242 Proceedings of the Royal Physical Society. 
Casn No, 
Huxuey (1), (Fig. 1)—Rana temporaria. Adult, measuring 8 cm. from 
the symphysis mente to the symphysis pubis. Killed April. 
Fore-limbs like those of a very well-developed female but no male 
characters were present. (Huxley was inclined to think that there were very 
slight traces of male characters about the finger-pads when the specimen was 
superficially examined at the time when its abnormalities were first noticed.) 
The m. rectus abdominis and its extension to form the portio abdominalis 
of the m. pectoralis were poorly developed. The hwmeri were of the female 
pattern and the skin of the flanks and back was warty. 
The right gonad was an ovary of usual size. It appeared rather more 
deeply pigmented than the normal. The left gonad had been removed and 
sectioned before the specimen came into my possession. It was an ovo-testis. 
No particular note of the relative positions of ovary- and testis-portions was 
made before the gonad was sectioned, but it is thought that the smaller 
testis-portion lay upon the ventral surface and the external border of the 
gonad. The photograph certainly suggests that this was so, but as in no 
other case has the testis-portion been found in this position but always has 
been along the inner border of the gonad, it is perhaps reasonable to suggest 
that, as the photograph was taken while the specimen was under water, the 
testis-portion floated away from its natural position. 
Vasa efferentia were absent on the right side ; remnants of vessels other 
than blood-vessels were found in connection with the Ailus of the left kidney, 
and two of these were regarded as efferent ducts. No distinct seminal 
vesicles were present upon the urino-genital ducts, but on each of these was 
a small but definite fusiform enlargement in the situation where normally 
the seminal vesicle of the male is to be found. The Miillerian ducts were 
well developed with well-defined, empty, and pigmented uterine segments. 
Ova were present in the upper portions of the ducts, and the glandular 
portions were active. The uterine segments and rudimentary seminal - 
vesicles were bound together, and there were four openings into the 
cloaca (Fig. la). | , 
On section, the right gonad was seen to be composed entirely of ovarian 
tissue. Ova were present in great numbers and in all stages of development. 
But the wall of the ovary was the seat of distinct overgrowth of connective 
tissue and of localised aggregations of polygonal masses of pigment (Fig. 2). 
The left gonad consisted of two distinct portions—a smaller portion 
composed of spermatic tissue, and a much larger portion similar in structure 
to the ovary of the opposite side. The greater part of the spermatic tissue 
