HISTORY OF THE PACIFIC SALMON. 



577. 



annual winter bands like the others ; but, except for these bands, 

 the spacing between the lines shows no sudden increase due to 

 any abrupt change in the mode of life. Compare text-fig. 98, 

 the photograph of a scale of a large haddock, with the other 

 photographs illustrating this paper, and the difierence in the 



Text-fio-. 97. 



•^^« 



te:^A2im.- 



Ceiitve of scale of a Steellitad Trout {S. gairdiieri) from the Fvaser River, much 

 magnified, showing three winter bands before migration to the sea. (For references 

 see the text, p. 576.) 



centres will be at once apparent. I wish to emphasize 

 this difference because the Pacific salmon scales, if we except 

 those of 0. keta, the Dog Salmon, show a sudden change 

 of growth just as do those of the true salmon ; and this, to my 



