490 Proceedings of Royal Society of Edinburgh. [sess. 
Of the fourteen males, ten were between 70 and 77 cm. Accord- 
ing to Tosh’s results, in August the average length of the female 
is 8T38 c.c. and of the male 77*59. 
These sea-caught fish were therefore smaller than the average 
river-caught fish in October both in length and weight, resembling 
fish caught in the Tweed in August. 
The possibility that this was due to a class of fish entering the 
Tweed in 1902 smaller than that in 1895 and 1896 was considered, 
and I am indebted to Mr James Thomas, Secretary to the Berwick 
Salmon Fisheries Co., for the following note of the weights of fish 
taken in the Company’s fisheries in the different months of these 
three years. These figures show conclusively that the average 
size of the fish had undergone no marked alteration. 
Table VI. 
Month. 
Year 1902. 
Year 1896. 
Year 1895. 
February, . 
7 lbs. 
8 lbs. 
7 lbs. 
March, 
7 „ 
8 ,, 
7 „ 
April, . 
8 „ 
9 „ 
8 
May, . 
8 „ 
9f ,7 
s 
June, . . . 
11 „ 
HI „ 
11 „ 
July, . 
14 „ 
13 „ 
13 „ 
August, 
16 „ 
16 „ 
15 „ 
September, . 
17 „ 
17 „ 
16 ,, 
2 nd — The Development of the Genitalia. 
A. Female Fish. 
Table VII. gives the weight of ovaries — actual, per cent., and per 
fish of standard length, i.e. per fish of 100 cm. long. 
It will be seen at once that these fish may be roughly divided 
into three sets. 
1st. With ovaries over 10 per cent, of the weight of the fish : — 
Nos. 2, 6, 10, 21, 22, 24, 26, — 58 per cent, of the whole. 
2nd. With ovaries between 5 and 10 per cent, of the weight 
of the fish : — Nos. 1, 20, 25, — 33 per cent, of the whole. 
3rd. With ovaries below 5 per cent, of the weight of the fish : — 
No. 4, — 8*3 per cent, of the whole. 
