3 
Abnormalities of Reproductive System found in Frogs. 249 
The left gonad consisted of an inner normal testis-portion and an outer 
pathological ovarian portion. Ovary- and testis-portions were quite discrete ; 
no ova or pigment were present amid the spermatic tissues; and the ovarian 
tissues contained exceedingly few ova and all these were degenerate. The 
greater part of the ovary-portion was composed of polygonal masses of 
pigment and hyperplastic connective tissue. The cavities of the lobulated 
ovary were obliterated by this pigment, but the divisions of the lobules were 
still distinct (Fig. 18). 
The Miillerian ducts had a central lumen, but neither they nor their 
uterine segments contained any ova, and their glandular portions were 
inactive. No spermatozoa were present within the seminal tubules. There 
were ciliated cells upon the peritoneum, and there was nothing to note 
concerning the pituitary. . 
CasE No. VII. 
Rana temporaria. Adult, measuring 7:2 cm. from the symphysis mentr 
to the symphysis pubis. Killed May. 
External characters—F¥ore-limbs massive. fF inger-pads as those of the 
normal male at other times than during the breeding season—vwell defined 
but unpigmented. Skin of back and flanks not warty (Fig. 19). 
On inspection, right gonad had the appearance of a normal testis save that 
at one point upon its outer border there was a pit with swollen lips and with 
a patch of jet black pigment at the bottom. 
The left gonad was somewhat smaller in size, measuring 12x5x4mm., 
and had the appearance of an 1regularly-shaped testis which bore a nodular 
crest of pigment along its outer border. This crest in its anterior half 
consisted of four rounded raised nodules, but in its posterior half the pigment 
was applied flatly to the surface of the testis. At the junction of the middle 
and posterior thirds of the gonad a deep constriction encircled its body. 
Vasa efferentia as those of the ordinary male. Seminal vesicles well 
defined. Miillerian ducts moderately well developed with well-defined 
uterine segments heavily streaked with pigment (chromatophores). Four 
_openings into the cloaca. MRut-muscle and bones of the fore-limb as those 
of the typical male. 
On section. In the right gonad, all parts not involving pigment had the 
structure of normal functional testis. The pigmented area consisted of 
densely-packed polygonal masses of pigment, which included a circumscribed 
mass of granular lebris. No ova and nothing resembling ova were found 
(Fig. 20). The pigment was everywhere without the semimal tubules, but 
