AN ECOLOGICAL STUDY OF SOUTHERN 

 WISCONSIN FISHES 



The Brook Silversides (Labidesthes sicculus) and the Cisco 

 (Leucichthys artedi) in Their Relations to the Region 



W0 



C35" 



WITH 16 PLATES AND 27 TABLES 



BY 



ALVIN ROBERT CAHN 



Contributions from the 



Zoological Laboratory of the University of Illinois 



under the direction of Henry B. Ward 



No. 297 



