19 
of popular food, but our space in this island is too con- 
fined to enable us to deal with other than the best we can 
have, and I doubt, except in a few solitary cases, if any of 
the Corregoni fall under this head. 
The introduction of Golden Tench and the varieties of 
Carp are not considered in this paper, as the acclimatization 
of fishes has been treated merely in relation to Sal- 
monidae. 
DISCUSSION. 
Mr. WILMOT (Commissioner for Canada) said he rose 
with great pleasure to move a vote of thanks to Sir James 
Maitland for the very lucid and instructive Paper he had 
read, for he felt satisfied that much benefit would be 
derived from it. He was a deep lover of the science of 
fish culture, believing it to be one of the means by which 
the population of the earth hereafter would derive much 
benefit in the way of food and wealth. It was well known 
that the waters of almost every country which had been 
largely inhabited had become very scarce of fish, but this 
result was brought about by the greed and avarice of 
mankind almost entirely, not in consequence of the pre- 
datory habits of other fish which frequented the same 
waters. In any new country an abundance of fish was to 
be found in the rivers and waters, showing that the balance 
of nature was evidently correct; that though fish fed on 
fish, they did not exterminate one another ; but the moment 
man stepped in with his engines of destruction, the fish 
were reduced to such an extent that this great Inter- 
national Exhibition had been established for the purpose 
of devising means whereby this description of food could 
be increased. He regretted to find that, to some extent, 
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