The cough is dry and painful at first; afterwards it is accompanied by a discharge or by the swallowing of mucus or muco-purulent products. The respiration sometimes appears accelerated and difficult, but roaring or whistling and marked fever are rare. The slightest pressure over the laryngeal region causes pain and attacks of coughing. The respiration is normal while the animal is at rest, provided that the laryngitis remains localised; frequently, however, it is complicated with bronchitis. The appetite is somewhat diminished, but all these symptoms very rapidly improve. =The diagnosis= is based on the frequency of the cough and the sensitiveness of the throat region. =The prognosis= is favourable in cases of simple laryngitis. =Treatment= consists in the administration of steam inhalations, warm drinks, the application of mustard plasters or blisters around the laryngeal region, and the administration of expectorants to facilitate mucous discharge. PSEUDO-MEMBRANOUS LARYNGITIS. Pseudo-membranous laryngitis, also termed by German authors croupal or diphtheritic laryngitis, because it bears a certain resemblance to human croup, is characterised by the formation of false membranes on the vocal cords, arytenoid cartilages, and subglottal region, etc. In France it has been described under the name of stridulous laryngitis, because its dominant symptom consists in attacks of intense dyspnœa, during which the respiration is accompanied by whistling. Without making any attempt to prejudge the nature of the disease, which resembles the pseudo-diphtheritic forms of laryngitis in man, we prefer the term pseudo-membranous laryngitis. Moreover, this pseudo-membranous laryngitis very frequently accompanies pseudo-membranous sore throat, tracheitis and bronchitis, with formation of false membranes. =Causation.= The causes suggested are similar to those of simple sore throat: they include chills, the ingestion of ice-cold water, or the inhalation of irritant gases, during outbreaks of fire, etc., etc.; but it is quite certain that here, as in many similar cases, a primarily simple laryngitis is complicated by a well-marked infection. =Symptoms.= The general symptoms seen during the early stages consist in loss of appetite, general depression, rigors, and a rise in temperature of 1° to 2° Fahr. Then, after twenty-four or forty-eight hours, the respiration becomes more rapid, difficult, whistling and dyspnœic, with intermittent attacks of suffocation.