In their mature condition however they cause considerable irritation and nasal discharge when present in large numbers. In dogs there is running from the nose the discharge containing an abundance of the ova, restless, fretful habits, sometimes a morbid readiness to bite, frequent shaking of the head and rubbing of the face. The _treatment_ would be to trephine the sinuses and inject lotions impregnated with creosote, carbolic acid or naphtha. From the danger to man of becoming infested it is important to ascertain the true nature of any nasal discharge of the dog especially in countries like Germany and Egypt in which this parasite is common. _Prevention._ Deny raw offal of herbivora to dogs. AFFECTIONS OF THE THROAT. _Sore throat_, _Angina_, _Cynanche_—is a generic name applied to a series of inflammatory affections of the various structures about the throat. If the _larynx_ is specially inflamed the disease is known as _laryngitis_, if the _pharynx_, as pharyngitis, if there are exudations forming false membranes it is _croupous_ or _diphtheritic_, or if associated with some general febrile affection, it takes its name accordingly, _influenza_, _strangles_, _distemper_, or _scarlatina_, as the case may be. LARYNGITIS IN THE HORSE. ANGINA LARYNGITIS, CYNANCHE LARYNGEA, ETC. Causes, mechanical, cold, irritants, extension, diet, close stables, infectious disease. Symptoms of acute form, head extended, throat swollen, tender larynx, cough, in early stage, after exudation, wheezing in inspiration, dysphagia, fever, œdena glottidis, spasms, dyspnœa, successive discharges. Lesions, tumefaction, softening, friability, redness (ramified or not), erosions of mucosa, œdema. Course, duration, sequelæ, cough, roaring. Subacute form, chronic form, in old debilitated animals, in those reined too tightly, in those which perspire with difficulty or bear heavy coats. Symptoms, local, in breathing, cough, effect of cold air, or water or of dust. Sequelæ, ossified cartilages, roaring, emphysema, bronchiectasis. Treatment, hygienic, soothing, sheepskin, compress, poultice, mustard, sulphur dioxide, laxative, neutral salts, expectorant, sedative, derivative, tracheotomy, with trochar and cannula, with scalpel, tracheotomy tubes. Insufflation, injection. In chronic laryngitis, electuaries, mustard, derivatives, astringents, caustics, tonic inhalations. _Causes._ These are the ordinary causes of chest diseases. As special causes may be noted severe compression of the larynx as in roughly and repeatedly _coughing_ an animal; the sudden contact of piercing cold air, of irritant gases, powders or liquids with the membrane, and the rapid, forcible and continuous current of condensed air through the glottis during severe exertion.