86 



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

 River, Havana, Mason Co. ; Pistakee, Cedar, Fourth, Loon, Fox, 

 and Sand lakes, Lake Co. ; Lake Michigan, Cook Co. ; Thompson's 

 Lake, Fulton Co. ; Quincy, Adams Co. ; Grand Pierre Creek, 

 Herod, Pope Co.; Towanda, McLean Co (State Laboratory). 



Corneocyclas compressa laevigata Sterki. 



Cedar and Fox lakes and between Loon and Cedar lakes, Lake 

 Co. (State Laboratory). 



Corneocyclas compressa rostrata Sterki. 



Lake Michigan, Cook Co. (State Laboratory). 



Several specimens are provisionally referred to this variety 

 by Dr. Sterki. 



Corneocyclas cruciata Sterki. 



Lilycash Creek, Will Co. (Handwerk); Joliet, Will Co. 

 (Handwerk, Sterki). 



Corneocyclas fallax Sterki. 



Lilycash Creek, Joliet, Will Co. (Ferriss, Handwerk). 



Corneocyclas handwerki Sterki. 



Lilycash Creek, Will Co. (Handwerk). 



Corneocyclas idahoensis Roper. 



Lake Michigan, Cook Co. (Daniels). 



Corneocyclas pauperculata crystalensis Sterki. 

 Sand Lake, Lake Co. (State Laboratory). 



Corneocyclas mecliatia Sterki. 



Pistakee Lake, Lake Co. (State Laboratory). 



Corneocyclas tenuissima Sterki. 



Long Lake, Lake Co. ( State Laboratory). 



Corneocyclas kirklandi Sterki. 

 Cook Co. ( Baker ) . 



Corneocyclas noveboracensis Prime. 



Northern Illinois (Marsh) ; Cedar and Pistakee lakes, Lake 

 Co. (State Laboratory ). 



Corneocyclas noveboracensis elevata Sterki. 

 Joliet, Will Co. (Ferriss, Handwerk). 



Corneocyclas peralata Sterki. 



Elizabethtown, Hardin Co. (Hinkley); Havana, Mason Co. 

 (Sterki) ; Fox Lake, Lake Co. : Lake Michigan, Cook Co. (State 

 Laboratory). 



