46 
Fic. 
J 
DEPARTMENT OF THE NAVAL SERVICE 
EXPLANATION OF PLATES. 
PLATE’ V. 
. Coho scales in early stage of development. 
Scale from a coho in the fall of the second year. 
. Seale from a coho in the spring of the third year. 
PLATE VI. 
Scale of mature fiish in fall of third year. 
PrATE Vilb 
Scale of coho that migrated as fry. : 
Centre of previous scale more highly magnified. 
GRAPHS. 
. Frequency curve for first-year growth. 
second-year growth. 
third-year growth. 
length at the end of the second year. 
length of mature fish. 
amount of growth in fresh water. 
7 GEORGE. V, A. 1917 
. Centre of scale more highly magnified to show winter check in fresh water growth. 
