256 Fisnine iy American Waters. 
like the brook trout’s; its fins are like those of the brook 
trout, even to the square or slightly lunate end of tail. It has 
the amber back and silver sides of such brook trout as have 
access to the estuary food of the eggs of different fishes, the 
young of herring, mackerel, smelt, spearing, shrimp, and even 
the young of its own family and those of the salmon. Ow- 
ing to this food, it becomes whiter and brighter than those 
trout which inhabit swampy waters impregnated and discol- 
ored by decayed vegetable matter, where the trout are con- 
fined without the power of visiting salt water. All the au- 
thorities agree that the sea trout spawns at the heads of 
fresh-water streams, ascending from the estuary in August, 
and not returning until the following winter and spring. 
All brook trout visit the heads of streams in autumn, and 
return to the lower waters at the close of winter. Brook 
trout of mountainous regions, where the streams run through 
rocky defiles and mountain gorges, or through a sandy soil, 
are always brighter than the black-mouthed trout of hemlock 
and tamarack swamps. Iam informed that, of fifteen trout- 
lakes in a certain part of Scotland, there are not two lakes 
which contain trout entirely similar. Even the famous Gil- 
laroo trout, which some anglers suppose to have a gizzard, 
has merely a Inmp in its stomach formed by the peculiarity 
of the clay and other substances on which it feeds. In the 
United States and the Canadas we have the salmon, the sal- 
