HISTORY OF THE PACIFIC SALMON. 



599 



instinct being more pronounced than the sexuaL Scale reading, 

 so far as it has gone, has shown that our own very large salmon 

 are all maiden fish. 



Text-fig. Ill shows a piece of Quinnat skin taken from a fish 

 that had lately spawned. 



The Cohoe [Oncorhynchus kisutch). 



The salmon with which I shall next deal is the Cohoe, also 

 known as the Silver Salmon and the Fall Salmon. The photo- 

 graph of its skin (text-fig. 112) shows that the scales overlap 

 much more than those of either of the species already described. 

 A spawning mark should therefore be better defined if one were 

 to be found. 



Text-fio-. 112. 



Piece of skill of the Cohoe (OneorJii/ncJ/ns kisufcJi) 



The Cohoe Salmon gets the name of "silver" salmon from its 

 appearance when it first comes in from the sea. It is then a 

 most brilliant silver with a greenish tint on the back. As 

 spawning time approaches it becomes a dirty red. The Cohoe is 

 found in almost all the Pacific Coast streams from Monterey Bay 

 northwards. The run in the Fraser River is in September and 

 October, but the Cohoes are on the coast from July to November. 

 The weight of Cohoes canned in 1909 was 17,789,890 lbs., but 

 large numbers, 1,152,452 lbs. in United States waters alone, were 

 dealt with in other ways. The Cohoes in British Columbia 

 weigh usually from 3 to 8 lbs., but larger specimens are by no 



