232 PARASITIC AMOEBAE OF MAN. 



This organism has not been cultivated artificially 

 so far as I am aware. 



There is no experimental evidence connecting 

 Entamceba buccalis with disease. It is very doubtful 

 if it has anything to do with caries of the teeth, 

 although it is most frequently encountered in the 

 cavities of carious teeth. However, it may be fre- 

 quently demonstrated in material scraped from the 

 roots of perfectly normal teeth, so that, as far as the 

 evidence goes, we must regard Entamceba buccalis as 

 only a secondary invader of the tissues. 



The amoebae known as Entamceba gingivalis, de- 

 scribed by Gros, in 1849, and Entamceba dentalis, 

 described by Grassi in 1879, are in all probability 

 identical with Entamceba buccalis and do not merit 

 a separate description. 



