (Ferriss); .Joliet, Will Co. ( Fer- 

 riss, Handvverk) ; Lilycash Creek, Will Co. ( Handwerk ) ; Win- 

 nebago Co. ( Hinkley, Marsh); La Salle (Jo. (Huett); Canton, 

 Fulton Co. (Nason): Quiver and Matanzas lakes, and Illinois 

 River, Havana, Mason Co.: Pistukee, Sand, and Cedar lakes, 

 Lake Co. ; Thompson's Lake, Fulton Co.; Grand Pierre t^reek, 

 Herod, Pope Co. ; Lake Michigan, (Jook Co. (State Laboratory). 

 Corneocyclas rihyssorum (Stimpsou) Sterki. 



Ort' Racine, Wisconsin, in deep water, dredged by George L. 

 Marston (Hoy, Sterki). 



As this species probably inhabits that part of Lake I\Hchigan 

 bordering on Illinois, it is included in this list. 



Corneocyclas a-qnUateralis Prime. 



Mercer Co. (Marsh); Havana, Mason Co.: Thompson's Lake, 

 Fulton Co. (State Laboratory). 

 Coriieocychis aftinis Sterki. 



Winnebago Co. (Hinkley); Illinois (Sterki). 



Coi'neiicyclas cam jircssa Prime. 



Cook Co. (Baker, Calkins, Higley, Jensen ) ; Northern Illinois 

 (Calkins) :.loli('t. Will Co. (Ferriss, Handwerk) ; Lilycash Creek, 

 Will Co. (Handwerk): Winnebago Co. and Big Muddy IJiver, 

 ( Hinkley) ; La Salle Co. (Huett) ; Mercer Co. (Marsh) : Canton. 



