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BESIDES THE PARASITES belonging to nematodese, which have already others which are referred to by authors as of occasional occurrence. These to some cestode worms, both mature and in the scolex stage. Such a state of parasitism must be taken as altogether out of the common be of sufficient importance to require any special notice. course, and it is unfortnnate that there is no record of the animal's condition to observe that the host may harbour more than one species at the same time. during life. Occasionally the respiratory tubes of the horse are invaded by a nematode serious derangement. Of chief importance among them is the worm which invades the breathing tubes and lung tissues, inducing changes of structure The different round worms have been described separately, but it is necessary worm, Strongylus micrurus. This form of parasitism is, however, rare ; calves and lambs infested with strongles, and the parasites will be referred to in their proper place as they exist in the respiratory organs of ruminants. lung strongle, or lung worm, is well known to the stockowner, presenting the reference to the circumstances which favour their invasion, the disturbance An extraordinary case is reported by Krause of a horse which was infested which remain long after the worms have migrated from their habitat. The NEMATODE WORMS IN CATTLE AND SHEEP. Ruminating animals indeed, only occurs when colts are grazing on pastures on which there are have not been observed by veterinarians in this country, aud do not appear to which they occasion, and the means of cure. with 500 Ascaris megalocephala, 190 Oxyuris curvicula, 214 Sclerostoma habitually harbour several varieties of round worms, some of which cause been described as infesting the digestive canal of the horse, there are some armatum, and an immense number of Sclerostoma tetracanthum, in addition