EMBADOMONAS 



347 



B. Habitat: intestine of Man in Alexandria : — 



Anterior fiagellum long and thin, cytostomic flagellum 



shorter and stouter. 

 Size : 4-9 microns long, but with variable width 2-4 microns 



in narrow forms. Cysts: 4-5-6 microns in length. (3) 



Intestinalis. 



Only Emhadomonas intestinalis Wenyon and O'Connor, 1916, 

 concerns us. 



Embadomonas intestinalis Wenyon and O'Connor, 1916. 



Synonym. — Waskia intestinalis Wenyon and O'Connor, 1916. 



Definition. — Embadomonas found in the intestine of man in 

 Alexandria. Size 4-9 microns in length, but with variable width, 

 some 3-4 microns in narrow forms. Cysts 4*5-6 microns in 

 length. 



Remarks.— This flagellate was found by Wenyon and O'Connor 

 in two cases in the Orwa-el- Waskia section of the 19th General 

 Hospital in Alexandria. 



Morphology. — The flagellate is pear-shaped, with a cytostome 

 at the anterior end, from which (or slightly nearer the cytostome) 

 a thin anterior flagellum takes origin, while a second stouter and 

 shorter arises from the inner part of the anterior v/all of the cyto- 

 stome, from which it projects for a considerable distance. 



Fig. 75. — Emhadomonas intestinalis (Wenyon and O'Connor, 1916). 

 Showing dividing form, flagellate, and cyst. 

 (After Wenyon and O'Connor.) 



The cytoplasm is pale, frequently vacuolated with an anteriorly 

 situate nucleus, which has a nuclear membrane and a central karyo- 

 some. On the surface of the nuclear membrane there are two 

 granules from which the flagella arise. 



Life-History. — Forms with two cytostomes and four flagella have 

 been seen, indicative of division. 



The cysts are pear-shaped bodies of a pearly- white appearance, 

 and quite structureless unless stained, when certain nuclear struc- 

 tures can be made out. 



Pathogenicity. — There is no evidence that it is pathogenic. 



Subfamily Tetramitidin^ Chalmers and Pekkola, 1918. 



Definition. — ^Tetramitid^ with or without a cytostome, with four 

 to six^fiagella, but without an axostyle. 



Classification. — Eight genera belong to the subfamily— viz :— 



