217 



distance of 8 miles, in February 1914, 2 of the others in the Moray Firth, at distances 

 of 106 and 119^ miles, in March and February 1914, while the third was captured 

 off the north coast of Scotland, in February 1914, at a distance of 150J miles ; 

 the rate of travel of the last fish was 9-1, 11-2, and 15 miles per 10 days of freedom. 



Three were "ripe," 1 taken 4 miles to the north-west, in January 1914, 1, 42 

 miles to the south and west, in February 1914, off the Bell Rock, and the third 

 in the Moray Firth in March 1914, at a distance of 110 miles. 



One was described as " nearly ripe " ; it was taken in November 1913, 48 

 miles to the south and west, off the Bell Rock. One, said to be " three-quarters 

 ripe," was got in November 1915, 13 miles to the north and west. 



Among those of adult size described as " immature " were 2 taken in February 

 1914, 1, 15| miles to the south and west, which measured 36-36-3 cm., and the 

 other, taken in the Moray Firth, at a distance of 74 miles, and measuring 37-5- 

 37-7 cm. ; the third was captured in February 1915, 4 miles to the north and 

 west, and measured 31-5-41 cm. 



Females. — The condition of the ovaries was ascertained in 25 of the 26 females 

 recaptured. 



Two were "spawning," 1 taken in January 1914, 35 miles to the north and 

 west, ofE Buchanness, and the other in March 1914, in the Moray Firth, at a 

 distance of 110 miles. 



One was described as " ripe " ; it was caught in January 1914, at a distance 

 of 52 J miles ti the south and west, south of the Bell Rock. 



Five were said to be " spent " ; 4 were taken in June 1914, 3 of them to the 

 north-west at 9, 12|, and 12 J miles, and the fourth 21 miles to the south and west, 

 and 1 in May 1914, 15i miles to the south and west. 



Three were " nearly ripe " ; they were all taken to the north and west, 1 in 

 November 1913, at a distance of 26 miles, 1 in December 1913, at 23 miles, and 

 the third in February 1914, at a distance of 32 miles. Two were described as 

 "about thiee- quarters ripe," 1 taken in January 1915, 32 miles to the north and 

 west, the other ir September 1915, 8 miles to the north and west. 



Of those of adult size on recapture, whose ovaries were " immature," 5 were 

 taken vnt\\\\\ the limits of the spawning season, 2 in January 1914, both at 10 

 miles to the north and west, and measuring respectively 40-40-5 cm., and 42-5- 

 42-7 cm. : 1 was taken in March 1914, 4| miles to the north and west, and measured 

 36-5-39 cm. ; 1 was caught in April 1914, 37|- miles to the south and west, 

 measuring 38-5-41-2 cm. ; another in April 1915, 24 miles south and west, 

 measuring 34-42-2 cm. 



Experiments Near Fair Isle. 



In the neighbourhood of Fair Isle, 8 experiments were made, extending from 

 4th November 1910 to 22nd November 1912, 940 plaice being marked and liberated, 

 of which 371 were males, 551 females, and 18 of unknown sex. 



The number recaptured was 461, or 49 per cent., viz. 180 males (48-5 per cent.); 

 275 females (49-9 per cent.), and 6 of unknown sex (33-3 per cent.). 



