98 



The summary of the resultant direction and distance in each qMadian' is as 

 follows — 



Distances travelled. — The number recaptured at distances of 10 miles or under 

 from the station was 9, or 28-1 per cent., viz. 4 males and 5 females, the average 

 distance being 5-5 miles. Between 10 and 20 miles, 4, of which 3 were males, were 

 recaptured, so that the total number under 20 miles was 13, or 40-6 per cent., the 

 average distance being for the males 8-8 miles and for the females 7-7 miles. 



20 to 50 miles. — The number recaptured between 20 and 50 miles was 12, or 

 37-5 per cent., of which 2 were males, with an average distance of 32 miles, and 

 10 were females, with an average of 28-2 miles. 



50 to 100 miles. — No males were recaptured at distances of over 50 and iinder 

 100 miles, but 4 females went to the north-east for from 51 to 74 miles, the mean 

 being 61-5 miles. 



Over 100 miles. — -Three males were recaptured at distances of 126, 154, and 

 160 miles, 2 in the Moray Firth, and 1 at the Orkney Isles, the mean rate of migra- 

 tion per 10 days being respectively 3-5, 4-5,. and 4-5 miles. As already stated, 2 of 

 these fish were " ripe " ; the condition of the testes of the third wds not ascertained 



It is interesting to note that the male fish which was taken at Auskerry, la 

 the Orkney Isles, had been previously marked and recaptured. It was originally 

 marked and liberated on 8th February 1911, in the Firth of Forth, midway between 

 Ehe and Fidra, and was caught by the " Goldseeker " on 21st March 1911, at 

 Station VI. in the Firth of Forth, off St. Monans, among the fish taken for the 

 present experiment. 



Maturity. 



Males. — The condition of the testes was ascertained in 7 of the 11 males 

 recaptured. Three were "ripe," taken respectively in February, March, and April 



