132 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Hermaphrodites . — I am indebted to Mr. J. P. Babcock, of the California Fish 
Commission, and to Mr. Chamberlain for two hermaphrodite salmon. Mr. Cham- 
berlain’s specimen was discovered by the spawning crew at Battle Creek hatchery in 
December, 1900; the other specimen was discovered by Mr. F. A. Coles while cleaning 
fish for the cannery at Black Diamond, and was taken in that vicinity in May, 1901. 
The accompanying illustration represents the Black Diamond specimen. 
The genital organs of the two specimens are essentially the same in structure. 
There is but one pair, as in ordinary individuals, but each organ is developed partly 
as testis and partly as ovary. One organ in the Black Diamond specimen has 
about 3 inches of the anterior portion wel l developed as a testis, and nearly mature. 
Immediately behind this are a few ova that 
are about as large as ova ordinarily are in 
salmon taken in this part of the river. The 
next 4 or 5 inches of the organ consists 
merely of the supporting membrane and 
seminal duct, with half a dozen ova devel- 
oped in one place. Then follows a portion 
about 2 inches long developed as testis. 
The usual seminal duct leads posteriorly. 
The other organ of this specimen also has 
the anterior portion developed as testis, 
while all of the posterior portion is ovarian. 
While the ova are of normal size, the local- 
ity being considered, their number is not 
over one-fourth as great as would be pro- 
duced by a similar portion of a normal 
ovary. 
The Battle Creek specimen is similarly 
developed. Some of the ova are attached, 
while others are free, as if the fish had been 
only partly ripe. All are variable in size, 
but none of normal appearance are as large 
as the average ova taken at Battle Creek. 
Many of the ova evidently were dead at the 
time the fish was taken, and some of these 
were abnormally large. I understand that 
some of the free ova were spermatized with 
milt from the testis portion of the same organs, but none of them lived. It is not 
known whether they were fertilized. 
The genital organs only of these specimens were sent me, and I do not know 
the condition of the cloacal openings. 
Relative number of males and females . — In measuring and weighing salmon at 
Black Diamond, on August 20 and 21, 1900, it was noticed that the females were 
more numerous than the males. To determine whether this was merely a peculiarity 
of the catch of those two days, Mr. F. V. Hubler, the weigher for the Black Diamond 
cannery, was employed to make notes of the relative number of males and females 
during the season, with the following result. 
