UNITED STATES DEPARTMENT OF THE INTERIOR - J. A. Krug, Secretary 

 FISH AND WILDLIFE SERVICE - Albert M. Day, Director 



Explanatory Note 



The series, Special Scientific Report - Fisheries, 

 embodies results of investigations, usually of restricted scope, 

 intended to aid or direot management or utilization practices 

 and as guides for administrative or legislative action. It is 

 issued in limited quantities for the offioial use of Federal, 

 State or cooperating agenoies and in processed form for economy 

 arid to avoid delay in publication. 



Washington D. C< 

 September 1949 



