

TRANSACTIONS 



of the 



American Fisheries Society 



"To promote the cause of fish culture; to gather 

 and diffuse information bearing upon its practical 

 success and upon all matters relating to the fisheries; 

 to unite and encourage all interests of fish culture and 

 the fisheries; and to treat all questions of a scientific 

 and economic character regarding fish." 



FIFTY-FIRST ANNUAL MEETING 

 Allentown, Pennsylvania 



SEPTEMBER 5, 6, 7, 1921 

 Volume LI 

 I92I-1922 



Edited by Ward T. Bower 



Published Annually by the Society 

 WASHINGTON, D. C. 



