596 MR. J. A. MILISTE ON THE 



spawned in the hatcheries, from which it was estimated that 

 90,740,472 were liberated in 1910. 



I have ah'eady shown photographs from scales of Quinnats 

 Avhich weighed 33| lbs. and 62| lbs. (see text-figs. 95 and 96, 

 pp. 574 & 575) and I now append another' (text-fig. 109) from a 

 fish which weighed 15 lbs. The parr or fingerling stage of each 

 scale shows that the fish spent a year (A) and the greater part of 

 a second year (B) in fresh water. 



I have examined scales from eighteen Quinnats varying in 

 weight from 10 to 62| lbs., and all show about the same duration 

 of the freshwater stage. 



When the little fish enter the sea they seem to be already 

 larger than the Sockeyes, and to mea.sure from 4 to 6 inches in 

 length. The lengths of the 62| lb. fish at various ages, deduced 

 from the measurement of eleven scales, were as follows : — At the 

 end of the first year 2| inches, when it entered the sea in its 

 second year 4^^ inches, at the end of the second year 13g inches, 

 at the end of the third year 25 inches, at the end of the fourth 

 year 39 inches, and when captured it measured 50| inches. The 

 scale illustrated (text-fig. 96) agrees exactly with these averages 

 up to the end of the third year, but the j)osition of the fourth 

 winter band on it would show the fish to have been about 

 40 inches long at that time instead of 39 inches, if that scale 

 alone were to be depended upon. 



The lengths of the 15 lb. fish, as shown from 22 scales, were, at 

 the end of its first year 3| inches, when it entered the sea 

 5 J inches, at the end of its second year 13| inches, at the end of its 

 third year 26 inches, and when captured it measured 31 1 inches. 

 Text-fig. 109 shows the points from which the measurements were 

 taken, the scale being exactly an average one. 



The measurements of the 33^ lb. fish, averaged from 16 scales, 

 were, at one year 3;^ inches, when it entei-ed the sea 4| inches, at 

 the end of the second year 12| inches, at 3 years 21| inches, at 

 4 years 31 inches, and when captured 41 1 inches. 



The above seem to be about the average lengths of Quinnats at 

 the ages given. None of the twelve specimens I have measured 

 depart far from them.* 



The Sjyaioning MarJc. 



On the scale of the 33j lb. Quinnat (text-fig. 95, p. 574), a 

 check in growth (aS') may be observed beyond the fourth winter 

 l)and (E). It is equally clear on every scale of this fish, and 

 I think it must be a spawning mark. One might expect 



* Note : — Since this paper was written I have ascertained that in the Natural 

 History Museum, South Kensington, there are specimens of Quinnat parr, about 

 4 inches in lengtli, wliich came from a lake near the head waters of the Fraser River. 

 I have had the privelege of examining the scales of one of these specimens which 

 measured about 4^ inches. The first winter band is quite clear, and five lines 

 formed in the second summer are apparent. 



