278 PROTOZOOLOGY 



the nucleus; reproduction by longitudinal division; inhabitants 

 of termito gut. 



Genus Holomastigotes Grassi. Body small; spindle-shajjed; few 

 spiral rows reach from anterior to i)osterior end; nucleus anterior, 

 surrounded by a mass of dense cytoplasm; nutrition by absorp- 

 tion of fluid material; in termite gut. 



H. elongatum G. (Fig. 129, a). In gut of Reticulitermes lucifugus, 

 R. speratus, R. flaviceps, and Macrohodotermes mossambicus; up 

 to 70ai by 24m (Grassi). 



Genus Holomastigotoides Grassi et Foa. Large; spindle-shaped; 

 spiral rows of flagella as in the last genus, but more numerous 

 (12-40 rows); a mass of dense cytoplasm surrounds ovoid nucleus; 

 in termite gut. 



H. hartmanni Koidzumi (Fig. 129, 6). 50-140yu long; in Copto- 

 termes formosanus. 



Genus Spirotrichonympha Grassi. Moderately large; elongate 

 pyriform; flagella deeply embedded in cytoplasm in anterior 

 region, arising from 1-several spiral bands; mass of dense cyto- 

 plasm conical and its base indistinct; nucleus spherical ; in termite 

 gut. 



S. leidyi Koidzumi (Fig. 129, c). In Coptotennes formosanus; 

 15-50m by 8-30^. 



,S. pulchella Brown (Fig. 129, d). 36 42/x by 14-16^; in Reticu- 

 litermes hageni. 



S. polygyira Cupp. (Fig. 58). In Kalotermes simplicicornis ; 

 63-1 12/x by 25-60/x; four flagellar bands. 



Genus Spirotrichonymphella Grassi. Small; without spiral 

 ridges; flagella longer; not wood-feeding; in termite gut. 



S. pudihunda G. In Porotermes adamsoni; Australia. Multiple 

 fusion (Sutherland). 



Genus Microspirotrichonympha Koidzumi {Spironympha Koid- 

 zumi). Small, surface not ridged; spiral rows of flagella only on 

 anterior half; a tubular structure between nucleus and anterior 

 extremity; a mass of dense cytoplasm surrounds nucleus; with 

 or without axial rod; in termite gut. 



M. porteri K. (Fig. 129, e). In Leucotermes flaviceps; 20-55^ 

 by 20-40m. 



M. ovalis (Brown) (Fig. 129,/). 36-48^ by about 40^; in Reticu- 

 litermes hesperus. 



Genus Spire tricho soma Sutherland. Pyriform or elongate; be- 



