46 



shire, at a distance of 81 miles, after 413 days ; it measured 33-37*8 cm., and was 

 " spent." The female was also caught in the Moray Firth, after 400 days, but the 

 exact locahty of capture and the condition of the ovaries are unknown ; it 

 measured 35*5-45 cm. 



Two females and 1 male were recaptured in April 1912, 2 to the north and east, 

 and 1 to the eastv/ard. The male, measuring 37-41 2 cm., was caught far ofishore, 

 east of Aberdeenshire (57° 15' N. ; 0° 10' W.), in 44 fathoms, after 444 days, the 

 condition of the testes not being ascertained. One of the females, of 38-44*9 cm., 

 and " spent," was caught near Buchanness, at a distance of 81 miles, after 421 days. 

 The other female, measuring 37*5-44 cm., was taken 29 miles E. J N. of St. Abb's 

 Head, a distance of 48 miles, after 421 days ; the condition of the ovaries was 

 not determined. 



A female, of 43-47 cm., and " spent," was captured in May 1912, after 465 days, 

 in the Moray Firth, off Clyth Ness, a distance of 161 miles. Another female, measur- 

 ing 35*5-43*6 cm., was taken in June, after 505 days, to the south-east of Aberdeen, 

 at a distance of 77 miles, and 1 of 41*5-47*9 cm., and " spent," in July, after 532 

 days, 43 miles to the north and east. In August, a male and a female were cap- 

 lured, the male to the north-east of St. Abb's Head, 34 miles distant, after 545 days, 

 and the female, measuring 31*5-43*3 cm., after 559 days, off Rattray Head, at a 

 distance of 105 miles. Another female, of 37-45 cm., "three-quarters ripe," was 

 also caught off Rattray Head in September, after 575 days, a distance of 110 miles. 

 The other 2 fish taken in 1912 were got in December, a male and a female, both to 

 the north and east. The male, measuring 34*5-40 cm., and " nearly ripe," was 

 caught after 663 days, off the coast of Aberdeen, at a distance of 84 m^les, and the 

 female, of 34-45*2 cm., and "immature," also after 663 days, eastwards of the Bell 

 Rock, at a distance of 45 miles. 



The next fish recaptured was in February 1913 ; it was a male, of 35*5-40 cm., 

 and "spent," taken IJ miles off Banff, in the Moray Firth, at a distance of 134 

 'miles, after 748 days. A female, of 33-41 cm , was caught off Lossiemouth, in the 

 Moray Firth, in June 1913, after 861 days, at a distance of 156 miles. 



Two were captured in July ; a female of 45*5-51 *9 cm., and described as " spent," 

 after 889 days, within the Firth of Forth, off Kirkcaldy, 10 J miles to the westwards ; 

 and a male of 32*5-43*9 cm., after 892 days, 5 miles S.S.W. of Copinshay, Orkney 

 Isles, at a distance of 181 miles. 



The next marked fish captured was a female, which was found in April 1914, 

 after 1148 days, to the east of Holy Island, Northumberland, at a distance of 53 

 miles from the place of liberation ; it measured 32*5-47*5 cm., and was described as 

 " spent." 



The last fish to be taken was a male, measuring 34-43*1 cm., which M^as recap- 

 tured 'n September 1914, after 1306 days, 7 miles S.E. of Fair Isle, at a distance of 

 212 miles. 



Distances travelled — Under 10 miles. — Eleven of the recaptured fish, or 20*4 per 

 cent., were taken at distances not exceeding 10 miles, viz. 4 males (16*6 per cent.), 

 with an average of 4*5 miles, and 6 females (21*4 per cent.), with an average of 

 4*3 miles, and 1, whose sex was not known, had migrated 7J miles. All these fish 

 were taken on the north side of the Firth of Forth, off the coast of Fife, 5 off Larf.o, 



1 off Ehe, 1 off Methil, and the remainder off Pittenweem, at Station VI., where 

 they were originally caught for the marking exj)eriment. While some of these 

 fish, which had remained in the Firth were caught within a short time after liheia- 

 tion, in from 22 to 41 days, 2 of them had been for a year and more, both males, 

 one of 29-33*3 cm., and therefore under the adult size, for 383 days; it was "im- 

 mature " when taken in February, and the other, measuring 29-35*8 cm., taken in 

 March, and also "immature," for 391 days. None of the fish was of adult size 

 when recaptured. 



10 to 20 miles. — Five (9*4 percent.) were recaptured between 10 and 20 miles, viz. 



2 males (8*3 per cent.), with an average distance of 18 miles, and 3 females (10*7 per 

 cent.), with an average distance of 13 miles. The 2 males were caught to the east- 

 wards, outside the Firth, at distances of 17 and 19 miles. One of the females was 

 also taken to the north-east, off Fife Ness, at a distance of 18 miles, after 14 days. 

 Both the other females were caught in the Firth of Forth, oft' Kirkcaldy, at distances 

 of between 10 and 11 miles, 1, measuring 37*5 cm. on liberation, but of unknown 



