List of Exchanges . 
969 
Chicago, Ill. 
Chicago Academy of Sciences. 
Field Columbian Museum. 
John Crerar Library. 
Journal of Geology, University of Chicago. 
Cincinnati, 0. 
Cincinnati Society of Natural History. 
Lloyd Museum and Library. 
Cold Spring Harbor, N. Y. 
Station for Experimental Evolution. 
Colorado Springs, Colo. 
Colorado College Scientific Society. 
Columbia, Mo. 
University of Missouri. 
Columbus, 0. 
*Geological Survey of Ohio. 
Mycological Bulletin. 
Ohio Academy of Sciences. 
Ohio Archaeological and Historical Society. 
Ohio State University. 
Davenport, Iowa. 
Davenport Academy of Natural Science. 
Denver, Colo. 
The Colorado Scientific Society. 
Des Moines, Iowa. 
Iowa Academy of Sciences. 
Granville, 0. 
Denison University. 
Hartford, Conn. 
*State Geological and Natural History Survey of Connecticut. 
Indianapolis, Ind. 
*Geological Survey of Indiana. 
Indiana Academy of Science. 
Iowa City, Iowa, 
State University of Iowa, Natural History Laboratory. 
