CHRONIC GLOSSITIS. This form of disease has also been termed “sclerosing glossitis” and “non-actinomycotic wooden tongue,” because it is anatomically characterised by induration of the tissues, and because apparently it resembles true “wooden tongue,” with which it was confused until within the last few years. Imminger in 1888 and Pflug in 1891 described two forms. The first, termed “superficial sclerosing glossitis,” is said to be the more frequent, and most commonly affects young animals suffering from irregularities in dentition. It seems due to a superficial acute glossitis assuming a chronic form. The submucous connective tissue in time undergoes hyperplastic changes, so that the tongue at first becomes swollen and afterwards absolutely rigid. One never finds ulcerations or actinomyces. =Diagnosis.= A close examination will always enable the case to be diagnosed at the first visit, or under any circumstances after a short time. =The prognosis= is very grave, because the animal has the greatest difficulty in grasping and masticating food, or may even be unable to do so. Patients lose flesh very rapidly, and end by dying of hunger. =Treatment= is of little service. The administration of iodine, the only drug which appears indicated, has proved of very questionable value. Economically, it is better to slaughter the animal. * * * * * The second variety is rare, and has been termed “deep-seated sclerosing glossitis.” It is simply a chronic form of ordinary deep-seated glossitis. The layers of connective tissue separating the muscles are represented by very hard, inelastic vertical partitions. As a consequence, the whole tongue becomes indurated and more or less completely immobile. In this condition, again, there is neither ulceration nor actinomyces. =Diagnosis.= The diagnosis necessitates a careful examination. In the living animal it is very difficult to establish a distinction between this and the preceding form, though after death the task becomes much easier. =The prognosis= is grave, complete restoration of the parts being impossible. =The treatment= differs in no respect from that given in the preceding instance. It is of little value. * * * * * Imminger and Pflug have also described a deep-seated nodular sclerosing glossitis, characterised anatomically by the existence in the depth of the tongue of fibrous nodules, varying in size between a small nut and a fowl’s egg. The tongue is only slightly increased in size. This disease may perhaps be due to actinomycosis. CHAPTER II. DISEASES OF THE SALIVARY GLANDS, TONSILS AND PHARYNX. PAROTIDITIS (PAROTITIS).