258 SALMONIDJ2. 



in place of sixty, so that it is not easy to confound the 

 two fish. 



Though Salmon fresh from the sea is found in Lake 

 Ontario, and is taken with the gill-net at the Humber 

 mouth, and occasionally even at the ultima thule of the 

 bar of Hamilton Bay, as well as at Bond Head and the 

 mouths of the Credit and Trent (to the extent in all of 

 between one and two hundred fish in the course of the 

 season) it is never induced to take either fly or bait. 



How fish travelling such distances are enabled to find 

 their way back so unerringly to the waters they had left, 

 is a marvel that can only be accounted for by supposing 

 them to be endued with powers of memory sufficient 

 to recal the various way marks on their course. 



The fact of their being more plentiful along the 

 northern shore of the lake than the southern is attri- 

 buted to the greater coldness of the streams entering on 

 that side; but it is singular that the only river of either 

 shore in which they are entirely unknown should be the 

 one of greatest volume, in fact the chief tributary of the 

 lake, namely, the Niagara : a river, too, not merely free 

 from impurities and clear of all mill-dams and other 

 obstructions, but of unusual clearness and transparency. 

 Its strong current, deep abrupt sides, and want of 

 shallows or gravelly beds suitable for spawning, are per- 

 haps sufficient to account for fish not breeding there; 



