46 



VERTEBRATE ANIMALS OF THE UNITED STATES 



spots; sides often with a broad pink stripe; rays of dorsal fin ii; anal 12; 

 scales about 150: Pacific Ocean and coastwise streams from Santa 

 Barbara, California to British Columbia and northwards; an important 

 food and game fish. 



S. kamloops Jordan. Similar to S. gairdneri; form more slender; 

 head 4.5; depth 4.3 scales 30-135 to 146-26; a broad lateral band of 

 bright rose color; under parts silvery; lakes in the basin of the upper 

 Columbia and Fraser Rivers. 



S. heardsleei Jordan & Scale. Blue-back. Similar to 5. gairdneri; 

 color very dark blue; no lateral rosy band; under parts white, not silvery; 

 size large; scales 130: Crescent Lake, Washington. 



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Fig. 22. — Saltno irideus {from Jordan is' Evermann) . 



S. crescentis Jordan & Beardslee. Similar to S. gairdneri; color 

 very dark blue; spots not numerous; a large black blotch on the cheek: 

 Crescent Lake, Washington. 



S. hathcecetor Meek. Length 600 mm.; head 3.5; depth 5.5; scales 

 150; rays of dorsal fin 10; anal 11; color blue; spots numerous; form 

 slender: Crescent Lake, Washington. 



S. irideus Gibbons. Rainbow trout (Fig. 22). Length 375 mm. or 

 more; weight about 3 lbs.; head 4; depth 3.8; rays of dorsal fin 11; anal 

 10; scales 21-135-20; color bluish above; sides silvery, with a broad pink 

 lateral band; back profusely spotted: in mountain brooks of the Coast 

 Range of California. 



S. masoni Suckley. Similar to S. irideus; mouth very small; scales 

 120 to 130: coastwise streams of Oregon and Washington. 



S. shasta Jordan. Rainbow trout. Similar to S. irideus; coloration 

 rather dark; spots extending at least to the lateral Hne; scales 145: 

 streams of the Sierra Nevada from Mount Shasta southward; the usual 

 rainbow trout of the fish culturists, which has been introduced exten- 

 sively into the eastern States. 



