494 Proceedings of Royal Society of Edinburgh. [sess. 
No. 10. 
Thick. 
Thin. 
Ovaries. 
Fats, 
. '5/4 ... 
7-9 . 
.. 97 
Solids, 
. 297 ... 
31/6 . 
.. 42-1 
CD 
6 
J2J 
Fats, 
. 3*25 ... 
6-41 . 
... 7-5 
Solids, 
. 26*09 ... 
30*46 . 
... 39 D 
Number 4, in the composition of its flesh as well as in the size 
of its ovaries, corresj3onded to a fish in the end of June. 
Numbers 1 and 10 had about the same amount of fat in the 
muscles as we previously found in fish in the estuary in October 
and November. 
The flesh of number 6 had as small an amount of fat as the 
flesh of the fish previously examined by us from the upper waters 
of the rivers in October and November. 
The small variation in the composition of the ovaries thus 
confirms our previous analyses. 
One fish in the series, No. 25, Plate I., is of special interest. In 
the strong mandibles and large teeth it resembled a male fish, fig. 
3, but no hook was present on the lower jaw. Before opening it 
Mr Morris and 1 both inclined to think that it was a male. 
When the viscera were exposed ovaries were found, but they were 
in a curious condition, which is described in my note-book as 
follows: — “The ovaries had a yellowish opaque appearance, many 
of the eggs having pale opaque patches in them which felt hard. 
The Whole ovaries were flabby and soft.” They were put up in 
formalin 5 per cent, along with a normal ovary, and after hardening 
they showed the folia much shrunken and the whole ovary to be 
thus flattened. On microscopic examination the eggs were found 
shrunken and distorted. The heads of the normal male and 
female fish of this series are shown in Plates II. and III. 
Conclusions. 
1. In late runs of salmon, male fish markedly preponderate. 
Hence in rivers which depend upon these late runs for their 
spawning stock, there is danger in an excessive number of male 
fish reaching the redds. 
