H. R. Mis. Doc. No. 21 1 . — Exploration Alaskan Salmon Rivers. 



Plate IV. 



FIG. 9. The Steel Head (Salmo Gairdneri). Adult. (See page 3G.) 



FIG. 10. THE STEEL HEAD (Salmo Gairdneri). Young. ^See page 36.) 



FIG. 11. CLARK'S TROUT (Salmo purpuratus). (See page 37.) 



