AMOEBINA 457 



considered that E. gingivalis may be disseminated both by direct 

 contact and by intermediate contaminated articles. Nuclear division 

 (Stabler, 1940; Noble, 1947). 



E. gedoelsli Hsiung (E. intestinalis (Gedoelst)). In the colon and 

 caecum of horse; 6-13ju by 6-1 1/x; endosome eccentric; bacteria- 

 feeder. 



E. equi Fantham. 40-50m by 23-29^; nucleus oval; cysts tetra- 

 nucleate, 15-24/z in diameter; seen in the faeces of horse; Fantham 

 reports that the endoplasm contained erythrocytes. 



E. bovis Liebetanz. 5-20/x in diameter; uninucleate cysts, 4-15/z in 

 diameter; in the stomach of cattle and gnu, Cunnochaetes taurinus 

 (Mackinnon and Dibb, 1938). Morphology (Noble, 1950). 



E. ovis Swellengrebel. Cyst uninucleate; in the intestine of sheep. 



E. caprae Fantham. In goat intestine. 



E. polecki (Prowazek). In the colon of pigs; 10-12/z in diameter; 

 cyst uninucleate, 5-1 1/z in diameter. 



E. debliecki Nieschulz (Fig. 194, a). 5-lO^t in diameter; cysts uni- 

 nucleate; in the intestine of pigs and goats. Two races (Hoare, 1940) ; 

 morphology (Nieschulz, 1924) ; Entamoebae of domestic animals (No- 

 ble and Noble, 1952). 



E. venaticum Darling. In the colon of dog; similar to E. histolytica; 

 since the dog is experimentally infected with the latter, this amoeba 

 discovered from spontaneous amoebic dysentery cases of dogs, in 

 one of which were noted abscesses of liver, is probably E. histolytica. 



E. cuniculi Brug. Similar to E. coli in both trophic and encysted 

 stages; in the intestine of rabbits. 



E. cobayae Walker (E. caviae Chatton). Similar to E. coli; in the 

 intestine of guinea-pigs (Nie, 1950). 



E. muris (Grassi) (Fig. 194, b, c). In the caecum of rats and mice; 

 trophozoite 8-30 /z; cytoplasm with rod-shaped or fusiform bacteria 

 and flagellates coinhabiting the host's organ; nucleus 3-9/* in diame- 

 ter and resembles closely that of E. coli; cysts 9-20/x in diameter, 

 with eight nuclei when mature. Nuclear division (Wenrich, 1940); 

 food habits (Wenrich, 1941). 



E. citelli Becker (Fig. 194, d, e). In the caecum and colon of the 

 striped ground squirrel, CiteUus tridecemlineatus ; rounded tropho- 

 zoites 10-25m in diameter; nucleus 4-6/* in diameter, with a compara- 

 tively large endosome which varies in position from central to 

 perpheral; cysts with eight nuclei, about 15m in diameter. 



E. gallinarum Tyzzer. In the caeca of chicken, turkeys and pos- 

 sibly other fowls; trophozoites 9-25 (16-18)//; cysts octonucleate, 

 15^ bv 12ju. 



