aT ss ee ee 
Abnormalities of Reproductive System found in Frogs. 245 
surfaces were divided by a deep transverse groove into more or less equal 
anterior and posterior halves. Closely applied to the outer border and 
anterior pole of this testis-portion was a mass of ovarian tissue, abnormal in 
that it was firmer to the touch, more solid-looking, and more densely and 
uniformly pigmented, than is the normal ovary. 
The left gonad was a testis of unusual shape, measuring 17 x 5 x 6 mm. ; 
its surfaces were uneven, and its anterior pole was irregularly flattened 
dorso-ventrally. 
Vasa efferentia of the ordinary male arrangement were present in 
connection with the inner borders of both gonads. Seminal vesicles were 
present; the left one being well developed and the right one spindle-shaped, 
and non-pigmented. Such a difference in the degree of development of the 
vesicles of the two sides is not unusual in the male (Fig. 7a). The right 
Miillerian duct was well developed and much convoluted, but its uterine 
segment was small and non-pigmented. The left duct was rudimentary 
and straight but possessed a well-defined, though very small, non-pigmented 
uterine segment. No ova could be seen within these ducts. Uterine 
segments and seminal vesicles were intimately bound together in the more 
posterior portions, and there were four openings into the cloaca. } 
On section, the right gonad proved to be an ovo-testis. The testis-portion, 
discrete from the ovarian, consisted everywhere of normal spermatic tissue. 
The ovarian portion was applied to the outer border and to the anterior 
pole of the testis-portion and was pathological, showing degeneration of the 
ova, hyperplasia of the connective tissue, and a great relative increase in 
the amount of the pigment normally present in ovarian tissue (Fig. 8). 
Along the line of junction of testis and ovarian portions the actively growing 
spermatic tissues were seen to be enveloping ova and ovarian pigment (Fig. 8a). 
This undoubtedly illustrates the method by which ova and pigment become 
included amid spermatic tissues in such cases. 
The left gonad (Fig. 9) had the structure of ordinary spermatic tissue 
save that throughout the gland, ova, some normal and others distinctly 
degenerate in appearance, were found within and between the seminal 
tubules. The presence of such an ovum within a seminal tubule was 
associated with obvious deformity and degeneration of the compressed 
spermatozoa. 
The left Miillerian duct possessed a central lumen throughout its length 
and had a patent ostwwm abdominale. No ova were present in either duct, 
and no spermatozoa were found in the seminal vesicles. There were ciliated 
cells upon the peritoneum, and the pituitary, though distinctly smaller than 
usual, had the normal structure. | 
