149 



Table XVIII. Lengths of Plaice of Age-group III, c? $ 

 Liverpool Bay, 1908-1915. 



Relative abundance of Groups II and III — Liverpool Bay. 



1908-16 

 1914-16 

 1920 .. 



II 



3,638 

 630 

 928 



III 



442 



73 



802 



Ratio of II to III 

 100 : 12 

 100 : 12 

 100 : 86 



Next, we take the year 1920, for which we have better 

 data. Table 19 gives the results of measurements of plaice 

 caught in Liverpool Bay during the months June to December, 

 distinguishing the sexes and stating the measurements for each 

 month separately. Also Age-groups II (over two and under 

 three years old) and III (over three and under four) are distin- 

 guished. Now it is obvious that the data for the months 

 June to August in the case of Age-group II are incomplete, 



