1936] Schults: Keys to Fishes 139 



12b. Back not mottled, but with light spots like those on 

 the sides of the body, only smaller and paler ; body 

 less robust or stout. Range : Coastal streams from 

 Alaska to northern California. Marine and fresh- 

 water. Abundant. Fig. 33. 



Western Charr or Bull Trout. Dolly Varden Trout. 

 44. Salvclinns malma spectabilis (Girard) 



Fig. 33. Dolly Varden Trout. Bull Trout. 

 Salvclinus malma spectabilis. After Schultz 

 and Hanson. Courtesy of the Washington 

 Sportsman. 



Family 21. Coregonidae. Whitefishes 



la. Upper jaw longer than lower jaw, projecting over the latter; gill rakers 

 short, conic, 15 or fewer on lower limb of 1st gill arch; snout pointed; 

 maxillary not reaching past vertical line to anterior of eye ; 1 nasal flap be- 

 tween the 2 nostrils instead of 2 as in the genus Coregonus. 



2a. Scales in lateral line fewer than 65 ; species small, usually much less than 

 8 inches. 



3a. Scale formula 8+60 to 63+6; length of pectoral fin 7 times in standard 

 length ; height of dorsal fin 7 times in standard length ; length of head 

 4.5 to 5 in standard length. Range: Alaska (L. Aleknagik, Kendall, 

 1921) to headwaters of the Columbia. Freshwater. Common. 



Brown-backed Whitefish 



45. Prosopium coultcri (Eigenmann and Eigenmann) 



3b. Scale formula 7+58+4 to 7; length of pectoral fin 4.3 in the standard 

 length ; height of dorsal fin 4.6 in standard length ; length of head 

 4.0 in standard length; gill rakers 5+10. Range: Lake Crescent, Olym- 

 pic Peninsula, Washington. Freshwater. Rare. 

 Lake Crescent Whitefish 46. Prosopium snyderi Myers 



2b. Scales in lateral line more than 75, usually 8 to 10+80 to 95+6 to 9. 



4a. Adipose base contained 1 to 1.2 in anal fin base; total length of adi- 

 pose fin 1.9 to 2.4 in head. Range: Streams and lakes of western 

 slope of Rocky Mountains from Fraser River and Jasper Park south- 

 ward to the Truckee River, Lahontan Basin of Nevada and the head- 

 waters of the Saskatchewan and Missouri Systems. Freshwater. 

 Common. Fig. 34. 

 Rocky Mountain Whitefish 47. Prosopium williamsoni (Girard) 



