STRUCTURE 105 



Parasites have already been described by others 

 in various protozoa, particularly in those which 

 by degenerating have become susceptible to in- 

 fection. The one we have isolated appears very 

 similar to that described by Nagler as a facultative 

 parasitic micrococcus of amoeba. Dr. E. H. Ross 

 has examined the parasite by the jelly method 

 of staining, and informs us that it is probably a 

 large micrococcus, containing one or more large 

 masses of chromatin surrounded by a layer of 

 clear cytoplasm, in which a variable number of 

 scarlet-staining granules can readily be dis- 

 tinguished. He was also able to make out 

 details of structure closely resembling those de- 

 scribed by Mencl in Micrococcus ochraceus. An 

 analysis showing the cultural and other characters 

 of the parasite is appended. 



