LECTURE VIII. 
69 
The common Salmon is the S. Salar of Lin- 
n^eus, and is an inhabitant of the northern regions, 
where it occurs at different periods both in salt 
and fresh waters, quitting the sea, at certain 
periods, in order to deposit its spawn in the 
gravelly beds of clear rivers. At this particular 
period hardly any obstacles are able to overcome 
the impetuosity of the Salmon intent on forcing 
their way up the stream ; and they are known ta 
spring up occasionally in such a manner as to pass 
cataracts of many feet in height. Like the Swal- 
low, the Salmon visits the self-same spot each 
season ; as has been ascertained by the experiment 
of fastening a small ring to the tails of some indi- 
viduals, and then setting them at liberty, when 
they have made their appearance at the same spot, 
for three successive seasons. The male Salmon 
is distinguished by its strongly curved or hooked 
jaws. 
The Trout, the Grayling, the Char, and a 
multitude of other Fishes, esteemed for the use of 
the table, belong to the genus Salmo. 
The genus Esox or Pike is known by its flat- 
tened head, wide mouth, sharp numerous teeth, 
and lengthened body, with the back and vent-fm 
