1920] Kof old: Nomenclature of Human Intestinal Flagellates 149 



may have been dealing with the coprophilie infections of stale stools; 

 if the latter, with active flagellates of para.sitic origin belonging to 

 Craigia rather than Cercomonas. 



3. Judging from the occurrence of Cercomonas in culture from 

 human stools, as shown by Wenyon (1910) and Hartmann and Chagas 

 (1910) j it is probable that this genus contains coprophilie species which 



Pigs 1-4. Cercomonas longicauda Dujardin. After Wenyon, 1910, figs. 9, 10, 

 19. Slagnifieation about 2000. Fig. 1. Lateral view of free stage showing 

 flattened side along which the posteriorly directed intracytoplasmic flagellum 

 runs. Figs. 2 and 3. Encysted stages, cyst wall not shown. 



Figs. 5-7. Cercomonas parva Hartmann and Chagas (1910, pi. 4, figs. 4, 2, 

 and 12). X 2500. From culture of human faeces. Fig. 5. Free stage, showing 

 axostyle with terminal posterior flagellum. Fig. 6. Free stage from life. Fig. 7. 

 Encysted stage with cyst wall. 



