Bulletin 



OF THE 



Illinois State Laboratory 



Olf 



Natural History 



Urbana, Illinois, U. S. A. 



STEPHEN A. FORBES, Ph.D., L-L.D., 

 Director 



Vol. XI. July, 1915 Article I. 



AN OUTLINE OP THE RELATIONS OF ANIMALS 

 TO THEIR INLAND ENVIRONMENTS 



BY 



Charles C. Adams, Ph.D. 



