A Wild Boar (_Sus scrofa_) had a generalized ulcerating carcinoma of the uterine body. An instance of chorionepithelioma in a Canada porcupine is worthy of separate description. [Illustration: FIG. 25.—PEDUNCULATED FIBROMA UTERI. NINE BANDED ARMADILLO (TATU NOVEMCINCTUS). ] [Illustration: FIG. 26.—FIBROMYOMA OF UTERUS. CORNUA AND TUBES. INDIAN ELEPHANT (ELEPHAS INDICUS). WHOLE MASS AS MOUNTED ON BOARD. IT MEASURED WHEN FRESH ABOUT SIX FEET ACROSS. FIG. 27.—CROSS SECTION OF CORNU OF Fig. 26 AT HIGHER POWER. A PIECE CUT OFF WHERE THE PALE AREA SHOWS ON THE RIGHT CORNU OF THE OTHER FIGURE. ] Canada Porcupine (_Erethizon dorsatus dorsatus_). Acute suppurative catarrhal endometritis, hemorrhage in myometrium, chorionepithelioma. In anterior abdominal wall a short quill was found imbedded. A very small quill was imbedded in the retrocervical muscles. A quill about 2 cm. long lies free in the peritoneal cavity attached by recent plastic adhesions to peritoneum over left pubic ramus. A fourth quill was adherent by recent fibrous lesions to anterior wall of cecum. Peritoneum contains a moderate excess of thin watery fluid. Liver and spleen are negative. Kidney is large, greenish yellow, firm, smooth and glistening. The right uterine cornu is subinvoluted (the animal was delivered of a fetus before arrival at the Garden, which was sixteen days before death). Its walls are thick and distinctly congested, the congestion being of inflammatory type. Microscopic section of uterus shows a regular, not ulcerated serosa. Subjacent fibrous tissue is loose and contains a granular precipitate together with a few red blood cells. Muscular bundles under this are widely separated evidently partly by trauma, but certainly also by edematous interstitial tissue in which fibrillæ are widely separated and between which free red blood cells and plasma cells are seen. Capillaries ramifying through muscular bundles are greatly distended and congested. Numerous large arteries are present in addition. Some of these contain pink granular material within their walls together with diffuse collection of red blood cells. Fibroblasts extend into this necrotic mass from other sections of the walls. Lumen of such arteries is diminished and in places quite obliterated by recent organization tissue. At many places in muscularis are large cells of irregular rounded form and some cytoplasms incline toward the basic tint with one or several large hyperchromatic nuclei. They are especially likely to occur close to a capillary. There is an especially large accumulation of these cells at that point of section farthest from fundus. Here these cells occur in chord-like masses which infiltrate the muscularis both internally and externally. This particular mass lies in the muscularis internal to great arteries and well removed from mucosa. In this mass are giant cells with multiple nuclei