60 



1 female. One of the males was got on the north coast of Scotland, at a distance 

 of 213 miles. The other three fishes, 2 males and a female, were all got to the 

 south and east, the female off Scarborough, 137 miles distant, 1 of the males off 

 Whitby, at a distance of 122 miles, and the other male 21 miles east of Flamborough 

 Head. The mean rates of movement of the 3 males were respectively 6, 1'38, and 



1 mile per 10 days. Fourteen of the fishes, or 40 per cent., were taken within 

 the Firth of Forth, namely, 5 males (31"25 per cent.), 7 females (50 per cent.), and 



2 of unknown sex (40 per cent.). All the other fish were got to the south of Kinnaird 

 Head, except the male, which was taken on the north coast of Scotland. 



Maturity. 



Males. — The only male, which was " spawning " on recapture, was the one taken 

 in January 1916, off Flamborough Head. 



Two were described as " ripe," the one found oft" Whitby in February 1914, at 

 a distance of 122 miles, and the other in February 1913, on Aberdeen Bank. 



One was " nearly ripe " ; it also was captured on Aberdeen Bank in January 

 1913. 



A male, caught in February 1912, near Buchanness, and measuring 35-35*3 cm., 

 was described as " fully half ripe." 



Among those of adult size whose testes were "immature," 3 were taken within 

 the spawning season, 1 in March 1912, and measuring 34-35*3 cm., at EUe, in the 

 Firth of Forth ; another, measuring 31-36*8 cm., in April 1913, at Largo, in the 

 Firth of Forth ; the third, caught in April 1912, to the north-east, off the Bell 

 Rock, measured 32*5-33*6 cm. 



Females. — No female was " spawning " or " ripe," or " nearly ripe." Two 

 were described as '"spent," 1, of 35-39*7 cm., taken in June 1913, to the east of 

 the Bass Rock, at a distance of 15 miles ; the other, of 28-44*2 cm., in April 1916, 

 at 51 miles almost directly east, in the offshore waters. Among those described 

 as " immature," was 1 of 37-39 cm., taken in February 1912, off Pittenweem, in 

 the Firth of Forth ; it was " rather immature " ; 1, of 37*5-44*1 cm., caught in 

 March 1913, 24 miles to the north and east ; 1, of 35*5-39*9 cm., taken in March 

 1913, at Aberdeen Bank, and 1, of 36*5-39*9 cm., caught in May 1912, 43 miles 

 to the north and east. Among those under adult size on recapture, 3 were taken 

 within the Umits of the spawning season, 1, of 37-37*7 cm., in March 1912, near 

 Largo, in the Firth of Forth ; another, of 25*5-26 cm., also in March 1912, off 

 Leven, in the Firth of Forth ; 1 in April 1912, to the westwards, near Bo'ness, in 

 the Firth of Forth. One fish whose sex is not recorded, measuring 33*5-37*9 cm., 

 was taken in February 1913 on Aberdeen Bank. 



EXPERIMENT VII. 



eth March 1912. 



In this experiment, 100 fishes were liberated, 27 males, 70 females, and 3 whose 

 sexes were not ascertained. The sizes of the males ranged from 26 to 38*5 cm , 

 and of the females, from 29 to 59*5 cm. Eleven of the males and 36 of the females 

 were under the adult size when they were liberated. 



The numbers liberated and recaptured are shown on the table below, arranged 



in 5-cm. groups : — 



cm cm. cm. cm. cm. cm. 



'25-30-5 31-:35-5 36-405 41-455 4G-50-5 51-55-5 



F. Lib. .. 6 17 30 12 1 1 



F. Recap. 



M. Lib. 



M. Recap. . 



? Lib. ... — 1 2 — — — — 3 



? Recap. .. — — — — — — — — 



The lish were trawled by the " Goldseeker," at Station VL, in the Firth of 



