THE FEMALE REPRODUCTIVE ORGANS 307 
The diameter of the uterus measures 10 mm. in both body and cornua, 
the latter being distended by clear watery fluid. They are symmetrically 
curved downward. They show no adhesions or obliteration of the os 
uteri to account for fluid retention. The probe is readily passed from 
the vagina to the end of the uterine horns. Vagina is patulous through 
its whole course. Ovary and tube normal. 
An Axis Deer {Cervus axis) showed congenital hydrometra. This 
specimen is from a day old animal, consists of the genitalia in which 
the entire body of the uterus and both uterine cornua have been trans- 
formed into a thin walled translucent cystic cavity containing clear 
fluid. The body of the uterus measures 15 mm. diameter, each cornu 
reaching the diameter of 5 mm. The cornua are curled not unlike ram's 
horns, and are united by a line of adhesions above the body in the mid- 
line. From the ends of the convoluted and cystic uterus and cornua 
spring the normal tubes each with its ovary. 
Cysts. 
Cysts have not been noticed in the lower genital canal, 
but it is true that this region is not exhaustively studied 
in routine autopsies ; however, no large cysts have occur- 
red there. Cysts of the ovary have been limited to the 
so-called cystic disease of this organ ; one parovarian cyst 
has been found. These animals, two ungulates, two car- 
nivores and a rodent, are noted as being young adults, 
only one of which was known to have borne young. In 
only one, the rodent, was there evidence of chronic peri- 
toneal disease. The notes of the parovarian cyst case 
are as follows : 
An Aoudad {Ovis tragelaphus) showed a ruptured parovarian cyst 
with normal right side pregnancy. The fetus, its placenta and mem- 
branes show no change. The right broad ligament and ovary are nega- 
tive, the latter containing a red and gray corpus luteum. The left ovary 
is fibrotic and the left ligament is the seat of a large hematoma, which 
on section is found to contain thin sheets of gray translucent membrane, 
like walls of a cyst. The vessels are all distended. Arteries have stiff 
walls and are empty. Veins have well formed clot. The whole uterus 
and adnexa were slightly turned to the right, but the twist does not 
seem to have been sufficient to cause rupture of a broad ligament vessel. 
Microscopic section of the broad ligament shows a parovarian cyst into 
which there has been hemorrhage. The cyst is separated from the ovary 
proper by a short band of tissue which apparently consists of thinned- 
out ovarian cortex. 
