40 



after 597 days, ofishore, to the east of Aberdeen, at a distance of 82 miles, and 

 the other, of 36-5-45-7 cm., and also " spent," to the east of the Orkney Isles, at 

 a distance of 189 miles. 



In September, a male, of 36-5-38"2 cm., was, caught, after 670 days, 36 miles 

 distant, to the east of the Isle of May, and the female, of 36-5-47-8 cm., after 

 668 days, offshore, to the south-east of Buchanness, at a distance of 93 miles. 



A male, of 31-5-4r2 cm., and "nearly ripe," was got in November, after 721 

 days, south-east of Buchanness, at a distance of 87 miles. 



In December, after 759 days, a female, measuring 36-5-43 cm., and "nearly 

 ripe," was recaptured 49 miles to the north and east, east of the Isle of May. 



In February 1913, a male of 36-5-42-1 cm., and " spawning" (" partly spent "), 

 was recaptured, after 820 days, off Berriedale Ness, in the Moray lirth, at a distance 

 of 164 miles. 



In March 1913, 2 females were taken, 1 after 837 days, measuring 36-45-5 cm., 

 and " nearly ripe " 25 miles distant, to the east of the Isle of May ; the other, 

 measuring 41*5-45-8 cm., and " spawning " was recaptured in the Moray Firth 

 off Whitehills, at a distance of 136 miles, after 857 days. 



A female was recovered in November 1913, after 1074 days, in the offshore 

 waters, off Tod Head, at a distance of 65 miles to the north and east ; it measured 

 33-44-5 cm., but the condition of the ovaries was not recorded. 



Of the two fish recaptured in 1914, both females, 1, which measured 52-54*5 cm., 

 was taken in February, after 1169 days, off Hartlepool, at a distance of 122 

 miles to the south and east ; it was " spawning." The other female, measuring 

 42-5-55*3 cm., and " about three-quarters ripe," was recovered in December, 

 offshore, to the south-east of Aberdeen, at a distance of 69 miles. 



Distances travelled, 10 fniles and under. — Three of the marked plaice, or 4*5 per 

 cent., were recovered within 10 miles of the station, 2 males, 1 taken off Pittenweem 

 at a distance of 5 miles, and the other off Anstruther at a distance of 7 miles, and a 

 female, which was got to the westward, near Inchkeith, at a distance of 8 miles. 



10 to 20 miles. — Four fish, or 6*1 per cent., were recaptured, 2 males and 

 2 females. One of the males travelled westwards for 12 mile's, to the neighbour- 

 hood of Inchkeith, and the other, 17 miles to the south-east, outside the Forth. 

 The two females were found at a distance of 18 miles to the north-east. 



Under 20 miles. — Thus, 7 fish, or 10-6 per cent., 4 males (16 per cent.) and 3 

 females (7-9 per cent.) were found within a distance of 20 miles from the place 

 of Uberation. 



20 to 50 miles. — Seventeen of the plaice, or 25-8 per cent., nngrated distances 

 of between 20 and 50 miles. Four (16 per cent.) were males, all of which were found 

 to the north and east, the average distance being 33 miles. Twelve (31-6 per cent.) 

 were females, which had also moved an average distance of 33 miles, all but two 

 to the north and east ; one of the other fishes was found 25 miles to the south and 

 east, and 1, 39 miles directly east. One, whose sex was not determined, was got 

 38 miles to the south-east. 



50 to 100 miles. — Twenty of the fish (30*3 per cent.) migrated aistances between 

 50 and 100 miles. Of these, 6 (24 per cent.) were males, all of which had gone to 

 the north and east, from 72 to 92 miles, the mean being 82-3 miles. Fourteen 

 (36-8 per cent.) were females, which had migrated distances of from 58 to 93 miles, 

 also to the north and east, the average distance being 75*3 miles. 



Over 100 mifes.-^Twenty-two fish (33*3 per cent.) moved distances exceeding 

 100 miles. Fileven (44 per cent.) were males, all of which had gone to the north 

 and east for an average distance of 194 miles, 6 being taken in the Moray Firlh, 

 and 5 farther north, 3 of them at distances of 214, 225, and 226 miles, on the north 

 coast of Scotland, while 2 had travelled to the west coast and were caught at Loch 

 Inchard, a distance of 256 miles from the station. Nine (23-7) per cent, were females, 

 which had moved an average distance of 140 miles. Seven of these Avere taken to 

 the north and east, 1 in the Moray Firth, at a distance of 136 miles and the others 

 at distances of from 130 to 189 miles, off the Moray Firth, and the Orkneys. Two 

 of the females had taken an unusual direction to the south and east, 1 being 

 captured 105 miles distant, 50 miles off Whitby, and the other, 122 miles, 24 miles 

 off Hartlepool. Two whose sexes were not known were taken in the Moray Firth. 

 In tlus experiment, 5 males, or 20 per cent., migrated distances over 200 miles, 



