HISTORY OF THE PACIFIC SALMON. 601 



second year is very difficult to make out. I feel convinced that 

 the greater part of it (I mean as to time) has taken place in fi'esh 

 water in nearly every instance, and in no instance am I quite 

 convinced that the whole of it did not do so. If the whole of the 

 second year's growth took place in fresh water, the fish are a year 

 older than I have stated above. In all cases (I speak, of course, 

 only of the fish I have examined) the first entry into the sea 

 appears to have taken place between 18 months and 2 years 

 after hatching. Further certainty is added to this statement 

 hy the measurements of the scales, which show the second year's 

 growth to have been comparatively small. In three instances in 

 which, from the arrangement of the rings, I think the fingerlings 

 entered the sea when about 18 months old, the little fish were 

 three times as long at the end of their second year as at the end 

 of their first. Kone of the others even quite doubled their 

 length. That is what one would expect at that stage from fresh- 

 water feeding, but not from seafood. In the third year growth is 

 very rapid, and hardly diminishes even as winter comes on. 



Text-fi^r. 114. 



S^>^'-^53?^C 



Scale of Cohoe (0. Usutch), $ . 14. lbs. Puget Sound, 18tli October, 1911. 



Text-figs. 114 and 115 are typical Cohoe scales. 



All the scales from Puget Sound are from fish captured on 

 18th October, 1911, and all show at their edges the lines coming 

 close together to form the next winter band, see text-fig. 114. 

 A similar formation may be noted on text-fig. 113, which reached 



