OF GREAT BRITAIN. 7 



cially on the under part of the body, crimson 

 and orange of various degrees of brilliancy. The 

 species of the Silver, or Migratory group, are 

 three in number ; which include, according to the 

 opinions of ichthyologists, the whole of our migra- 

 tory SalmonicUz, under whatever local names they 

 may occur : 



The true Salmon (Parr, Smolt, Grilse) Salmo 

 salar ; 



The Bull-Trout, also called Grey Trout, 

 Sewin, and Roundtail Salmo eriox ; and 



The Sea-Trout or Salmon-Trout (sometimes 

 also called White Trout) -Salmo trutta. 



In the few further observations which limits of 

 space permit of my offering on the general history 

 of the true Salmon (Salmo salar}, I shall adopt the 

 sequence suggested by its natural habits, as likely 

 to be that most easily followed and most conve- 

 nient for reference. Thus, commencing with the 

 ascent of the fish in the early spring and summer, 

 its course will be briefly sketched from the tidal 

 wave up the river to the spawning-ground, and 

 back again to the sea, the gradual changes of 

 colour and condition being at the same time 

 pointed .out. Returning then to the spawning- 

 beds, where the ova should be approaching the 



