Bull. U. S. B. F., 1930. 
(Doc. 1081.) 
Figure 29. — Scale of a cod 17 inches long, in its third year, showing narrow and wide circuli. The scale on the left is 
focused to accentuate the ridges of the platelets, or sclerites, while the one on the right is focused to show the basal 
parts 
Figure 30. — The scale on the left shows a cod in its fourth year, tagged on Nantucket Shoals, October 17, 1924, length 
25% inches. The one on the right is from the same fish in its fifth year, recaptured on Nantucket Shoals, Octo- 
ber 24, 1925, length 30J-2 inches (+ 21) 
