36 



Samples A3 and A5, 9th August and 5th September respec- 

 tively, show the change which has been observed to take place 

 in other years at the beginning of September, the addition to the 

 shoal of herrings with a comparatively small first j^ear growth. 

 Sample A3 had nineteen herrings only with thice winter rings. 

 The growth of herrings with four winter rings is here given : — 



1918. — The first year growth of samples of this year has been 

 determined with the object of showing the relationship between 

 the most northern sample, Al, 15 miles N.E. of Berwick, 26th 

 June, and the fish of the Northumberland coast, represented by 

 sample 1, 10 miles N.E. of the Tjaie, 12th July, and also the change 

 in the shoal which has been shown to take place during August of 

 previous years. 



Sample Al for fish Avith three and four winter rings had a 

 smaller first year growth than had sample 1, and thus the two 

 samples can be compared with the samples of 1916, which showed 

 the fish with the largest first year growth more abundant in the 

 southern portion of the Northumberland shoal. 



The first year growth of herrings Avith three winter rings here 



follows : — 



Percentage at Centimetres. 



Sample. 4 5 6 7 



Al 1 3 9 16 2 



1 2 2 12 2 



Herrings with four winter rings had the following iirst year 



growth : — 



Percentage at Centimetres. 



Sample. 4 5 6 7 8 9 10 11 12 13 14 ^0£. 



Al 6 — 15 21 23 19 9 4 2 — — 47 



1 — 2 8 18 22 22 14 6 2 — — J12 



* One al 15 cm. 



