461 



S 



14.GS: 

 OR 461 

 c. 1 



wmms mmmcm 



SURVEY -UeRAftY 



STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDUCATION 



ILLINOIAN AND KANSAN 

 MOLLUSCAN FAUNAS 

 OF ILLINOIS 



A. Byron Leonard 



John C. Frye 



W. Hilton Johnson 



CIRCULAR 461 



1971 



ILLINOIS STATE GEOLOGICAL SURVEY 

 URBANA, ILLINOIS 61801 

 John C. Frye, Chief 



