598 



MR. J. A. MILNE ON THE 



the latter, and that in spite of what is a very obvious check in 

 growth. The check clearly lasted long enough for the edges of the 

 scales to become somewhat worn, for the lines following it do not 

 at all points exactly follow the contours of those immediately 

 preceding them. This fish cannot in these circumstances have 

 grown faster than its fellow, which was feeding all the time, 

 and yet there are 20 lines as against 12. If, however, it 

 spawned it added the twelve lines between the winter band and 

 the scar in the early part of the year 1911, and the eight lines 

 outside the scar in 1912. It would have spent the early part of 

 1911 in the sea, then come in to fresh water to spawn, and 

 remained there after spawning for some little time. It would 

 then have returned to the sea in poor condition and possibly not 

 very earlj^ in 1912, so that by the time it had made up condition 

 and started to grow again it would add but another 8 lines or so 

 to its scales before the spawning instinct again induced it to seek 

 fresh water, and thus brought it to the place of its capture. 



Text-fiff. in. 



bs. /V:'/ "-'-7. 



Piece of skill taken from a Quiiinat (O. tschawiitscha) after spawning. 



Compare this mark also with the outer spawning mark on 

 text-fig. 101, and note how like they are. 



A Quinnat of about 30 lbs. is just the size on which I think a 

 .spawning mark is most likely to be found. The larger fish, like 

 the 62| pounder, a scale of which is shown in text-fig. 96, have 

 most probably attained their size on account of the feeding 



