432 BIOLOGY OF THE PROTOZOA 



2. With eight flagella 3 



With six flagella (not parasitic) . . . .Genus Trigonomonas Klebs 



3. Not parasitic 4 



Parasitic 6 



4. With two posterior cytostomal lobes 



Genus Urophagus Klebs 

 Without cytostomal lobes 5 



5. Flagella unequal in length Genus Trepomonas Dujardin 



Flagella approximately equal (see also 7) 



Genus Hexamitus Dujardin 

 (in part) 



6. Cytostome present 7 



Cytostome absent Genus Octomitus Prowazek 



7. Cytostome single; anterior Genus Giardia Kunstler 



(= Lamblia Blanchard) 



Cytostome double (see also 5) Genus Hexamitus Dujardin 



(in part) 



Sub-order 3. Polykaryomastigina. 



With proboscis Family Oxymonadidae 



Without proboscis Family Calonymphidae 



Family 1. Oxymonadidae Kirby. 



1 . Said to be non-flagellated Genus Kirbyella Zeliff 



Flag, anterior 2 



2. Individual with single nucleus, double 



kinetoplast Genus Oxymonas Janicki 



Individual with one to several nuclei 



Genus Proboscidiella 



Kofoid and Swezy 



Family 2. Calonymphidae Grassi. 



1. Nuclei associated with kinetoplasts 2 



Nuclei not associated with kinetoplasts 



Genus Snyderella Kirby 



2. Nuclei and kinetoplasts associated 3 



Nuclei less numerous than kinetoplasts 



Genus Calonympha Foa 

 (em. Grassi) 



3. Nuclei in one anterior circle Genus Coronympha Kirby 



Nuclei otherwise arranged 4 



4. Each kinetoplast associated with one 



nucleus 5 



Each kinetoplast associated with more than 



one nucleus Genus Diplonympha 



5. Nuclei peripheral, spirally arranged . Genus Stephanonympha Janicki 

 Nuclei central, not spirally arranged . Genus Metastephanonympha 



