_Lesions._ Some cases in mares and cows show old standing lesions, to which the extravasation is secondary: a productive inflammation of the ovarian stroma; varicosity of the ovarian veins; aneurism of the utero-ovarian artery: the presence of emboli or thrombi. In the area of the effusion there is a general turgescence of the vessels, and blood staining of the stroma. Or there are distinct blood clots in the follicles or between them, a few lines or an inch in diameter, buried in the depth of the organ, or standing out in rounded swellings on its surface, and sometimes with a rupture two or three inches in length, and the escape of blood into the peritoneal cavity. This may be sufficient merely to stain the peritoneal fluid, or it may amount to one or two bucketfuls as in cases recorded by Barrow and Palat. In the absence of rupture the effused blood may completely surround the ovary, or may accumulate in one or several of its distended follicles. The effused blood is rarely septic, being usually free from microbes, and it may remain fluid in the peritoneum, or coagulate in the ovary. The enlarged follicle may contain a dark red fluid, in which floats a solid clot, varying in color from dark red to light yellow, according to age. _Symptoms._ These vary greatly with the extent of the lesion, and are always somewhat obscure. With slight interstitial or intrafollicular effusion, there may be only some general disorder, with, it may be, arching and stiffness of the loins, colicy pains, a desire for recumbency, and enlargement and tenderness of the ovary on rectal examination. In more severe cases as noticed by Cordonnier, Saucour and Palat in mares, by Laponsée in the ass, and Renault in the cow, there were shivering, hyperthermia, respiratory and cardiac acceleration, congested mucosæ, dull colicy pains, and anorexia, followed by indications of anæmia, small, weak, rapid pulse, pale mucosæ, coldness of ears and legs (in cows, of muzzle and horns), violent heart action, indisposition or inability to rise, unsteadiness on the limbs when up, and in some cases the escape of blood from the vulva. By rectal examination the enlarged, tender, doughy ovary may be characteristic and the fluctuation of liquid in the peritoneal cavity, which may also be recognized by manipulation of the flank. _Treatment._ This should be directed toward checking the hæmorrhage: Cold water or ice, on loins or flank: injections of cold water: cold water or acids or astringents by the mouth: tannic acid: iron chloride: matico: gelatine: atropine, ergotin. By way of quieting ovarian excitement, viburnum prunifolium or opium may be tried. Sterilized solutions of gelatine may be given subcutem. Mustard or ammonia may be applied to limbs or flank. In case of survival, castration will be indicated. INFLAMMATION OF THE OVARIES. OÖPHORITIS. PERIOÖPHORITIS.