sOrvey library 



STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDUCATION 



Some Fern-Like Fructifications 

 and Their Spores from the 

 AAazon Creek Compression Flora 

 of Illinois (Pennsylvanian) 



H. W. Pfefferkorn 



R. A. Peppers 



T. L. Phillips 



CIRCULAR 463 



1971 



ILLINOIS STATE GEOLOGICAL SURVEY 

 URBANA, ILLINOIS 61801 

 John C. Frye, Chief 



