58 FISH HARVESTING. 
a piece of their brethren if carefully tied round 
a hook; from six ounces to a pound is about 
the average size. When they go to sea again 
from the lakes I had no opportunity of proving, 
but I imagine they go down with the floods, as 
the spring salmon come up. 
The second form in which I mistook it for 
a distinct species is that of the Humpbacked 
Salmon (Salmo proteus, Pallas; Salmo gibber, 
Suckley; ‘gerbuscha,’ Kamtschatka; ‘ hud-do’ of 
the Nesqually Indians ; ‘hwn-nuwm’ of the Fraser 
river Indians). In its general outline it differs 
altogether from the Hook-nosed Salmon. The back 
is much more arched; nose curved, but not nearly 
as muchas in the mature Salmo lycaodon, and the 
under-jaw turns up and terminates in a protu- 
berance or knob; teeth much more numerous, 
sharper, and smaller; tail deeply notched, and 
thickly spotted with dark oval-shaped marks. 
The most conspicuous feature is a large hump 
of adipose material situated on the shoulders, a 
little anterior to the dorsal fin, and only found 
in the male fish. It has generally been stated 
that this hump grows upon the male fish after 
entering the fresh-water: this is a mistake, 
for I have seen them again and again taken in 
the sea, before going up into the rivers, with 
