FALSE ANNULUS 

 TRUE ANNULUS 



TRUE 

 ANNULUS 



EROSION 



^XUTTl NG OVER 



e ij ^•, ^'^"'''^ °^ a yearling largemouth bass showing well-defined true and false annul!. Both rings show "cutting over" in the posterior 

 held and are clear y separated throughout. The false annulus might be discarded by some workers because it lies fairly close to the true 

 annulus; fish caught September 20, 1939; age, 16 months. B. Scale of a yearling largemouth bass, caught October 30, 1939; age, 17 

 months. I his scale indicates that the fish grew very rapidly in 1938 (clear circuli throughout most of large scale), but very slowly in 1939 

 (.erosion on anterior and lateral edges of scale), and that the annulus was formed very late in the summer (narrow band of growth showing 

 no erosion outside of the annulus). 



PLATE 2 



