The Trout 



its crimson and yellow spots, and near 

 Campbellton, at the mouth of the river, 

 we took the fresh-run form of bright sil- 

 very coloration, with scarcely any mark- 

 ings on the back and without spots. We 

 also caught them a little higher up the river 

 in transition stages, when the characteristic 

 spots were beginning to appear, more or 

 less pronounced. We compared hundreds, 

 from plain silvery form to those with bright 

 crimson and golden spots, but could find no 

 structural differences. 



Marine fishes are very constant in color- changes in 

 ation, the non-colored portions being quite Coloratlon 

 silvery, while fishes of fresh waters are sub- 

 ject to frequent changes in hue, being much 

 influenced in this respect by the character 

 of their haunts. So when the brook trout 

 " goes to sea " it loses its spots and takes 

 on the silvery livery of marine fishes, but 

 resumes its original coloration soon after 

 entering fresh water. 



Just why the winninish of the upper St. TheWinninish 

 Lawrence, which is but a dwarfed form of 

 the Atlantic salmon, does not also proceed 

 93 



