186 Pa.it III. — Twenty-fourth Annual Report 



The measurements of the plaice in these four series of collections, 

 reduced to percentages, are as follows : — 



Cm. 



1903. 



1901. 



June. 



July 



July. 



August. 



1 







•1 



- 



•5 



133 



•2 



1*3 





2 



35 3 



8-9 



73 





•5 



257 



32-8 



30-2 





3 



17-3 



37-1 



29-3 





•5 



4-6 



14-5 



17-4 



1-8 



4 



1-8 



3-3 



8-7 



9-0 



•5 



1-4 



1-8 



3-6 



12-6 



5 





1-1 



1-7 



20-1 



•5 





•2 



•4 



]6-9 



6 







•03 



13-1 



■5 









102 



7 









7-3 



•5 









4-7 



8 









2-5 



•5 









1-4 



9 









•18 



The features are also shown in the curves. It is probable from an 

 examination of the individual collections that the larger forms are not 

 sufficiently represented. They no doubt move out into somewhat deeper 

 water even at this early stage, and in part get beyond the depth at 

 which a man wades in using the push-net at low tide. 



Aberdeen Bay. 



A number of collections were made in Aberdeen Bay by means of a 

 small fine-meshed shrimp net, used from a yawl, in depths usually 

 ranging from 3 to 6 or 7 fathoms. The measurements of these 

 are grouped in 5 centimetres in Table IV., and it is apparent that, 

 though the numbers of fish are in no case large, three annual series or 

 generations are at least indicated. Thus, there is represented a series 

 ranging from 2cm. to 9cm. or 10cm. or a little more ; another from 15cm. 

 or 16cm. to 24cm. or 25cm., and a third from about 27cm, to 34cm. 

 These are best seen in the aggregates for March, April, and May, which, 

 with those for September and November, as grouped in centimetres 

 measure as follows : — 



[Table. 



