7 2 



Salmonida? 



The flesh is softer than in the other species ; it is pale in color, 

 and, while of fair flavor when fresh, is distinctly inferior when 

 canned. 



The masu, or yezomasu (Oncorhynchus masou), is very similar 

 to the humpback, the scales a little larger, the caudal without 



FIG. 56. Humpback Salmon 



(female), Oncorhynchus gorbuscha (Walbaum)u 

 Cook's Inlet. 



black spots, the back usually immaculate. It is one of the smaller 

 salmon, and is fairly abundant in the streams of Hokkaido, 

 the island formerly known as Yezo. 



Of these species the blue-back or red salmon predominates 

 in Frazer River and in most of the small rivers of Alaska, includ- 



Fio. 57. Masu (female), Oncorhynchus masou (Brevoort). Aomori, Japan. 



ing all those which flow from lakes. The greatest salmon rivers 

 of the world are the Nushegak and Karluk in Alaska, with the 

 Columbia River, Frazer River, and Sacramento River farther 

 south. The red and the silver salmon predominate in Puget 

 Sound, the quinnat in the Columbia and the Sacramento, and 

 the silver salmon in most of the smaller streams along the coast. 

 All the species occur, however, from the Columbia northward; 



