SEA-FISHERIES LABORATORY. 



125 



We shall now summarise Tables I and II — with interesting 

 results. 



(a) June sample. 



No. of Rings in a Scale. 

 9 



(b) September sample. 



No. of Rings m a Scale. 



d x 52-0 



A 36-S 



d 2 88-8 



A 



d z ; ... 



A i 



di 



A 



d, - 



A | 



d 6 



A 



d, - 



A 



^8 ». 



49-4 

 26-4 



75-8 

 13-6 

 89-4 



7-4 

 96-8 



46-0 

 27-6 

 73-6 

 12-7 

 86-3 



7-0 

 93-3 



3-8 

 971 



44-0 

 26-6 

 70-6 

 13-9 

 84-5 



6-6 

 91-1 



3-8 

 94-9 



2-1 

 97-0 



42-4 



27-8 

 70-2 

 13-1 

 83-3 



6-5 

 89-8 



3-4 

 93-2 



2-8 

 96-0 



2-1 

 98-1 



43 



26-3 

 69 3 

 13-7 

 83-0 



6-2 

 89-1 



3-1 

 92-2 



2-4 

 94-6 



1-7 

 963 



i-.y 



98-2 



In these summary tables the mean values of the d's are 

 collected for scales that have two up to eight rings. The A's 

 are the differences between these mean values, that is, they 

 are the mean widths of the zones of the scales added by growth 

 in each year. Thus, in the June 2-ringed scales 33-2 % of the 

 ringed portion is added on during the interval between the 



