MORPHOLOGY AND TAXONOMY OF THE MASTIGOPHORA 427 



Family 9. Bodonidae Biitschli. 



12. Body with keels or ridges 13 



Bodv smooth — no ridges 15 



13. With 1 to 4 ridges 14 



With 8 ridges Genus Tropidosajphus Stein 



14. Body flat Genus Sphenomonas Stein 



Body ellipsoid Genus Notosolenus Stokes 



15. Cytostome at end of internal protrusible 



tube Genus Entosiphon Stein 



Without internal or protrusible tube 16 



16. With ventral furrow to posterior end. Genus Anisonema Dujardin 

 With pocket-like, deep cytostome 17 



17. Mouth small; cell with rod or "Stab"- 



organ Genus Dinema Perty 



Mouth large; no "Stab "-organ. . . .Genus Marsupiogaster 



Schewiakoff 



IS. Without transverse bars Genus Cryptobia Leidy 



With transverse bars Genus Trypanophis Keysselitz 



Family 10. Cercomonadidae Kent. 



1 . Without axoneme 2 



With axoneme Genus Cercomastix Lemmermann 



2. Primary flagellum single 3 



Primary flagella two Genus Trimitus Alexeieff 



3. Primary flagella very short, inconspicuous 



Genus Helkesimastix 



W< todcock and Lapage 

 Primary flagella conspicuous Genus Cercomonas Dujardin 



Family 11. Trimastigidae Senn. 



1. Secondary flagella arise from anterior end 



Genus Macromastix Stokes 

 Secondary flagella arise below anterior end 



Genus Dallingeria Kent 



Class II. METAMASTIGOTA. 



Order 1. HYPERMASTIGIDA Grassi. 



1 . Organisms with segmented structure 



Family 8. Cyclo nymphidae Dof. 

 Organisms without segmented structure . . 2 



2. Flagella in bundles or tufts at anterior 



end 3 



Flagella not limited to anterior bundles ... 7 



3. One bundle of flagella 6 



Flagella in more than one anterior bundle. . 4 



4. With two anterior bundles Family 2. Hoplonymphidae Light 



With more than two bundles 5 



5. With four bundles Family 5. Staurojoeniidae Grassi 



With more than four bundles. . .Family 3. Kofoidiidae Light 



6. Organisms without axostyle. . . .Family 1. Lophomonadidae Grassi 

 Organisms with axostyle Family 4. Joeniidae Grassi 



7. All flagella insertion lines spirally wound 



Family 6. Holomastigotidae 

 Grassi 

 Flagella insertion lines not spirally wound 



Family 7. Trichonymphidae Kent 



