UISTOllY OF THE PACIFIC SALMON. 



589 



one of these Sockeyes spent a year at least in fresh water, and 

 the first of them probably not less than 15 months. I can 

 conceive of no other way in which scales with centres similar to 

 these could have been formed. The}^ are the only Sockeye scales 

 which I have from measui'ed fish, but I have others from six fish 

 of which I know only the Aveights, and a great many more from 

 Sockeyes that unfortunately were neither weighed nor measured. 

 All have similar centres. 



Text-fio-. 105. 



fP^^V';:^ 



<K^<^ 



Scale of Sockeye (O. iierka) $ . 5i- lbs. Length 24^ inches ; girth 12^ inches. 



A=end of first winter. 

 C = end of second winter. 



B=migration to sea. 

 D = end of third winter. 



The Sockeye from which the scale, .shown in text-fig. 104, was 

 removed, was caught last August at New "Westminster, near the 

 mouth of the Fraser River. It weighed 3| lbs. and measured 

 20| inches in length and lOg inches in girth when captured. 

 I have measured 20 scales from this fish, the average length of 

 the enlarged images to which I applied the measure being 33 mm. 

 from the centi-e to the anterior edge. The other average 

 measurements to the points denoted by the lines drawn on the 



