AMCEBJE OF THE INTESTINAL TRACT. 



maeba, and that this genus must now be regarded as 

 containing a species capable of existing as a parasite 

 in man. 



GEOGRAPHICAL DISTRIBUTION. This species of 

 amoeba was first observed in the feces of a Filipino 

 suffering from an attack of chronic diarrhoea and the 

 same organism was afterwards found in the feces of 

 five other Filipinos. At the time that I published 

 my original description, I had never observed the 

 parasite in Americans or Europeans, although I 

 searched very carefully for it, and many of the 

 Americans examined had resided in the Philippines 

 for considerable periods of time. 



In 1908, while serving at Fort Leavenworth, Kan- 

 sas, I was able to study the same parasite in three 

 American soldiers who had just returned from the 

 Philippine Islands, and all of whom entered the hos- 

 pital because of recurring attacks of diarrhoea. 



In all probability these men became infected in 

 the Philippines, and it may well be that this parasite 

 occurs there much more frequently than has been 

 supposed, having been confused with Entamceba his- 

 tolytica, Entamceba tetragena, Entamceba coli, or 

 Trichomonas hominis. 



So far as the evidence goes, the geographical dis- 

 tribution of this species appears to be confined to the 

 Philippine Islands, but I am of the opinion that care- 



