328 Salmonide 
and large black spots. This is Salmo clarkit stomias, and it is 
especially fine in St. Vrain’s River and the streams of Estes Park. 
Fic. 236 —Green-back Trout, Salmo stomiasCope. Arkansas River, Leadville, Colo. 
In Twin Lakes, a pair of glacial lakes tributary of the Arkansas 
near Leadville, is found Salmo clarkii macdonaldi, the yellow- 
finned trout, a large and very handsome species living in deep 
water, and with the fins golden yellow. This approaches the 
Colorado trout, Salmo clarkii pleuriticus, and it may be derived 
Fig. 237 —Yellow-fin Trout of Twin Lakes, Salmo macdonaldi Jordan & Evermann. 
Twin Lakes, Colo. 
from the latter, although it occurs in the same waters as the 
very different green-back trout, or Salmo clarkii stomias. 
Two fine trout derived from Salmo clarkii have been lately 
discovered by Dr. Daniel G. Elliot in Lake Southerland, a moun- 
tain lake near Lake Crescent, but not connected with it, the 
two separated from the sea by high waterfalls. These have 
been described by Dr. Seth E. Meek as Salmo jordan, the 
‘spotted trout’? of Lake Southerland, and Salmo declivifrons, 
the ‘“‘salmon-trout.’”” These seem to be distinct forms or sub- 
species produced through isolation. 
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