{19 



20 to 50 miles. — Fifteen of the lislies, or 21 \ ])qv cent., were recaptured at 

 distances of from 2-ii to 46 miles. Six (18'7 per cent.) were males, with an average 

 migration of 3-i"2 miles, and 8 (21-6 per cent ) were females, with an average of 28 

 niiles. Three of the males were found to the north and east, and 6 to the south and 

 east. Five of the females were recaptured to the north and east, and 3 to the south 

 and east. 



50 to 100 miles. — Nineteen of the recaptured plaice, or 27" 1 per cent., were gol 

 at distances varying from 52^- to 100 miles, namely, 11 males (34'4 per cent.), with 

 an average distance of 73"3 miles, and 8 females (21"6 per cent.), with an average 

 distance of 73-2 miles. All the males and 7 of the females were got to the north 

 and east, at Aberdeen Bank or off the coast of Aberdeen ; the female, which had 

 moved to the south-east, was caught at a distance of 54 miles south-east of St. 

 Abbs Head. 



Over 100 miles. — Sixteen of the fishes, or no less than 22*8 per cent, of the total 

 immber recaptured, had migrated distances of over 100 miles. Eight (25 per cent.) 

 were males, with a mean distance of 164-8 miles, and 8 (21"6 per cent.) were females, 

 with an average distance of 174 miles. Of the males, 4 were recaptured in the 

 Moray Firth, 2 off the Pentland Skerries, and 2 at the Orkney Islands. Five of the 

 females were taken in the Moray Firth, 1 on the north coast of Scotland, at a dis- 

 tance of 208 miles, another to the north-east of Rattray Point, while a third was 

 found 357 miles to the southward, near Ramsgate. 



Ten of the fishes, or 14" 1 per cent., were recaptured within the Firth of Forth, 

 namely, 9 females (24"3 per cent.) and 1 male (3 per cent.). Sixty-one of the fishes, 

 or 85'9 per cent., were recaptured outside the Firth of Forth, and of those, 8, or 

 11"3 per cent., 4 males and 4 females, were taken in the Moray Firth, while 7, or 

 9"8 per cent., had moved further, 4 to the north-east and 1 to the south and east. 



Maturity. 



Males. — Of the 33 males recaptured, the condition of the testes was ascertained 

 in 31. 



Eleven were " spawning," and all but 1 were taken to the north and east. 

 One, of 31-38-3 cm., was got in April 1915, after 1074 days, 15 miles to the south- 

 east, off the Isle of May. Seven were caught off the coast of Aberdeenshire, 5 of 

 them at Aberdeen Bank, to the south-east of Aberdeen, all in February 1913, at 

 distances of from 71 to 74 miles ; the smallest measured 27-33-5 cm., and the largest 

 40-41-3 cm. Another was got to the south-west of the Bank, at a distance of 63 

 miles ; and another in March farther north, near Buchanness, at a distance of 85 

 miles. Two were fomid in the Moray Firth, both in January 1913, near together, 

 on the same day. north-east of Tarbet Ness, at distances of 155 and 156 miles. 

 The remaining male was taken at the Orkney Isles, at a distance of 192 miles. 



Four of the males were " ripe." One was caught in February 1913, at a distance 

 of 36 miles to the south and east, off St. Abb's Head. The second, also taken in 

 February 1913, was found in the Moray Firth, north and east of Tarbet Ness, 

 at a distance of 166 miles. The third was caught in March 1914, 31 miles to the 

 north and east, near the Bell Rock. The fourth was taken in April 1914, with a 

 record from Dundee of " 183 miles north-east of Caithness." 



Four were described as " spent " ; 1, caught in April 1913, 24 miles to the south 

 and east, to the north of St. Abb's Head ; another in May 1913, 15 miles to the 

 south and east, off the Isle of May ; the third, in June 1913, 63 miles to the north 

 and east, at Aberdeen Bank ; and the fourth, in July 1914, farther offshore, to the 

 east of Aberdeen Bank, at a distance of 93 miles frojn the station. 



Three males were " nearly ripe." One was caught in September 1912, 34 miles 

 to the north and east ; another, in December 1912, in the Moray Firth, off Banff, 

 at a distance of 134 miles ; and the third, in January 1913, off the Pentland Firth, 

 at a distance of 164 miles. One male, described as " half-ripe," was caught in 

 October 1912, 32 miles to the north and east, off the Bell Rock. 



Among 8 males of adult size on recapture, and described as " immature," 1 

 each was taken in April, May, Jujie, August, and December, and 3 in September. 

 The one caught in April, after 366 days, measured 32-37-5 cm., -and was taken 46 

 miles to the south and east, to the east of St. Abb's Head. The- one taken in May, 



