590 



MR. J. A. MILNE ON THE 



figure were 5 mm., 6"5 mm., 10 mm., and 20 mm., and the lengths 

 of the fish at the various ages indicated work out as follows : — 

 At the end of the first j^ear 2| inches ; when it entered the sea 

 3 5 inches, at the end of the second year 6 inches, at the end of 

 the third year 12-i- inches, and wlien caught it was as state^ 

 20| inches. The points indicated by the lines drawn on text- 

 fig. 104 ai"e calculated from the averages of the 20 scales, and 

 they appear to coincide absolutely with the points I should have 

 marked from examination of this scale alone. 



Text-fig. 106. 



^ -*T3^g;-«i*«?— . ic-™*~ 



JP\ 



Scale of Socke^^e (O. nerka), $ . 7 lbs.. 26^ inches long; girtli 14f inches. 

 A=mignition to sea at end of 1st j-ear. B = end of 2nd year. C = end of 3i'd jear. 



The next scale, text-fig. 105, is from a iSockeye caught at the 

 same place and time. In the illustration the parr or fingerling 

 scale is not very clear, but the examination of 20 scales enables 

 me to put the lengths of the fish at the various points and times 

 indicated by the lines drawn on the picture as follows : — 1st year 

 2| inches, entered the sea during the second year when 3 inches 

 long, was already 9 inches long at the end of the 2nd year, 

 191 inches long at the end of the 3rd year, and, as was known. 



