198 



March, another female, of 31-5-40-5 cm., and " immature," was caught 28 miles 

 to the south and west, and in October, after 1188 days, the last fish, a female, of 

 34-5-52 cm., and " rather immature," was recaptured only 10 miles distant, to the 

 north and west. 



The following table gives a summary of the mean distance and direction, in each 

 quadrant, for all the fish of the experiment : — 



Distances travelled — 10 miles and under. — Eight of the marked plaice, or 12' 9 

 per cent., were recaptured at distances of from 3 to 10 miles, 5 males (16*1 per cent.), 

 with an average of 6*7 miles, and 3 females (9' 7 per cent.), with an average of 8*3 

 miles. Three of the males and 2 of the females were found to the north and west, 1 

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

 east. 



10 to 20 mile.'). — Seven, or 11-3 per cent., were taken at distances of from 10| to 

 19 miles, 3 males (9-7 per cent.), with an average of 15-3 miles, and 4 females (12-9 

 per cent.), with an average of 13-4 miles. One of the males and 1 of the females were 

 found to the north and west, 2 males to the south and east, 2 females to the south 

 and west, and 1 to the west. 



