322 Salmonide 
ernmost locality from which I have obtained trout, they seldom 
exceed a length of six inches. Although not usually an ana- 
dromous species, the rainbow trout frequently moves about in 
the rivers, and it often enters the sea, large sea-run specimens 
being often taken for steelheads. Several attempts have been 
made to introduce it in Eastern streams, but it appears to seek 
the sea when it is lost. It is apparently more hardy and 
less greedy than the American charr, or brook-trout (Salvelinus 
Fia. 231.—Rainbow Trout (female), Salmo irideus shasta Jordan. 
(Photograph by Cloudsley Rutter.) 
fontinalis). On the other hand, it is distinctly inferior to the 
latter in beauty and in gaminess. 
In the Kings and Kern rivers of California occurs a beautiful 
trout, Salmo gilberti, a variant of Salmo irideus, but with smaller 
scales. In isolated streams with a bottom of red granite at the 
head-waters of the Kern are three species called ‘‘ golden trout,”’ 
all small and all brilliantly colored, each of the species being 
independently derived from Salmo gilberti, the special traits 
fixed through isolation. These species are Salo aguabonita 
Jordan, of the South Fork of the Kern, Salmo roosevelti Ever- 
mann of Volcano Creek, and Salmo whitet Evermann of Soda 
Creek. These rank with the most beautiful of all the many 
forms of trout, in which group their coloration is quite unique. 
In beauty of color, gracefulness of form and movement 
