ENTAMCEB^ OF MONKEYS 



225 



in appearance when it inhabits an inflamed tonsil. This is probably the 

 explanation of the curious amoebae which have been described from abscesses 

 in the jaw and mouth. Though Tibaldi has drawn attention to an amoeba 

 which differs from the usual form of E. gingivalis, he has not produced any 

 evidence, apart from its size, to justify its separation as a distinct species. 



Drbohlav (1925c), Howitt (1925) and Dobell (1926) have cultivated 

 E. gingivalu-. Drbohlav failed to infect kittens with the cultured forms 

 (see p. 1297). 



ENTAMCEB^ OF MONKEYS. 



Musgrave and Clegg (1904) stated that they had occasionally observed 

 natural amebic infections of moid^eys in the Philippines, and the writer 



Fig 1U4 — Lntamceb.e from the Intestine of Monkeys {xca. 1,300). 

 (After Mathis, 1915.) 

 ].. Free form of E. pithed. 2-4. Encysted forms of E. pitheci. 



5. Free form of E. nnttalli. 6-8. Encysted form of E. nuttalli. 



(1909) observed cysts which were indistinguishable from those of E. coll 

 in a monkey in Khartoum. Brumpt (1909a) observed similar cysts and 

 free amoebae in Macacus smicus, while Noc (1909) observed cysts 10 to 

 12 microns in diameter in three monkeys in Saigon. Castellani (1908) 

 observed an amoebic abscess of the liver in a Macacus pileatus in Colombo, 

 and proposed the name Enta?noeba nuttalli for the amoeba. Mathis (1913) 

 published an account of an amoeba observed by him in Macacus rhesus 

 and Macacus tcheliensis of Tonkin. He found two distinct types, one re- 

 sembling E. coll of man in that it produced eight-nucleated cysts (Fig. 104, 

 I. 15 



