Bull. U. S. B. F., 1'.)2S. (Doc. 10.53.) 



Fig. 10.— Scale from the same individual of which scales are shown in Figures 8 and 9. All trace 

 of the first annulus has disappeared. Compare with Figures 8 and 9 



Fig. U.— Scale of Lake Huron herring (i. arledi) taken September 17, 1917. at .Mpena, Mich. 

 University of Michigan Museum No. .=i2220. Length, 108 millimeters. Immature. Age I. 

 No completed annulus shown on scale 



