_Symptoms._ These have been described by M. Pradal, who divides the disease into three stages, evidently dealing with an infectious malady. The _first stage_ is marked by loss of appetite, dullness, slow, listless movements, a tendency to hide under the litter; low, hoarse grunt and cough, the last aggravated by moving the animal; pain in swallowing; red, sunken eye, and constipation. If there is no improvement on the second or third day it merges into the _second stage_. This is characterized by a still hoarser grunt, painful, hard hacking cough, difficult breathing, especially in the sunshine, and a rapidly increasing swelling of the throat, soon extending to both ears and as far down as the breast bone. This engorgement feels soft and pasty though firm, tender lumps may be felt, indicating the approaching formation of abscess. It is so abundant that suffocation may ensue in the course of forty-eight hours. If the progress of the swelling is not arrested it soon passes into the _third_ or _gangrenous stage_. The breathing is more hurried; the mouth open, the protruded tongue of a bluish black color, the cough followed by a continuous rattle, the head unsteady, swallowing impossible, and the swelling extends to the side of the face and beneath the chest. The swollen surface is cold and livid; the bristles easily detached; it is bedewed by a serosity which exudes from it, and portions of the dead skin tend to detach themselves. The mouth and throat participate in the gangrene, the breath, saliva and nasal discharge is fetid, and the epidermis peels off. The snout, ears and skin generally assume a bluish black hue, the prostration is extreme, the creature lying constantly on its side; the pain ceases and in one or two days death ensues, preceded by a state of comparative calmness. On opening the throat after death the mucous membrane is engorged and thickened, bears various hues of black, blue, livid and green, and breaks down into a pulpy mass under slight pressure. The surrounding (pharyngeal) muscles even are implicated in this change. In the earlier stages there is only engorgement with blood of the tonsils and the mucous membrane of the pharynx and larynx; serous infiltration of the surrounding parts, and often the presence of inspissated mucus resembling false membranes or of ulcers on the surface.