194 PROTOZOAN PARASITISM 



The writer did not find it in duodenal drainage of 

 the host and assumes it to be a large intestine in- 

 habitant. 



Nothing further is known at the present in regard 

 to its life history or relation to its host. 



ENTEROMONAS HOMINIS 



Subject to confusion with Tricercomonas intes- 

 tinalis and with Emhadomonas mtestinalis as a small 

 flagellate, named Enteromonas hominis by Da Fon- 

 seca (1915). 



The size, motion, shape and nucleus are quite simi- 

 lar to Tricercomonas intestinalis but there appear to 

 be only two anteriorly directed flagella and the recur- 

 rent one does not appear to be definitely fixed into 

 the body. 



Similar organisms have been seen by several ob- 

 servers in widely separated regions. The writer 

 (1922) observed what was apparently a species in the 

 guinea pig and named it Eiiteromojias caviae. 



EMBADOMONAS INTESTINALIS 



Of better standing and wide distribution, though 

 not as common as the larger flagellates, is another 

 minute organism, Emhadojnonas intestinalis, found 

 by Wenyon and O'Connor (1917) in Egypt. It has 

 been seen and described by Kofoid, Kornhauser and 

 Plate (1919) and by Hogue (1921) in this country, 

 the latter investigator cultivating it in several media. 



