270 



45i miles north and west, tlie third 9 miles S.S.W. from Foula (59° 58' N. ; 2° 5' W.), 

 at a distance of 141 miles. 



A female was recaptured in June, at only 7| miles distant to the north 

 and west. 



In this quarter, 7 of the marked plaice, or 13 "5 per cent., were recaptured, 5 

 (71*4 per cent.) at an average distance of 41 miles in the mean direction N. 51° W., 

 and 1 to the north-east, and 1 to the south-west. 



Altogether, within the 12 months after liberation, 40 of the marked plaice, or 

 76-9 per cent., were recaptured, 19 (47 '5 per cent.) to the south and west, 18 (45 

 per cent.) to the north and west, 2 (5 per cent.) to the north-east, and 1 to the south- 

 east. These particulars are summarised in the following table : — 



Of the remaining fish of the experiment recaptured, 3 were taken in the 

 remainder of 1913, 4 in 1914, and 1 in 1916. 



A male was taken in July 1913, 13 miles to the north and west. In August, a 

 female was got in the offshore Avaters, at a distance of 57| miles to the south and 

 east. In September, a female was found 24 miles to the north-west, north-east of 

 Kinnaird Head. 



In January 1914, a male and a female were taken, both to the south and M'est, 

 at distances respectively of 41 and 28 miles, the male in the offshore waters, and 

 the female inshore, near Aberdeen. In March, a male was captured in the Moray 

 Firth, near Clythness, at 64 miles distant. In July, another male was taken off- 

 shore, at a distance of 48 miles to the south and west. 



The last fish to be recaptured was a female, in May 1916, after 1397 days, at a 

 distance of 17 miles to the south and west. 



The chart for the whole of this experiment shows a concentration of the fish, 



