HISTOKY OF THE PACIFIC SALMOX, 



595 



As a rule Quinnats weigh from 18 to 30 lbs. in British 

 Columbia, but much larger specimens are taken, and in Alaskan 

 waters they have been caught over 100 lbs. in weight, and average 

 23 lbs. in some seasons. 



Quinnats are very powerful swimmers and ascend fast- running 

 streams in preference to othei's, making for the head waters, and 

 sometimes running up for many hundreds of miles. 



Text-fig. 109. 



JVl 



Scale of Quinuat {Oiicorhi/nclms tschaioi/tscha). 15 lbs. Length Slj inches ; 

 ;-irth IQj inches. New Westminster, Aug-vxst 1912. (For references see text, p. 596.) 



Most of the principal rivers have spring and autumn runs, 

 and some of them a summer run also, so Quinnats may be said 

 to run from January vmtil October. 



The scales I have examined show the running Quinnats to be 

 in tlieir fourth and fifth years, those over about 30 lbs. in -weight 

 being a year older than the others. Numbers of them are 



Proc. Zool. Soc— 1913, ^^o. XL. 40 



