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DEPARTMENT OF THE NAVAL SERVICE 



is maintained for several seasons. Fig. 35 shows the distribution of the year-classes 

 during these three seasons, as revealed in the samples, the single divergent sample 

 from 1915 is here omitted, but will be referred to later on, as it is of considerable inte- 

 rest. We have noticed, in the three foregoing figures, that no essential difference was 



Fig. 33. 



/\ge qroupi 



^ 5 6 7 8 9 10 t1 12 I i 14 15 16 17 18 19 ?0 ?1 2? a 



i, 5 6 7 8 9 10 11 12 13 14 15 16 17 16 1« 20 21 22 2S 

 /\qe groups 



Fig. 34. 



apparent between the samples from different localities. Here again, in the present 

 case, the samples from the three seasons are seen to differ but very slightly one from 

 another, save perhaps for the fact that the autumn samples seem to include a greater 

 number of jouns; fi.'--h than those from the spring. The difference, however, is by no 



