no 



THE SEA-TROUT 



Before making further comments upon these results I venture to 

 submit for purposes of comparison with every proper acknowledgment, 

 the results obtained by Mr. Knot Dahl in Norwegian waters : — 



Norway. 



Accumulating all these results, as I think may instructively be done, 

 we obtain the following data : — 



In order that the reader may judge for himself of the value of this 

 evidence drawn from scale reading, I submit reproductions of photo- 

 graphs taken by Mr. Hutton of (i) scales of Loch Lomond sea-trout 

 indicating {a) a 2 winters', {b) a 3 winters', {c) a 4 winters', and (^0 ^ 5 

 winters' residence in fresh water, and (2) to compare with the last of 

 these, because the reading is doubtful, the scale of a Norwegian sea- 

 trout indicating a 5 winters' residence in fresh water, prior to the 

 migration of these fish to the sea as sea-trout smolts (Figs. 31, 32, 33, 

 35 and 36). 



In this connection I may be allowed to repeat the scale of the 

 descending smolt (Fig. 34) described on page 105, which shows a 4 

 winters' residence of the fish in fresh water prior to its descent to the 

 sea in its fifth year, in order that the reader may compare it with the 

 scale of the whitling (Fig. 33) which had spent 4 winters in fresh water 



