V FLAGELLATA CLASSIFICATION I I I 



A. Flagelhim 1. 



(a) No anterior process : often parasitic . . Oikomonadidae 



Oikomonas K. (Figs. 37, 2, 8) ; Tnjpanosoma Gruby (Fig. 39, a-f) ; 

 Treponema Vuill. (Fig. 39, g-i). 



(6) Anterior process unilateral or probosoidiform : cell often thecate 



BiCOECIDAE 



Bicoeca Clark ; PoteYiodendron St. 

 If) Anterior process a funnel, surrounding tlie base of the flagelluni : 

 cells often tliecate. 



(i.) Funnel free .... Craspedomonadidae 



Godosiya Clark ; Monosiga CI. ; I'olyoeca Kent ; Proterospongia 

 Kent ; Salpingoeca CI. 

 (ii.) Funnel not emerging from the general gelatinous investment 



Phalansteridae 



B. Flagella 2, unequal or dissimilar in function, the one sometimes short and 

 ■thick. 



(o) Both flagella directed forwards . . . MonaDidae 



Monas St. ; Aiitliophysa Bory (Fig. 37, 13). 

 (6) One flagellum, usually the longer, turned backwards. Bodonidae 



Bodo St. (Fig 38). 

 C Flagella 2, equal and similar . . Ai]PHiMOifADiDAE 



Amphimonas Duj. ; Diplomita K. (Fig. 37, 10) ; Rhipidodendron St. 

 (Fig. 37, 14). 



D. Flagella 3 . . . . . . Trimastigidae 



Bcdlingeria K. (Fig. 37, 6) ; Gostia Leclereq. 



E. Flagella 4 or more : mostly parasitic in Metazoa. Polymastigidae 

 Trichomonas Donne ; Tetramitus Perty (Fig. 37, 7) ; Hexamitus Duj. ; 

 Lamblia Blanchard. 



F. Flagella numerous, sometimes constituting a complete ciliiform invest- 

 ment, and occasionally accompanied by an imdulating membrane : 

 parasitic in. Metazoa. 



(a) Flagella long : nucleus single : parasitic in insects Triohonymphidae 

 Dinenympha Leidy ; Joenia Grassi ; Pyrsonympha Leidy ; Tricho- 

 nympha Leidy ; Lophomonas St. ; Maupasia Schew. 



(6) Flagella short, ciliiform, uniformly distributed : nuclei very 

 numerous, all similar : parasitic in Amphibia . Opahkidae 



Opalina Purkinje and Valentin (Fig. 41). 



Volvooaceae 



A. Cells usually isolated, separating after fission or brood -formation. 

 Usually green (sometimes red), more rarely colourless saprophytes 



Chlamydomonadidab 

 Ghlamydomonas Ehrb. ; Phacotus Perty ; Polytoma Ehrb. ; Sphaerella 

 Sommerf. (I'ig. 43) ; Zoochlorella. 



B. Cells multiplying in the active state by radial divisions in the same 



plane and usually incurving to form a spherical colony, united in a 

 gelatinous investment, sometimes traversed by plasmic threads 



Volvocidae 

 Gonium O.F.M. ; Eudorina Ehrb.; Pandorina Bory (Fig. 45) ; Stephano- 

 sphaera Cohn ; Volvox L. (Fig. 44). 



