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secure until they are in a condition to migrate to the outer world and assume cattle in India. animals and plants which play the part of parasites to higher organisms, will of the fly, which deposits the eggs on the legs, and from this position they are Some forms of parasites are undoubtedly capable of transmission from the introduced into the digestive organs of the horse without any effort on the part The reader who has followed the description of the various classes of of tape worm, which are found in the intestines of the human subject. One, inflammation and suppuration, and do great damage to the hide, which the Under the name of bots or maggots, the larvae of certain flies which molest the Tpenia mediocunnellata, the cystic form of which infests the muscles of transferred by the animal's own tongue and swallowed. When in the stomach domesticated animals will be referred to more in detail, and with particular Among parasitic plants, the ringworm fungus is readily transmitted to the the chrysalis stage, and lastly, that of the perfect insect. ments which are often difficult to correct. horses, cattle, and sheep are well known. Some of the larvae, as for instance, skin of the human subject, and finds a congenial habitat, producing derange- the warble grub, bury themselves deeply in the tissues of the skin, excite perhaps of even greater consequence, its possible influence on public health. lower animals to man. Capsuled Tritchina spiralis, the cysts of the two forms In the following articles the different parasites which attack the several healing process does not suffice to repair. The larvae of the bot fly are to the lower animals which play the part of host to the parasite^ but, what is have realised the importance of the subject of parasitism, not only in relation the Taenia solium, which has its larval form in the flesh of swine, and the other, the larvae fix themselves into the mucous membrane, in which they remain