1936] 



Schultz: Keys to Fishes 



135 



4b. Scales usually 25 to 31 (range 23 to 34) above, and usually 23 to 34 

 (range 19 to 39) below, the lateral line. 



Length Kyc 



of diameter 

 Snout 



Preoiax 



y Lengtn of 

 oauaal peduncle 

 rancalostegal rays 



Fig. 25. A diagrammatic drawing of a Rocky Mountain 

 Whitefish, illustrating various anatomical characters used in the 

 identification of salmonoid game fishes. After Schultz and Han- 

 son. Courtesy of the Washington Sportsman, 



3b. 



5a. Anal rays usually 15 to 17; pyloric caeca about 140 to 150; 1st 

 2 or 3 anal rays in individuals less than 4 inches long, not extend- 

 ing behind or longer than the following rays of anal fin ; gill rak- 

 ers 7 to 9+11 to 13; parr marks usually wider than the interspaces. 

 Range: Northern China to Alaska to San Francisco. Marine and 

 freshwater. Abundant. 



Chinook, King, or Spring Salmon 34. Oncorhynchus 



tshawytscha (Walbaum) 



5b. Anal rays usually 13 to 15 (rarely 16) ; pyloric caeca about 50 to 

 80; the 1st 2 or 3 anal rays are characteristically longer than rest 

 of anal rays and are margined with white, in individuals less than 

 4 inches in length ; parr marks usually narrower than the inter- 

 spaces. Range : Japan to Alaska to Monterey Bay. Marine and 

 freshwater. Abundant. 

 Coho or Silver Salmon 35. Oncorhynchus kisutch (Walbaum) 



Gill rakers comparatively long and numerous, 30 to 50 in number, (11 

 to 24+20 to 26) ; scales about 130 (125 to 145) in the lateral line, and 

 usually 19 to 24 (range 18 to 26) above, and usually 19 to 23 (range 17 

 to 27) below, the lateral line; anal rays usually 14 or 15; young with 

 rather large round black spots above the lateral line ; sides red at 

 spawning. Range : Japan to Alaska to Klamath River, California. Ma- 

 rine and freshwater. Abundant. Fig. 26. 

 Sockeye or Blueback Salmon. Little Red Fish. Silver Trout. 



Red Salmon 36. Oncorhynchus nerka (Walbaum) 



Fig. 26. Silver Trout. Redfish. Land- 

 locked Salmon. Oncorhynchus nerka. Af- 

 ter Schultz and Hanson. Courtesy of the 



Washington Sportsman. 



