POLYMASTIGINA 269 



vibrates in life; 4-8 flagella adhering to the body; in termite gut. 



P. vertens L. (Fig. 125, c). 100-1 60ju long; in Reticulitermes 

 flavipes. 



Genus Dinenympha Leidy. Elongate; 4-8 flagella spirally ad- 

 hering to the body; axostyle conspicuous; in termite gut. 



D. gracilis L. In Reticulitermes flavipes and R. lucifugus; 

 Duboscq and Grasse hold that this is an immature stage of 

 Pyrsonympha vertens. 



D. fimbriata Kirby (Fig. 125, d). 52-78m by about 18^; in 

 Reticulitermes hesperus. 



Genus Metadevescovina Light. Spindle to elongate oval; 

 circular in cross-section; body surface smooth, but often with 

 attached bacteria; nucleus anterior; axostyle not extending be- 

 yond the posterior end of body; parabasal body a spiral rod 

 around axostyle; one primary flagellum and 3 long secondary 

 flagella; spirochaetes adhering to body surface (Ivirby) ; in termite 

 gut. 



M. debilis L. (Figs. 23; 125, e). 30-70^ by 15-30/x; in Kalo- 

 termes hubhardi. 



Genus Foaina Janicki (Paradevescovina Kirby). Ellipsoidal; 

 rigid axostyle protrudes a little; flagella similar to those of 

 Devescovina in number and appearance; parabasal body a long 

 curved rod; in termite gut. 



F. nana Kirby (Fig. 125, /). 10/x by 7/^; in Cryptoterynes hermsi. 



Genus Saccinobaculus Cleveland. Elongate to spherical; 4 

 (8 or 12) flagella; axostyle large, paddle-like, deeply stained with 

 Heidenhain, undulates, and serves for locomotion; parasitic. 



S. amhloaxostylus C. (Fig. 125, ^f). 65-1 10/x by 18-26^; in 

 Cryptocercus punctulatus. 



Family 6 Trichomonadidae 



With both axial organellae and an undulating membrane. 



Genus Trichomonas Donne {Ditricho?7ionas Cutler). Pyriform; 

 4 anterior flagella; another flagellum along the margin of undu- 

 lating membrane; costa along the base of the membrane; axostyle 

 projects beyond the posterior end of body; cysts observed in 

 forms inhabiting the animal intestines, but not in those living 

 in man; parasitic in gut of vertebrates and invertebrates. 

 Numerous species. 



T. hominis (Davaine) (Fig. 126, a). 5-18/i long; in human 

 intestine. 



