U. S. FEDERAL FISHERY RESEARCH 

 ON THE GREAT LAKES 

 THROUGH 1956 



Marine Biological Laboratory 



LIBRARY 



DEC 1 1 1957 

 WOODS HOLE, MASS. 



SPECIAL SCIENTIFIC REPORT- FISHERIES No. 226 



UNITED STATES DEPARTMENT OF THE INTERIOR 

 FISH AND WILDLIFE SERVICE 



