STATE OF ailNOlS 

 DEPARTMENT OF REGISTRATION AND EDUCATION 



DIVISION OF THE 



NATURAL HISTORY SURVEY 



STEPHEN A. FORBES. Cfc**/ 



Vol. XV. BULLETIN Article VI. 



Illinois River Bottom Fauna in 1923 



BY 



ROBERT E. RICHARDSON 



PRINTED BY AUTHORITY OF THE STATE OF ILUNOIS 



URBANA, ILLINOIS 

 October. 1925 



