AMOEBAE OF THE INTESTINAL TRACT. 



This method of reproduction definitely differen- 

 tiated this species of amoeba from Entamaeba coli, in 

 which reproduction occurs in an entirety different 

 manner. If Schaudinn's classification rested entirely 

 upon the marked differences in the reproductive cycle 

 of these two organisms it would be unassailable, but 

 in addition we have marked differences in mor- 

 phology, and the experimental evidence of the effect 

 of the two species upon susceptible animals. 



Conjugation. I have several times observed a 

 process which may be interpreted as conjugation in 

 this species of amoeba. Two organisms may some- 

 times be noted lying in contact, while marked stream- 

 ing of the protoplasm of each is present. It often 

 appears as though there was an interchange of proto- 

 plasm and I am sure that at times I have seen the 

 nucleus of one within the cytoplasm of the other. 

 Beside the streaming motion of the protoplasm the 

 organisms are frequently observed to apparently re- 

 volve about one another, while still attached, this 

 movement alternating with the motion of the proto- 

 plasm. 



Conjugation has also been described in this species 

 by Werner, and he states that one of the organisms 

 appears to differ from the other, being clearer and 

 more homogeneous in structure, but I have not been 

 able to notice any difference in the appearance of the 

 conjugants. 



