THE SALMON FISHEK. 25 



as large as those of Alaska, although the species are 

 the same. 



West of the Hudson Bay the sea trout (S. canaden- 

 sis or immaculatus) are replaced by S. malma so 

 stated by Dr. Bean.* The Hudson Bay waters also 

 seem to separate the habitats of the Atlantic and Pa- 

 cific salmon. Thence, westward, the range of the 

 O. chouicha continues indefinitely. As has been 

 stated, it is abundant in the Great Fish Eiver and its 

 tributaries, but it is not found in the Mackenzie, 

 some degrees to the westward. Diaries of resident 

 agents of the Hudson Bay Company show that the 

 ice is seldom out of that river, even in the hottest 

 months. It covers the Great Slave Lake in June 

 and is floating about the delta of the Mackenzie in 

 July and August. Representatives of the Salmoni- 

 dse found in that river are sea trout and a species of 

 Coregonus, or whitefish, known as " inconnu," which 

 is very little esteemed for food. There are compar- 

 atively few rivers along the Arctic shore, and in 

 many of these no salmon are found, for physical rea- 



* I have caught and handled trout on the southeastern Alaska coast which 

 seemed to me to be identical with the Atlantic sea trout. 



