734 



PROTOZOOLOGY 



Genus Pycnothrix Schubotz. Large, elongate; with broadly 

 rounded anterior and narrowed posterior end; somewhat flattened; 

 short thick cilia throughout; ectoplasm thick; macro nucleus spheri- 

 cal, in anterior 1/6; micronucleus(?); 2 longitudinal grooves, one be- 

 ginning on each side near anterior end, united at the notched pos- 

 terior end; a series of apertures in grooves considered as cytostomes; 

 at posterior 1/3, an aperture gives rise to branching canals running 

 through endoplasm, and is considered as excretory in function. One 

 species. 



P. monocystoides S. (Fig. 313, a). 300ju-2 mm. long; in the colon of 

 Procavia capensis and P. brucei. 



Genus Nicollella Chatton and Perard. Elongate; a narrow groove 

 extends from the anterior end to cytostome, located at the middle of 



Fig. 313. a, Pycnothrix monocystoides, X50; b, Nicollella ctenodactyli, 

 X170; c, Collinella gundi, X170 (Chatton and P6rard); d, Buxtonella sul- 

 cata, X395 (Jameson); e, Taliaferria clarki, X500 (Hegner and Rees). 



