255 



north and west, 2, taken on the same day, at 10 miles and the third at 25 miles 

 distant. 



In this quarter, 44 of the marked plaice, or 37-9 per cent., were recovered, but 

 the position of 1 was not ascertained. Of the remaining 43 (37"1 per cent.), 20 were 

 found to the south-east, at a mean distance of 19 miles in the mean direction S. 

 56° E. ; 10 (23-2 per cent.) went an average distance of 18 miles m the mean direc- 

 tion S. 22° W. ; 7 (16 per cent.) went 31 miles in the mean direction N. 49° W. ; 

 and 6 (13'9 per cent.) went an average distance of 6 miles in the mean direction N. 

 23° E. On the migration chart, the majority of the lines are to the eastwards and 

 southwards. 



Second Quarter. -—None was caught in September, but 2 males and 3 females 

 were takeji in October, 1 of the males 39 miles to the south and west, and the other 

 35 miles to the south and east. Of the females, 1 was taken 15 miles to the north 

 and west, and the other 2 at 12 and 19 miles to the north and east. 



Six males and 6 females were recaptured in November. Two of the males were 

 found at 15 and 51 miles to the north and east, 2 at 45 and 47 miles to the north 

 and west, 1 at 57 miles to the south and east, and 1 at 220 miles to the south and 

 east, at Borkum Riff (about Lat. 54° N. ; Long. 6° E.), the mean rate of movement 

 being 13-7 miles per 10 days ; this fish measured 37-37 cm., and was landed at Altona 

 by a German trawler. The place of recapture of 1 of the females was not ascer- 

 tained ; of the others, 2 had travelled distances of 17 and 42 miles to the north 

 and west, and 2 were taken by a German trawler 39 miles N.-W. | W. of Hanst- 

 holm, in the mouth of the Skagerak, Denmark, at 142 miles distant to the south and 

 east. The remaining female is stated to have been taken at a distance of 225 

 miles to the north and east (Lat. 60° 20' N. ; Long. 3° 10' E.), the mean rate of move- 

 ment representing 13*7 miles per 10 days ; this fish was captured by a German 

 trawler and landed at Hamburg. 



In this quarter, therefore, 17 fish, or 14-6 per cent., were recaptured, but the 

 position of 1 w^as not recorded. Of the others (13'8 per cent.), 5 were taken to the 

 north and east, at an average distance of 64 miles ; 5 to the north-west, at a mean 

 distance of 33 miles ; and 5 to the south-east, at an average distance of 119 miles ; 

 while 1 was foimd to the south and west. 



Third Quarter. — A male and a female were recovered in December 1910, at 

 distances of 40 and 43 miles to the north and east. 



A male was got in January 1911, 37 miles to the north and east, and a female 

 in February, 88 miles to the north and west. 



Thus, in the third quarter, only 4 of the marked plaice, or 3"4 per cent., were 

 recaptured, 3 to the north and east, and 1 to the north and west. 



Fourth Quarter. — None was taken in March, but in April a male and 3 females - 

 were caught, 1 female 21 miles to tne south and east, another 14 miles to the north 

 and east, and the third 14 miles to the north and west ; the male was taken 45 miles 

 E. I S. of Aberdeen, at a distance of 137 miles to the westward, and landed at 

 Aberdeen. 



In May, 8 males, 14 females, and 1 of imknown sex were recaptured ; the position 

 of capture of 1 of the males was not ascertained ; 3 were found to the north and 

 east, at distances of 10, 11, and 13 miles ; 1 at 36 miles to the nortli and west ; 

 another 12 miles to the south and east ; and 2 at 5 and 16 miles to the south and 

 west. Of the females, 3 were found to the north and east, at distances of 5, 10, and 

 41 miles respectively ; 8 were recaptured to the north and west, at distances of 2, 

 11, 15, 17, 19, 34, 47, and 52 miles ; 1 was got 18 miles to the south and east, and 2 

 to the south and west, 1 at 13 miles and the other at 130 miles distant, to the east 

 of Hartlepool. 



In the fourth quarter, 27, or 23-3 per cent., of the marked plaice were recaptured, 

 but the position of capture of 2 was not recorded. Of the remaining 25 (21-5 per 

 cent.), 11 (44 per cent.) were found at an average distance of 35 miles in the mean 

 direction N. 55° W. ; 7 (28 per cent.) at an average distance of 15 miles in the mean 

 dirert'on N. 22° E. ; 4 (16 per cent.) at an average distance of 41 miles S. 46° W. ; 

 and 3 (12 per cent.) to the south and east. 



Thus, in the 12 months, 92, or 79'3 per cent., were recaptured, the positions 

 of 4 not being ascertained. Of the remaining 88 (75"9 per cent.), 28 (3r8 per cent.) 

 were taken to the south and east ; 21 (27"3 per cent.) to the north and west ; 21 



