38 



is from and to an offshore area to the north of the summer feeding 

 ground. The migrants appear first in the proximal part of each 

 region, and depart later therefrom. 



(4) The first arrivals are the small plaice, and these are followed 

 by larger and larger sizes of inshore plaice, together with mature 

 examples. They depart in the same order, the smaller leaving the 

 inshore region first. 



(5) A number of plaice occur in the inshore region during the 

 winter, evidently either not migrating or being such as have arrived 

 late to winter there. 



The trawling experiments of the " Garland " and our own in 

 Northumberland gave evidence' of a smaller spring and a larger 

 autumn maximum. This does not appear from the " Goldseeker " 

 results, at least in the form in which they have been published. In 

 the cases in which they have been demonstrated they are plainly 

 associated with the appearance of the young plaice in the spring, 

 and with the return migration of these and the arrival of the larger 

 plaice in the autumn. 



Dab. — (1) There is a similar periodic migration of schools 

 between offshore winter and inshore summer grounds, subject also 

 to seasonal variation. 



(2) All sizes participate in the movement, from small and 



immature to large and mature, but again the majority are the 

 small. 



(3) In the inshore feeding ground, dabs predominate at the 

 southern part of the region and of the sub-divisions thereof, and it 

 is concluded therefore that the migration is from and to an offshore 

 area to the south of the summer feeding ground. 



(4) The early arrivals are the small dabs, and these are followed 

 by larger dabs, which arrive for the most part still higher along the 

 coast. It is more than probable therefore that the wave of dabs is 

 segregated on the whole according to size, the smaller being inshore. 



(5) Dabs leave the shore feeding grounds much more completely 

 than the plaice. 



(6) In the case of the Forth school the dabs evidently divide 

 in their immigration into a group which enters the Firth on the 

 south side, and a group which crosses the Forth to enter St. Andrews 

 Bay on its south side. 



