ft Mngbvhe/m 



STATE OF ILLINOIS William G. Stratton, Governor 



DEPARTMENT OF REGISTRATION AND EDUCATION 



Vera M. Binks, Director 



1957 



Types of 



LATE CENOZOIC GASTROPODS 

 in the Frank Collins Baker Collection, 

 Illinois State Geological Survey 



A. Byron Leonard 



REPORT OF INVESTIGATIONS 201 



ILLINOIS STATE GEOLOGICAL SURVEY 



JOHN C. FRYE, Chief URBANA, ILLINOIS 



