130 



cent.) were recaptured, and the positions of all of tliem were determined. In 

 September, 5 were taken, 3 males and 2 females. One male and 1 female were 

 got to the south and west, at 5 and 6 miles distant respectively. One male had 

 migrated 32 miles to the north and west, and a male and a female for distances of 

 37 and 41 miles respectively to the north and east. In October, 4 fishes were 

 recaptured 3 males and a female. One male was got 4 miles directly west, a female 

 12 miles north and west, and 2 males at distances of 65 and 69 miles to the north-east. 

 In November, 3 fishes were recaptured, 2 males and 1 female. One male had moved 

 14 miles north and west, another male 73 miles north and east, and a female 52 

 miles in the same direction, both of the latter being taken off the coast of Aberdeen. 



Altogether, in this quarter, 6 of the fishes (50 per cent.) had moved north and east, 

 for an average distance of 56 miles, the mean rate being 1-7 miles per 10 days ; 3 (25 

 per cent.) had gone to the north-west, for an average distance of 19 miles ; and 2 

 (16-7 per cent.) had migrated for a mean distance of 5 miles to the south and west. 



Thus, in the 12 months immediately following Uberation, 96 plaice, or 72-7 

 per cent, of the total number recaptured, were again taken, and the positions of 

 recapture were ascertained for 91 of them. With regard to the direction, 48 

 (52-7 per cent.) had moved north and east ; 23 (25-3 per cent.), north and 

 west ; 11 (12-1 per cent.) south and west ; 5 (5-5 per cent.) south and east ; 3 

 (3-3 per cent.) directly west ; and 1 (1*1 per cent.) directly east. 



These particulars are shown in the following table : — 



