PROTOZOA. 175 



Measurements^ -J 53" to TB 5 ffff " long; 7^^" to j^^" wide. 



V. rugula. Found in dejections of cholera patients. V. bacillus and V. 

 lineola are found occasionally in mucus of mouth. V. cyanogenus and V. 

 xanthoqenus at times found in milk. V. - (?) has been found in the blood 

 of patients affected with malignant pustule. (Wood.) 



Paramecium. Body covered with cilia ; no eyespot ; a papilliform tongue- 

 like process present ; aquatic ; stellate contractile vesicle (q. v., p. 55) well 

 seen. (Micrograph. Diet ) 



P. coli, Malmstein. A species found in the discharges of chronic dysen- 

 tery. Very rare. 



Ccrcomonas. Body rounded, or discoidal, tuberculated, with a variable 

 posterior prolongation in the form of a tail, which is longer or shorter, and 

 more or less filiform. (Micrograph. Diet.) 



G. davainei, M. Tandon. Body pyriform ; integument soft ; posterior pro- 

 longation rigid, straight serves to fix the animal at times to surrounding 

 objects. They are true parasites, which live in the intestine of man when cer- 

 tain conditions are present that are requisite for their existence. (Davaine.) 



Measurement. 3'" long. 



Rarely found in cholera dejections. 



C. obliqua (?), Davaine. Resembles above, but smaller, more oval; cau- 

 dal filament arises somewhat from the sides. Rarely found in typhoid 

 fever dejections. 



Trichomonas, Duj. Body ovoid, or globular, becoming drawn out when 

 adherent to the slide, hence sometimes exhibiting a tail-like prolongation . 

 an anterior flagelliform filament present, with a group or row of vibratile 

 cilia. 



T. vaginalis. Body glutinous, nodular, unequal, frequently becoming ag- 

 glutinated to other objects ; movement vacillating. Found in morbid vaginal 

 mucus. (Mic.Dict.) 



Measurement. Length 



PSOROSPBRMI-E. Microscopic, oval, depressed, for the most part spindle- 

 shaped corpuscles, with or without a tail, exhibiting no movements, and con- 

 sisting of a tolerably firm outer coat covered with hair-like processes which 

 exhibit a very delicate and peculiar structure. Such bodies may aggregate 

 in cyst-like masses, the contents of which appear granular to low powers, 

 and exhibit a division into numerous segments, but it is found to consist en- 

 tirely of minute bodies resembling one another, possessing very definite char- 

 acters, being oval flattened, the body slightly curved laterally, with one 

 extremity blunt and the other almost pointed. Sometimes they are embed- 

 ded in a ramified sarcodic mass. (Micrograph. Diet.) 



Measurements. Corpuscles fj sv " long; y5 \jjj" wide. Diameter of cyst 



