246 Proceedings of the Royal Physical Society. 
Case No. IV. 
Rana temporaria. Adult, measuring 7°8 cm. from symphysis menti to 
symphysis pubis. Killed June. 
External characters,—Finger-pads as those of the typical male at other 
times than during the breeding-season. Fore-limbs massive. Skin of back- 
and flanks not warty (Fig. 10). 
On inspection, the right gonad had the appearance of a testis, irregularly 
shaped, and bearing along its outer border a broad raised crest of jet-black 
pigment. The gonad measured 11x8x6 mm., and was scarred with 
deep grooves. The pigment at some points was flatly applied to the 
surface of the gonad, whilst at others it was piled up into rounded nodules 
resembling abnormal ovarian tissue. The left gonad, 13x8x7 mm., and 
very similar in appearance to its fellow of the opposite side, was divided 
by deep constrictions upon its surfaces into three lobes, of which the anterior 
and middle had the appearance of testis with abnormal pigment along the 
outer border, while the posterior was entirely pigmented and looked like 
abnormal ovary (Fig. 11). 
eS =<. 
Vasa efferentia were present on either side. Pigmented seminal vesicles 
of average size were to be seen. The Miillerian ducts were well developed 
with empty but pigmented uterine segments. Four openings into the 
cloaca. The m. rectus abdoninis and hwmeri were of the male type. On 
section, the right gonad consisted of ordinary spermatic tissue, in all 
parts save these including the pigmented areas, which consisted of densely 
packed polygonal masses of pigment, hyperplastic connective tissue, and 
many ova, all of which showed signs of much degeneration (Fig. 12). This 
ovarlan tissue was everywhere discrete from the testis portion of the 
gonad, but the line of junction between the two was very irregular so that 
the pigment of the ovary-portion seemed to invade the spermatic tissues 
along the lines of the intertubular connective tissue. 
The left gonad consisted of three lobes. The anterior and middle were 
similar in structure to the right gonad, but the posterior consisted entirely 
of ovarian tissues. In this there were but few ova, and all of them 
degenerate amid the dense masses of pigment. The substance of this lobe 
was continuous with the pigmented crest upon the outer border of the other 
two lobes of the gonad. 
There was ciliated epithelium upon the peritoneum of the suspensory 
ligament of the gonads. The pituitary, though much smaller than usual, — 
was normal in structure and the suprarenals were unremarkable. 
