An Aoudad (_Ovis tragelaphus_) showed a ruptured parovarian cyst with normal right side pregnancy. The fetus, its placenta and membranes show no change. The right broad ligament and ovary are negative, 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 thinnedout ovarian cortex. TUMORS. Tumors of this tract in the mammals have been confined to the uterus proper, none having been found in the vagina, tubes or ovaries; in birds one oviductal growth and two ovarian tumors are recorded. These tumors are reported briefly according to their histological structures, a brief summary being added at the end. A Black Lemur (_Lemur macaco_) showed a local leiomyofibromatous nodule on the lateral aspect of the uterine body near the cornu. A nine banded Armadillo (_Tatu novemcinctus_) gave an interesting specimen which can be described as follows: The uterus is enlarged so that it measures 90 mm. from external os to fundus. Tubes and ovaries apparently normal. There is considerable grumous blood in the vagina and cervix; the former is normal. The cervix is pale and opaque in its lower half; upper half is slightly congested and mucosa decidedly rugous. The uterus itself shows an attenuated muscular wall with a thickened irregular mucosa which is the seat of pseudomembranous tabs of a dull red color, while the mucous membrane itself is irregularly red and yellow; also some grumous blood in the cavity. The size of the uterus is due to a large fibroma attached to the left lateral wall near the cornu. The mucous membrane of this is irregularly disturbed in some places, the tumor being partly bare. Here and there the mucous membrane shows the same degenerating hypertrophic character as seen on uterine wall. The tumor is attached to the wall by a narrow peduncle (Fig. 25). A nylghaie with multiple fibromata has already been described. A Jaguar (_Felis onca_) presented in the middle of the right uterine cornu a cystic resilient tumor 3 × 4 cm., which proved to be a fibroadenoma. A lioness (_Felis leo_) presented a penetrating malignant adenoma of the uterine cervix upon which an active endometritis was implanted. The tumor penetrated the uterine wall, which gave way, an acute fatal peritonitis resulting. Metastases had occurred to the lung.