216 PARASITIC AMOEBAE OF MAN. 



plast. The number of spores corresponds to the 

 number of the divisions of the centrosome, each 

 swarm-spore consisting of a portion of the original 

 nucleus and of the cytoplasmic body. 



After the formation of the swarm-spores is com- 

 plete they develop a flagellum, escape from the cyst, 

 and after swimming about actively for an indefinite 

 time, undergo longitudinal division and finally, after 

 losing their flagella, develop into typical amoeba?, 

 which multiply by simple division and again repeat 

 the process of encystment and spore formation. 



Schaudinn placed this organism in a new genus, 

 Paramceba, and gave it the specific name, eilhardi. 

 Until my description the genus was not known to 

 contain any organism living within man. 



Paramceba homirds passes through both an 

 amoebic and a flagellate stage during its life-cycle, and 

 for this reason and because the organism morpholog- 

 ically resembled Paramceba eilhardi, I had no hesita- 

 tion in placing it in Schaudinn's genus, Paramceba. 

 Doflein is inclined to think that further research will 

 show that the parasite I described should be placed 

 in a new genus, but certainly all the evidence in- 

 dicates that it belongs to the genus Paramceba. The 

 life-cycle is similar in every respect to that of Para- 

 moeba eilhardi and I am therefore convinced that 

 this parasite is properly placed in the genus Para- 



