RuLL., r. S. n. F.. 192S. (Doc-. 1047.) 



EXPERIMEXT 12 



Fin. 77. —Marked at Big White Salmon River hatchery during the spring of 1923. when approximaiely s months old. Recov- 

 ered at Astoria. Greg., August 23, 192f). in its fourth year. Male, 39 inches long and weighmg 2s.'> iioimils, showing a 

 poorly differentiated composite nucleus. Tlie first year's growth blends so gradually into that of ihe second year that 

 it is impossible to determine where the first year ends and the second begins. X 25 



Fio. 78.— Marked at Big White Salmon River hatchery during the spring of 1923. when approximately 8 months old. Recov- 

 ered at Pillar Rock, Wash.. August 2.5. 192.i. in its third year. Male. 26 inches long and weighing 12 pounds, showingan 

 incidental check in the second year, which is not sufficiently jironounced to be conTused as an annulus. X 13 



Fig. 79.— Marked at Big White Salmon River hatchery during the spring of 1923. when approximately 8 months old. Recov- 

 ered at Astoria, Oreg., August 24. 1926, in its fourth year. Female, 37 inches long and weighing 22.25 pounds, showing 

 an incidental check in the second year, which might be mistaken for an annulus. A part of the fourth summer's growth 

 |has been removed by absorption of the scale. X 13 



Fig. 80. — Nuclear region of the scale shown in Figure 78. X 25 



Fig. 81.— Marked at Big White Salmon River hatchery during the spring of 1923, when approximately 8 months old. Recov- 

 ered at Astoria, Oreg., August 2. 1924, in its second year. Male. 22 inches long and weighing 5 pounds. X 13 



