HOW THE TROUT CAME TO CALIFORNIA. 287 
gibbsii . . Columbia Basin, from Shoshone Falls to 
Cascades. 
STEEL-HEAD TROUT: SALMO GAIRDNERI. 
gairdneri . Coastwise streams, from Puget Sound to Pt. 
Sur. 
kamloops . Lakes of Upper Columbia and Fraser River. 
beardsleei . Lake Crescent. 
crescentis . Lake Crescent. 
stonei . . Upper Sacramento. 
shasta . . Upper Sacramento. 
gilberti . . Kern River, etc. 
agua-bonita Volcano Creek, etc. 
RAINBOW TROUT: SALMO IRIDEUS. 
irideus . . Coast Range brooks in California. 
masoni . . Coast Range brooks in Oregon. 
The following very hypothetical diagram shows 
their relationships : — 
MYKISS BOUVIER! 
oe LEWIS! 
HENSHAWI TOMIAS 
VIRGINALIS > 
° 
MACDONALD! 
SHASTA 
GAIRDN' 
STONE! AGUA- BONITA SPILURUS 
GILBERT! PLEURITICUS 
