FISHES 45 



T. virginalis Gir. Similar to T. clarkii; scales 145; spots small and 

 contined to the back; size very large: upper Rio Grande basin; south- 

 ward into Mexico. 



T. Utah Suckley. Similar to T. virginalis; color pale: Utah Lake and 

 westward of the Wahsatch range. 



T. pleiiriticus Cope. Similar to T. clarkii; scales 185 to 190; size 

 large; lower fins red; spots numerous: head waters of the Colorado. 



T. houvieri Bendire. Similar to T. clarkii; spots all behind the dorsal 

 fin: Waha Lake, Idaho. 



T. stomias Cope. Green-back. Similar to T. clarkii; body deep 

 green above; spots mostly back of the anal fin: head waters of the 

 Arkansas and South Platte. 





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Fig. 21. — Triilla gairdneri {from Jordan b' Evermann). 



T. macdonaldi J. & E. Yellow-fin. Similar to T. clarkii; spots 

 small and- numerous on hinder part of body, few or none anteriorly; 

 lower fins bright yellow; size large: headwaters of the Arkansas. 



T. decUviJrons Meek. Similar to T. clarkii; color dark blue; fore 

 part of the body with a sharp upward curve; scales 148; no spots except 

 a few on the caudal fin: Lake Southerland, Washington. 



T. jordani Meek. Similar to T. clarkii; spots very numerous and 

 very black; fins orange; scales 146: Lake Southerland, Washington. 



T. gairdneri Richardson. Steelhead trout (Fig. 21). Length 750 

 mm.; weight about 4 lbs.; extreme weight 20 lbs.; color olive green 

 above; sides silvery; back and sides more or less covered with small 

 black spots; sides often with a broad pink stripe; rays of dorsal fin 11 ; 

 anal 12; scales about 150: Pacific Ocean and coastwise streams from 

 northern California to British Columbia and northwards; an important 

 food and game fish. 



T. beardslei Jordan & Seale. Blue-back. Similar to T. gairdneri; 

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

 size large; scales 130: Crescent Lake, Washington. 



