42 



126 days, off Aberdeen, at a distance of 72 miles ; it measured 33"5-35 cm. ; the 

 other, measuring 39-43*7 cm., was taken off Whiten Head, on the north coast of 

 Scotland, in July 1911, after 235 days, at a distance of 226 miles. 



Four males were " ripe," all taken to the northwards. One, measuring 38'5-38'7 

 cm., was caught in February 1911, after 77 days, 24 miles distant, to the east of 

 the Isle of May i the second, of 39-39-7 cm., was caught in March 1912, after 

 475 days, near Buchanness, at a distance of 86 miles ; the third, measuring 33-36' 1 

 cm., was taken, also in March 1912, by cod-nets, at Whitehills, Moray Firth, at a 

 distance of 137 miles ; the fourth had migrated farther, being taken in May 1912, 

 after 546 days, off the north coast of Scotland, 26 miles N.W. by N. from Dunnet 

 Head, a distance of 214 miles ; it measured 40'5-46"3 cm. The mean rates of 

 movement per 10 days in the cases of these fish were, respectively, 3"1, r8, 2'8, 

 and 3' 9 miles. 



Four males were described as " nearly ripe " ; they were all recaptured to the 

 northwards. One, measuring 42-44 cm., was taken in November 1911, after 

 357 days, at a distance of 28 miles, north and east of the Bell Eock ; another, of 

 35-38'4 cm., was taken in February 1912, after 453 days, off Aberdeen, at a distance 

 of 72 miles ; the third, measuring 3r5-37"4 cm., was captured, by a cod-net, also 

 in February 1912, after 455 days, in the Moray Firth, at the entrance to the Dornoch 

 Firth, a distance of 167 miles ; and the fourth, measuring 3r5-41'2 cm., was 

 caught in November 1912, after 721 days, off Aberdeenshire, at a distance of 

 87 miles. The mean rates of movement in these cases were, respectively, -8, 1*6, 

 3-7 and 1-2 miles. 



Of the 4 males of adult size, whose testes were " immature," one was taken in 

 March 1911, after 108 days, off Buchanness, at a distance of 85 miles ; another, 

 of 34-35 cm., was caught in April 1911, after 139 days, 12 miles to the west, near 

 Inchkeith ; the third was found on 5th May, after 161 days, 44 miles to the north 

 and east ; it measured 33'5-33'8 cm. ; the fourth, of 36'5-38"2 cm., was taken in 

 September 1912, after 670 days, 36 miles to the north and east ; a male, measuring 

 31-31*8 cm., was caught in March 1911, 7 miles to the north and west, off Anstruther, 

 Firth of Forth. 



Of the 33 adult females recaptured, the condition of the ovaries was determined 

 in 31 cases. 



Five were "spawning," but the position of capture, and the date, were not 

 ascertained for one of them. Three of the other 4 were got to the north and east, 

 1, of 41-5-45-8 cm., in March 1913, after 857 days, in the Moray Firth, off White- 

 hills, at a distance of 136 miles ; it was taken in a cod-net. Another, measuring 

 47'5-47'6 cm., was caught off Aberdeen Bay in February 1911, after 86 days, a 

 distance of 72 miles ; the third was taken a little farther north, in March 1912, 

 after 487 days, the distance being 81 miles ; it measured 41"5-47-l cm. The 

 fifth fish was captured in February 1914, after 1169 days, 24 miles E. by S. of Hartle- 

 pool, having migrated a distance of 122 miles to the south and east ; it measured 

 52-54"5 cm. The mean rates of migration of those four fish were as follows : — 

 1-64, 8-4, 1-7, 1-04 miles per 10 days. 



One adult female is described as " ripe " ; it measured 54-53"6 cm., and was 

 caught in March 1911, after 112 days, 29 miles to the north and east, off the Bell 

 Eock. 



Four were described as " spent," all captured to the north and east. One, of 

 39-41 cm., was taken in May 1911, after 174 days, 35 miles distant, east of the 

 Bell Eock ; the second, measuring 39*5-4r4 cm., was caught in June 1911, after 

 188 days, off Tod Head, 58 miles distant ; the third, measuring 36-5-45-7 cm., 

 was taken in July 1912, after 586 days, east of Auskerry, Orkney Islands, 189 miles 

 distant ; and the fourth, of 37-46-1 cm., was also caught in July 1912, after 597 days, 

 off the Aberdeenshire coast, at a distance of 82 miles. The mean rates of travel, 

 per 10 days, were respectively 2, 3*1, 3-2, and 1-4 miles. 



Six were " nearly ripe." One was caught 25 miles to the south and east in 

 March 1913, after 837 days ; it measured 36-45*5 cm. All the others weie taken 

 to the north and east ; 1, in December 1912, after 759 days, 49 miles distant ; it 

 measured 36-5-43 cm. ; another, of 37-41*6 cm., in December 1911, after 397 days, 

 off Buchanness, at a distance of 87 miles ; the fourth, of 36-39*6 cm., in March 

 1912, after 464 days, 73 miles distant, off Aberdeen ; the fifth, of 40*5-46*6 cm., 



