406 PROTOZOOLOGY 



Genus Holomastigotoides Grassi and Foa. Large; pyriform; 

 spiral rows of flagella as in the last genus, but more numerous (12-40 

 rows) ; a mass of dense cytoplasm surrounds ovoid nucleus near the 

 anterior end; in termite gut (Grassi and Foa, 1911). Cytology (Cleve- 

 land, 1949). 



H. hartmanni Koidzumi (Fig. 171, b). 50-140^ long; in Copto- 

 termes formosanus. 



H. tusitala Cleveland (Figs. 62; 63; 64; 172, a, 6). In the hindgut 

 of Prorhinotermes simplex; largest species in this host; elongate pyri- 

 form; five flagellar bands, arise at the anterior end and spiral the 

 body 5| times; dimorphic with respect to chromosome numbers, 

 2 and 3; 130-200 m long. Cleveland's observation on its chromosome 

 cycle has been mentioned elsewhere (p. 158). 



Genus Spirotrichonympha Grassi and Foa (1911). Moderately 

 large; elongate pyriform; flagella deeply embedded in cytoplasm in 

 anterior region, arising from 1 to several spiral bands; mass of dense 

 cytoplasm conical and its base indistinct; nucleus spherical; in ter- 

 mite gut. Development (Duboscq and Grasse, 1928). 



S. leidyi Koidzumi (Fig. 171 ,c). In Coptotermes formosanus; 15-50/z 

 by 8-30ju. 



S. pulchella Brown (Fig. 171, d). 36-42 M by 14-16/x; in Reticu- 

 litermes hageni. 



S. bispira Cleveland. In Kalotermes simplicicornis ; 59-102^ by 

 32-48m; two flagellar bands in 34 spiral turns; resting nucleus with 

 two chromosomes; the cytoplasmic division is unique in that portion 

 of the anterior end shifts its position to the posterior end, where a 

 new flagellar band develops; thus the division is longitudinal (Cleve- 

 land, 1938). 



Genus Spirotrichonymphella Grassi. Small; without spiral ridges; 

 flagella long; saprozoic, not wood-feeding; in termite gut. 



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

 fusion (Sutherland). 



Genus Micro spirotrichonympha 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 (Koidzumi, 1917, 1921). 



M. porteri K. (Fig. 171, e). In Reticulitermes flaviceps ; 20-55^ by 



20-40m. 



M. ovalis (Brown) (Fig. 171,/). 36-48/1 by about 40/z; in Reticu- 

 litermes hesperus (Brown, 1931). 



Genus Spirotrichosoma Sutherland. Pyriform or elongate; below 



