OF THE ALIMENTARY TRACT 



171 



to Trichoinonas homims, it being nonplastic, and 

 unflexible. Its motion is always forward, the 

 broader end being the head, and it distinctly rotates 

 as it swims. This rotation is apparently due to the 

 fact that the body is twisted or grooved in a spiral 

 from before backward. 



Arising from the blepharoplast, a granule or gran- 



FiG. 26. — ChilomasLix mesnili. 



Drawings of trophozoite and cyst from specimens stained by 

 iron-haematoxvlon. x 2000. 



ules just beneath the surface in the anterior extrem- 

 ity, are three flagella, which, in rythmic lashing, pro- 

 pell the body forward and brush food particles into 

 the cyto^tome. These can be counted in sluggish or 

 motionless specimens, by good lighting in ordinary 



