356 MASTIGOPHORA AND PROTOMONADINA 



long loose folds, as well as a thinnish axostyle and a nucleus rich in 

 chromatin and bounded by a very definite membrane. He named 

 this organism Trichomonas prowazeki, but as it possesses four and 

 not three anterior unequal flagella, Parisi created a new genus with 

 it as the type. 



Tetratrichomonas vaginalis Castellani and Chalmers, 191 9. 

 Kiinstler described Trichomonas vaginalis with four flagella, and 

 we have seen forms in the human vagina with four flagella. 



Tetratrichomonas intestinalis Chalmers and Pekkola, 191 9. 

 Found in human faeces in Egypt by Wenyon and O'Connor, and 

 later by Chalmers and Pekkola in the Sudan. 



Genus Pentatriehomonas Chatter jee, 1915. 



Definition. — Trichomonadinse with a cytostome, an undulating 

 membrane, and five anterior flagella. 



Type Species. — Pentatriehomonas ardindelteili Derrieu and Ray- 

 naud, 1914, found in the intestine of man in Africa and India. 



Remarks.' — Chatterjee instituted this genus for a flagellate which 

 he found in the intestine of man in Bengal, and which at the time 

 he called P. bengalensis. This organism agrees in most particulars 

 except measurement with that mentioned above under the heading 

 Hexamastix Derrieu and Raynaud, and therefore Chatter jee's 

 generic name takes the place of this Hexamastix, but Derrieu and 

 Raynaud's specific name has priority, and the parasite becomes 

 known d.s Pentatriehomonas ardindelteili Derrieu and Raynaud, 1914, 

 until some definite difference between the two is established. 



More recently Chatterjee states that he has found this organism 

 to be present in thirty- two cases of chronic dysentery. 



Pentatriehomonas ardindelteili (Derrieu and Raynaud, 1914). 

 This is the only species and hence also the type, and has the char- 

 acters of the genus. It is found in man. 



REFERENCES. 



There is no one paper or book which deals at all adequately with the Mas--^ 

 tigophora; the best we can recommend is Saville Kent's 'Infusoria,' Doflein's 

 latest edition, and Fantham, Stephens, and Theobald's (1916) ' Animal Para- 

 sites of Man.' But none of these are any use without Dujardin, Davaine, 

 and Stein, combined with Biitschli, Kiinstler, Klebs, Wenyon, Dobell, Kofoid, 

 and Swezy, etc. Chalmers and Pekkola have attempted statements with 

 regard to the Tetramitidae, with a view to clearing up the existing confusion. 



For references, see Field, H. H. (191 2), 'Bibliographia Protozoologica,' Aychiv 

 fi'ir Protistenkunde, xxvi., p, 444. Jena. 



DoFLEiN AND KoEHLER (1912). Uebcrblick iiber Stamm. der Protozoen. 

 Kolle and Wassermann's Handbuch der Pathogenen Mikroorganismen. 

 Jena. 



MiNCHiN (191 2). An Introducton to the Study of the Protozoa. London. 

 pROWAZEK (1911-12). Handbuch der Pathogenen Protozoen. Leipzig. 



