FAMILY TETRAMITIDM 



345 



Cereomonas parva Hartmann and Chagas, 1910. 

 This is probably the same as C. longicauda. 



Family Tetramitid^ Kent, 1880, emendavit Chalmers and Pekkola, 



1917. 



Definition. — -Monozoa with three to six anterior flagella (with the 

 exception of Embadomonas, which has only two visible flagella, 

 one anterior and one posterior), with or without a rhizoplast, with 

 or without a posterior or trailing flagellum, which may, or may not, 

 form an undulating membrane, with or without an axostyle or a 

 cytostome. Habitat, free living and parasitic. 



Type Genus,— Tetramitus Perty, 1852, 



Classifleation.— The family may be divided into three subfamilies 

 as follows : — ■ 



A. Without an axostyle : — • . : - 



(a) With three flagella— Subfamily L, EmbadomonadincB 



Chalmers and Pekkola, 1918. 



(b) With four to six flagella — -Subfamily IL, TetramitidincB 



Chalmers and Pekkola, 1917, emendavit 1918 



B. With an axostyle — -Subfamily IIL, TrichomonadincB Chalmers 



and Pekkola, 1917. 



Subfamily Embadomonadin^ Chalmers and Pekkola, 1918. 



Definition. — ^Tetramitidae with or without a cytostome, but with- 

 out an axostyle and with three flagella only. (Only two are visible 

 in Embadomonas.) 



Classification. — The known genera of the subfamily Embadomo- 

 nadinse may be recognized as follows : " 



A. Without cytostome : — • 



L With three anterior flagella— (i) Enter omonas da 

 Fonseca, 1915. 

 II. With one anterior and two posterior flagella — 

 (2) Dallengeria Saville Kent, 1880. 

 III. With two anterior and one posterior flagella — (3) Di- 

 cereomonas Chalmers and Pekkola, 1919. 



B. Cytostome present or probably present {as a groove) : — 



L With one anterior, one cytostomic and then free, and 

 one free trailing flagellum— (4) Trimastix Saville 

 Kent, 1880. 



H. With one anterior and one posterior flagellum which 

 is generally cytostomic, and with a large cytostome 

 with siderophilous, often folded, border— (5) Emba- 

 domonas Mackinnon, 1911. 



The genera in which we are interested are Enteromonas, Di- 

 cereomonas and Embadomonas, 



