AN ECOLOGICAL SURVEY 



OF 



ISLE ROY ALE, LAKE SUPERIOR 



PREPARED UNDER THE DIRECTION OF 



CHAS. C. ADAMS. 



A Report from the University of Michigan Museum, published by the State Biological 



Survey, as a part of the Report of the Board of the 



Geological Survey for 1908. 



LANSING, MICHIGAN 

 WYNKOOP HALLENBECK CRAWFORD CO., STATE PRINTERS 



1909 



