LECTURE VIII. 69 



The common Salmon is the S. Salar of Lin- 

 nreus, 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 to 

 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-fin 



