26 



be evident from similar treatment of the samples. Hjort's Grimsby 

 sample gave less evidence of mixing as the herrings grew older, 

 and the growth attained at the formation of the third winter ring 

 more nearly approached uniformity. 



The first year growth of a number of the herrings examined 

 at Cullercoats has therefore been determined and expressed to 

 the nearest centimetre, a growth of from 7-6 to 8-5 being taken 

 as 8 cms. The whole of the samples for 1913, 1914 and 1915 have 

 been treated in this manner. Time has not allowed of a similar 

 treatmej^it of the whole of the samples of other years, but selected 

 samples have been examined. 



1913. — The samples of 1913 were small, especially at the begin- 

 ning of the investigations. The table setting forth particulars 

 relating to growth is therefore slightly different from the rest of 

 the tables w^hich give similar data, but it is thought the table will 

 be found to supph^ sufficient detail fox" purposes of comparison. 



Herrings with two winter rings from the Northumberland 

 Coast shoal (A to M) had on the whole a greater first year growth 

 than those from the shoals of trawled herring (N to X), the parti- 

 culars relating to them being summarised as follows : — 



Herrings with three winter rings were the predominant ye&v 

 class of the Northumberland Coast shoal, and differed little in their 

 first year growth from fish of the same age amongst the trawled 

 samples, the growth being as follows : — 



Percentage at Centimetres. 

 6 7 8 9 10 11 



3 8 20 26 17 13 



9 7 21 27 18 12 



The Northumberland Coast herrings with four winter rings 

 had a smaller first year growth than those of the trawled samples, 

 the growth being as follows : — 



