30 



BULLETIN OF THE BUREAU OF FISHERIES. 



Table 24. — Chinook Ybarlings from Lower Columbia River, Mar. 31 to .Apr. 2, 1916 — Contd. 



SPECIMENS WITH INTERMEDIATE GROWTH. 



April 13, 1 91 6, collections which contained specimens of yearlings were made on 

 Deer Island and on Cottonwood Island. The total number of yearlings in these two 

 collections is but 22. Of these, 10 are males and 12 females. The two sexes have 

 the same average length, 107 mm. Five specimens have scales which terminate the 

 growth in winter rings. The scales of the remaining 17 individuals show a distinct 

 intermediate band. The following table (25) gives the data for these collections: 



Table 25. — CmNOOK Yearlings from Deer and Cottonwood Islands, Apr. 13, 1916. 



FIVE SPECIMENS WITHOUT INTERMEDIATE GROWTH. 



SEVENTEEN SPECIMENS WITH INTERMEDIATE GROWTH. 



