AMCEB.E OF THE INTESTINAL TRACT. 



nose this species of amoeba with but little difficulty^ 

 When one observes in feces the peculiar rotating 

 organisms which I have described, one may be sure 

 that Paramceba hominis is present. 



In the flagellate stage of development the only 

 organism occurring in the feces which might be con- 

 fused with Paramceba hominis is Trichomonas hom- 

 inis, because of certain peculiarities in the develop- 

 ment of the latter. Trichomonas hominis is fre- 

 quently observed in the resting stage, when it is 

 spherical in shape, and appears to possess a limited 

 degree of amoeboid motion. However, it is much 

 smaller than Paramceba hominis and never shows the 

 active progressive motion observed in the latter. The 

 flagellate stage of Paramceba hominis is distinguished 

 from active trichomonads by the absence of an un- 

 dulating membrane, the presence of but one flagellum, 

 and the more spherical form of the organism. 



The simultaneous occurrence in the feces of the 

 amoebic stage, the encysted stage, and the flagellate 

 stage of Paramceba hominis, is characteristic of this 

 organism, and no difficulty should be experienced 

 by one who is well acquainted with intestinal protozoa,, 

 in differentiating this species from other parasites 

 which infest the intestine of man. 



