lOI 



VI. 



GENUS ENDOLIMAX KUENEN & SWELLENGREBEL, 1917. 



Thkre is only one species belonging to this genus, namely : 



ENDOLIMAX NANA (WENYON & O'CONNOR, 1917) BRUG, 1918. 



? Entamoeba phagocytoides Gauducheau, 1908 (pro parte). 



Chlamydophrys stercorea Elmassian, 1909 {ncc Cienkowski, 1876). 



? Entamoeba nipponica Koidzumi, 1909 {pro parte). 



"Small amoeba" Wenyon, 1912. 



? Vahlkautpfia punctata (Dangeard) Chatton & Lalung-Bonnaire, 



1912 [hro parte). 

 Entamoeba colt Werner, 1912 {pro parte). 

 f Vahlkampfia Whitmore, 1913. 

 Vahlkampjia Craig, 1913. 

 Entamoeba co/? Akashi, 1913 {pro parte). 

 " Free-living amoebae " James, 1914 {pro parte). 

 Tetramitiis mesnili Wenyon, 1915 {pro parte). 

 Amoeba lima.x Wenyon, 1916 {nee Dujardin, 1841). 

 Vahlkampfia Flu, 1916 {pro parte). 



" Non-pathogenic E. tctragena " Shimura, 1916 {pro parte). 

 Entamoeba nana Wenyon & O'Connor, 1917. 

 " Limax" Swellengrebel & Mangkoe Winoto, 1917. 

 Entamoeba nana (Wenyon & O'Connor) Dobell & Jepps, 1917. 

 Endolimax intestinalis Kuenen & Swellengrebel, 1917. 

 Vahlkampfia nana (Wenyon & O'Connor) Brug, 1917. 

 " Limax amoeben" Flu, 1918. 



History and Nomenclature. 



Endolimax nana is so common an inhabitant of the human bowel 

 that it is remarkable that it escaped recognition for so long. This was 

 partly due, I believe, to its confusion with other amoebae — especially the 

 small coprozoic and easily cultivable organisms commonly, but incor- 

 rectly, called "Amoeba limax." 



Gauducheau (1908) described a small amoeba which he named 

 Entamoeba phagocytoides and which he said lived " in the intestine of 

 man" — a statement since reiterated many times. He believed he had 

 bjen able to cultivate this species, but the forms in his cultures were 

 clearly free-living amoebae. It seems possible, therefore, that he culti- 

 vated these from stools containing E. nana, and wrongly assumed the 

 two organisms to be identical. His " E. phagocytoides" was probably, at 

 all events, a mixture of different organisms : for it was found in fresh 

 faeces, and isolated in cultures from stools, from liver abscess pus, and 

 from water. It has been regarded by Gauducheau as having a genetic 



