164 



other, of 31'5-33"4 cm., was taken north-east of St. Abb's Head, at a distance of 

 24 miles to the south and west, after 135 days. One of the females, of 33-34"8 cm., 

 was recaptured, after 146 days, to the north-east of St. Abb's Head, at a distance 

 of 31 miles to the south and west ; another, of 40-5-42'8 cm., was caught, after 

 125 days, south-east of Aberdeen, at a distance of 32 miles to the north and east ; 

 the remaining female, measuring 37'5-37-6 cm., was caught at Tod Head, at a 

 distance of 44 miles, after 140 days. 



Three males and 3 females were recaptured in December 1912 ; one of the 

 males, which measured 36"5-38'2 cm. and was " three-quarters ripe," was taken, 

 after 159 days, 6| miles to the south and west ; another, of 37"5-39 cm., was caught, 

 after 165 days, 15 miles to the south and west ; and the third, of 37"5-37"6 cm., 

 and "spawning" ("partly spent"), was recaptured, after 162 days, south-east 

 of Aberdeen, at a distance of 38 miles to the north. The position of recapture 

 of one of the females was not ascertained ; one of the others, measuring 39'5- 

 41"2 cm., and " immature," was taken, after 158 days, 16| miles to the north- 

 west ; and the other, of 39-40 cm., was caught, after 157 days, east of St. Abb's 

 Head, at a distance of 22 miles to the south and west. 



Thus, 15 plaice, or 21*1 per cent., were recaptiired in this quarter, the position 

 of capture being recorded for 14 ; of these, 7 (50 per cent.) were found to the south 

 and west, 3 (21*4 per cent.) to the north and west, 2 to the north and east, and 

 1 each to the south and east, and to the north. 



Third Quarter. — Four males and 3 females were recaptured in February 1913. 

 Four were got in the same locality, at Aberdeen Bank, viz. 3 males and a female. 

 The males measured respectively 35"5-38-l cm.. 38-39*1 cm., and 39-5-4r4 cm. ; 

 the first and the third were " spawning," and the second " ripe " ; they were taken, 

 the first and second, after 223 days, at a distance of 37 miles, and the third, after 

 235 days, at a distance of 35J miles to the northwards. The female, which measured 

 41-41-9 cm., and was "spawning," was taken, after 230 days, at a distance of 

 35 miles. The remaining male, measuring 34-35*9 cm., was recaptured, after 

 213 days, in the Moray Firth, off Banff, at a distance of 110 miles, and was " ripe." 

 The other 2 females were recaptured in the Firth of Forth ; 1, measuring 33-36"3 

 cm., after 237 days, off Pittenweem, at a distance of 55 miles to the westwards ; 

 the other, of 38'5-39'2 cm., farther to the west, off Buckhaven, at a distance of 

 65 miles, after 231 days ; both were " immature," 



Three females were recaptured in March ; 1, of 32-33"7 cm., and " immature," 

 after 251 days, at Aberdeen Bank, at a distance of 38 miles to the north and west ; 

 another, of 30-5-33-8 cm., after 262 days, near Pittenweem, in the Firth of Forth, 

 at a distance of 56 miles to the westwards ; and the third, of 52 cm., when set 

 free, but of unrecorded size on recovery, after 257 days, in the Moray Firth, 18 

 miles E.S.E. from Noss Head, at a distance of 131 miles. 



In the third quarter, then, 10 of the marked plaice, or 14" 1 per cent., were taken, 

 7 (70 per cent.) to the north and west, and 3 to the north and east. 



Fourth Quarter. — A male and a female were recaptured in April, the male, of 

 30-33-2 cm., and "immature," after 277 days, in the Firth of Forth, 1 mile off 

 Pittenweem, 56 miles to the westwards, and the female, of 30-5-32-2 cm., and also 

 " immature," after 269 days, 25 miles to the north and west. 



Four males and 2 females were taken in May ; the 2 females, both " immature," 

 were recaptured in the same locahty north-east of the Bell Kock, after 311 and 313 

 days, 1 measuring 34-39 cm., and the other 29-30-4 cm., and the distances migrated 

 were 22 and 20 miles to the north and west ; one of the males, of 40-40 cm., and 

 "spent," was caught, after 302 days, at a distance of 15J miles to the south and 

 west ; another, of 32*5-36-2 cm., was taken, after 326 days, 19 miles to the north 

 and west ; another, of 33*5-36 cm., after 314 days, far offshore, east of Buchan- 

 ness, at a distance of 84 miles to the north and east, the condition of the testes 

 not being stated ; the remaining male, which measured 33-35'9 cm., and was 

 "spent," was recaptured, after 301 days, off Rona Island, which Ues in the Atlantic, 

 north-west of Cape Wrath, at a distance of 247 miles from the place of hberation. 



Three females and a male, all " immature," were caught in June, the male, 

 of 34-37-8 cm., after 335 days, near the Isle of May, 40 miles to the westwards ; 

 one of the females, of 38-41 cm., after 352 days, north-east of Longstone Light, 

 at a distance of 36 miles to the south and west ; another, of 34-5-38-3 cm., after 



