84 



Firth of Forth, at a distance of 7 miles to the north and west ; all the other fish were 

 recaptured to the north and east, 1 of the males near Aberdeen, at 70 miles, the 

 other male south-east of Aberdeen, at a distance of 67 miles, 1 of the females east of 

 the Isle of May, at a distance of 20 miles, and the other in the Moray Firth, off 

 Banff, at a distance of 145 miles. 



Thus, in this quarter, 12 fish, or 23-1 per cent., were recovered, 9 (75 per cent.) 

 to the north and east, at a mean distance of 70 miles in the mean direction N. 51° E., 

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



Fourth Quarter. — In March 1914, 3 males and 8 females were got ; 1 of the males 

 was taken 60 miles to the south and east, east of Longstone Light, Northumberland ; 

 another, 18 miles to the north and east ; and the third, 85 miles to the north and 

 east, near Buchanness ; 2 of the females migrated to the south and east, 1 to north- 

 east of St. Abb's Head, a distance of 26 miles, and another to 22 miles S.E. by 

 E. J S. from North Shields, a distance of 105 miles ; 3 were found in the Firth of 

 Forth, 1 ofi Pittenweem, 6 miles to the north-east, and 2 off Buckhaven, 10 miles 

 away to the north and west ; another female was captured 15 miles to the north 

 and east, and 1, 76 miles in the same direction, east of Aberdeen ; the remaining 

 female was found in the Moray Firth, but the precise position was not ascertained. 



In April, 2 males and 2 females were recaptured, all to the north and east, 1 of 

 the males at a distance of 23 miles, and 1 of the females at 35 miles ; the other female 

 was taken off Kinnaird Head, at 119 miles distant to the north and east, and the 

 other male in the Moray Firth, close to Noss Head, at a distance of 170 miles. 



One male and 3 females were recaptured in May, the male 10 miles to the south 

 and east, and all the females to the north and east, 1 south-east of Aberdeen, at a 

 distance of 68 miles, the other 2 off Rattray Head, at distances of 104 and 107 miles 

 respectively. 



In the fourth quarter, therefore, 19 fishes, or 36 "5 per cent., were recaptured, 

 13 (68 per cent.) to the north and east, at an average distance of 69 miles, in the 

 mean direction N. 49° E., 4 (21 per cent.) to the south and east, and 2 to the north 

 and west. 



Thus, in the 12 months after hberation, 34 of the marked plaice, or 65*4 per 

 cent., were recaptured, 24 (71 per cent.) to the north and east, 5 (14*9 per cent.) to 

 the south and east, 4 to the north and west, and 1 to the south and west. 



Of the remaining fishes in this experiment, 10 were recaptured in the remainder 

 of 1914, 7 in 1915, and 1 in 1916. 



In June 1914, a female was taken 73 miles to the north and east, off Aberdeen. 

 In July, 2 females were got, 1 at a distance of 23 miles to the north and east, the 

 other at 77 miles distant to the north and east, north-east of Aberdeen. In August, 

 2 males were recaptured, 1, 13 miles to the north and east, and the other 12 miles 

 to the south and east. In September, 2 males and a female were caught, both 

 the males in the Firth of Forth, 1 off' Pittenweem, 6 miles to the north east, the 

 other off Largo, 9 miles to the north and west ; the female was taken 25 miles to the 

 south and east, off St. Abb's Head. A male and a female were recaptured in October, 

 the male (which was landed at Dundee) described vaguely as having been recap- 

 tured " 8 miles east of the Firth of Forth " ; the female was taken east of the Isle of 

 May, at a distance of 18 miles to the north and east. 



A female was recovered in January 1915, at a distance of 88 miles to the north 

 and east, offshore, to the south-east of Aberdeen. Another female was taken in 

 March, after 665 days, off Dysart, in the Firth of Fortli, 11 miles to the north and 

 west. In April, 2 males and a female were got, the latter 13 miles to the north and 

 east, 1 of the females 35 miles in the same direction, and the other male 68 miles 

 E. by N. of Grimsby, at a distance of 204 miles to the south and east. A male and a 

 female were taken in August, the male off Gosford, on the south shore of the Firth of 

 Forth, at a distance of 9 miles to the south-west, and the female 29 miles to the 

 north and east, oft" the Bell Rock. 



The last fish to be captured was a male, which was taken in February 1916, 

 after 981 days, 27 miles E. f S. of Flamborough Head, 168 miles away to the south 

 and east. 



While the general features of the lines of migration, as shown in the chart for 

 the whole experiment, arc very similar to those in the former experiment, in March, 

 it differs in this respect, that 5 of the recaptured plaice were taken to the soutli of the 



