STATE OF ILLINOIS 
DEPARTMENT OF REGISTRATION AND EDUCATION 
W. H. H. MiLter, Director 
BOARD OF 
NATURAL RESOURCES AND CONSERVATION 
W. H. H. MILter, Chairman 
WILLIAM TRELEASE, Biology Joun W. Atvorp, Engineering 
Joun M. Coutter, Forestry Kenpric C. Bascock, Representing the 
Roiiin D. SatitssBury, Geology President of the University of Illi- 
WitiiaM A. Noyes, Chemistry nots 
THE NATURAL HISTORY SURVEY DIVISION 
STEPHEN A. ForsEs, Chief 
(52929-1200-7-21) 
