. A manual of clinical diagnosis by means of microscopical and chemical methods, for students, hospital physicians, and practitioners . uris (Grassi). The parasite (Fig. 49) is pear-shaped,and measures from to mm. in length by to ..>mm. in breadth. In its anterior portion a more or less well-marked 1 Marchand, loc cit. Zunker, loc. cit., p. 236. Mosler u. Peiper, Nothnagels u. Therap., 1894, vol. vi. 238 THE FECES. depression can be made out, which constitutes the peristome ormouth-opening of the organism. It is provided with eight flagella,grouped in pairs. The
. A manual of clinical diagnosis by means of microscopical and chemical methods, for students, hospital physicians, and practitioners . uris (Grassi). The parasite (Fig. 49) is pear-shaped,and measures from to mm. in length by to ..>mm. in breadth. In its anterior portion a more or less well-marked 1 Marchand, loc cit. Zunker, loc. cit., p. 236. Mosler u. Peiper, Nothnagels u. Therap., 1894, vol. vi. 238 THE FECES. depression can be made out, which constitutes the peristome ormouth-opening of the organism. It is provided with eight flagella,grouped in pairs. The first pair originates on the sides of the peri-stome and is directed backward. The second and third pair aresituated somewhat posteriorly and are likewise directed backward,while the fourth pair issues from the tapering tail-end of the fresh specimens the eighth flagella can usually not be made out,as the third and fourth pair are frequently agglutinated. The bestresults are obtained when the organism has been killed with mercuricchloride solution. The individual flagella vary from to Fig. Megastoma , b, b, c, c, c, c, various forms of Cercomonas intestinalis, after Lambl; d, d, encystedforms of Megastoma entericum, after Grassi and Schewlakoff; e, Megastoma entericum,adult form. mm. in length. In the anterior portion of the peristome two round,hyaline bodies can be recognized, which represent nuclei. Vacuolesare absent, and nutrition occurs through osmosis, the parasite adher-ing to epithelial cells by its peristome. When treated with fixingsolutions the chitinous envelope can be readily recognized. In theencysted form the organism is oval and measures from to in diameter. Grassi observed the organism in mice, rats, cats, dogs, rabbits, 1 Grassi u. Schewiakoff, Zeit. f. wiss. Zoologie, 1888, vol. xlvi. p. 143. PATHOLOGY OF THE FECES. 239 Balantidium coli, Stein : syn.} Paramoecium eoli (Malmsten). Theorganism is oval
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