The next was a female captured in March 1913, only 2 miles to the south and 

 west. In May, a female was said to have been taken in the Firth of Forth, ^ mile 

 off Portobello, on the south shore, having migrated a distance of 247 miles to the 

 westwards, in 322 days, or at the mean rate of 7-7 miles per 10 days ; this fish was 

 sent from a firm at Leith, with an intimation that it was caught in a crab-net at the 

 above locaUty. In June, a female was recovered 34 miles to the soath and west. 

 In August, a male 36 miles to the south and east ; and in September, 2 females, one 

 62 miles to the south and west, and ojie 94 miles to the north and west. In 

 December, a female was taken 18 miles north of Hanstholm Light, 145 miles to the 

 south and east. 



In January 1914, a male had gone 86 miles to the south and east. In April, a 

 female was recaptured 97 miles to the south and east, in July a )nale 32 miles to the 

 south and east, in August 2 males to tne north and west, at 48 and 50 miles. 



No other fish from this experiment was recaptured until December, 1915, when 

 a female was found, after 1293 days, on the Sylt Ground, 179 miles to the south and 

 east. 



Distances travelled — 10 miles and under. — One fish, a female, was caught 2 miles 

 to the south and west, after 263 days. 



None was recaptured between 10 and 20 miles. 



20 to 50 miles. — Five, or 33-3 per cent., were taken at distances of from 27 to 48 

 miles, 3 males (60 per cejit.), with an average of 39 miles, aiid 2 females (20 per cent.), 

 with a mean of 30-5 miles. Two of the males and 1 of the females were taken to 

 the south and east, 1 male to the north and west, and 1 female to the south and 

 west. 



50 to 100 miles. — Six, or 40 per cent., were recaptured at distances of from 50 to 

 97 miles, 2 males, with an average of 68"25 miles, and 4 females (40 per cent.) with 

 an average of 81-6 miles. One male and 1 female went to the south and east, 1 

 male and 1 female to the north and west, and 2 females to the south and west. 



Over 100 mile.-i. — Tliree fish, or 20 per cent., were recaptured at distances of from 

 145 to 247 miles ; they were all females (30 per cent.), and 2 were taken to the 

 south and east, 1 off Hansthohn Light, and another on the Sylt rxround ; the third 

 is described as having been found in the Firth of Forth, 247 miles to the westwards. 



Maturity. 



As the condition of the reproductive organs was not recorded in the fish landed 

 at foreign, or at most English, ports, little can be said on this subject. The female 

 recorded as having been captured in the Firth of Forth measured 28-31-2 cm., and 

 was, of course, " immature." A female, taken in September 1913, 62 miles to the 

 south and west, was described as " mature " ; it measured 45'5-48 cm. ; a male, 

 taken in August 1913, 36 miles to the south and east, was " about half mature." 



The remaiaing experiments in the region of the Grreat Fisher Bank were as 

 follows : — 



On 14th June 1912, 3 females and 2 of unknown sex, caught locally, were marked 

 and hberated at 57° 16' N. ; 4° 8' E., and 1 female was recaptured oji the 9th July 

 following, 4J miles to the westwards. 



On the same day, 13, also taken locally, were liberated at 57° 19' N. ; 4° E., com- 

 prising 4 males, 7 females, and 2 of unknown sex. Four, or 30*8 per cent., were 

 recaptured, 2 males and 2 females. One of the males was found in September 1913, 

 34 miles to the south and east, and the other in July 1912, 7 miles to the north and 

 east. One of the females was got in July 1912, 7 iniles to the north and east, and 

 the other in November 1913, after 506 days, 17 miles to the south and east. 



Three females, caught in the vicinity, were marked and set free also on the 14th 

 June, at 57° 15' N. ; 3° 52' E., but none was recaptured. 



Experiment at 22 Miles S.S.E. from Cruden Scaurs. 



8th March 1912. 



One experment was made at this locality, which hes 22 miles S.S.E. of Cruden 

 Scaurs, or 25 miles S. 10° E. of Buchanness (Lat. 57° 6' N.; Long. 12° 5' W.), with a 



