270 PROTOZOOLOGY 



T. elongata Steinberg (T. hiiccalis Goodey et Wellings) (Fig. 

 126, h). About 10-20yLt long; in hunuin mouth. 



T. vaginalis Donne (Fig. 126, c). 10-25)U long; in human vagina. 



T. batrachonim (Perty). Ovoid; 14-18ai by 6-10/x; in frog gut. 



T. auguda Alexeieff. Spindle-form; 18-22yu by 8-14/x; in frog 

 gut. 



T. linearis Kirby (Fig. 126, d). Elongate, spindle-form; 9-24/i 

 by 3-8/jl; in gut of Orthognathotermes wheeleri; Panama. 



T. termitis (Cutler) (Fig. 126, e). 30-88m by 13-57^ (Imms); 

 in gut of Archotermopsis wroughioni ; India. 



Genus Gigantomonas Dogiel (Myxomonas D.). Somewhat 

 similar to Trichomonas, but much larger; 3 short flagella and a 

 very long flagellum; axostyle large; undulating membrane well 

 developed; parasitic. 



G. herculea D. (Fig. 126, /). 60-75ac by 30-35yu; in gut of 

 Hodotermes mossambicus. Myxomonas polymorpha D. (g) reported 

 from the same host appears to be a degenerating specimen. 



Genus Tritrichomonas Kofoid. Similar to Trichomonas in ap- 

 pearance and structure; but 3 anterior flagella; parasitic. 



T. hrevicollis Kirby (Fig. 126, h). Ovoid; undulating membrane 

 curved around end; 10-17yu by 4-8ai; in gut of Kalotermes 

 hrevicollis; Panama. 



T. foetus (Riedmiiller). Pathogenic; in genitalia of cattle; simi- 

 lar to Trichomonas vaginalis; but 3 anterior flagella; body about 

 15m by 5fx; transmission by sexual act, from cow to bull or bull to 

 cow ; in infected cow conception temporarily or permanently sus- 

 pended or death of foetus occurs. 



T.fecalis Cleveland. 5/i by 4^ to 12^ by 6m; average dimensions 

 8.5m by 5.7m; axostyle long, protruding 1/3-1/2 the body length 

 from the posterior end; of 3 flagella, one is longer and less active 

 than the other two; in the faeces of man. Its remarkable adapta- 

 bihty observed by Cleveland was noted elsewhere (p. 28"). 



Genus Tricercomitus Kirby. Small; 3 anterior flagella; a long 

 trailing flagellum, adhering to body; nucleus anterior, without 

 endosome; blepharoplast large, with a parabasal body and an 

 axial filament; parasitic. 



T. termopsidis K. (Fig. 126, i, j). 4-12m by 2-3m; anterior 

 flagella 6-20m long; trailing flagellum 19-65m long; in gut of 

 Zootermopsis angusticollis, Z. nevadensis and Z. laticeps; Cali- 

 fornia and Arizona. 



