PLATE XXXI. 



YR. 



STH & 6TM YR. 



a 



3RDYR. 



^^S^SilPW 



A 34 LB. WYE SALMON HEN FISH APRIL 26xn, 1909. 



This scale shows how variable in size and number are the annular rings 

 added to the scale, after decrepitation has occurred. 



(a) about 16 rings graduated in size. 



(b) about the same number, all small. 



(c) about 1 8 large and small rings. 



(d) about 9 large rings. 



(e) ten large rings have been added. 



The scale at the period of its third year appears to have been decrepitated 

 at its anterior edge. Mark the large size of the bands which have 



followed. 



Photographed and marked to the right by Mr. J. Arthur Hutton. 

 Magnified about 12^ diameters. 



