HOLOTRICHA 



529 



Genus NicoUella Chatton et Perard. Elongate; a narrow groove 

 extends from the anterior end to cytostome, located at middle 

 of body; bilobed posteriorly; contractile vacuole terminal; 

 macronucleus ellipsoid, anterior; a micronucleus; ectoplasm thick 



Fig. 242. a, Pycnothrix monocystoides, X50 (Chatton and Perard); 

 b, NicoUella ctenodadyli, Xl70 (Chatton and Perard); c, Collinella 

 gundi, Xl70 (Chatton and Perard); d, Buxtonella sulcata, X400 

 (Jameson). 



anteriorly; ciliation uniform; in colon of Ctenodactylus gundi. 

 One species. 



N. denodactyli C. et P. (Fig. 242, 6). 70-550m by 40-150^. 



Genus Collinella Chatton et Perard. More elongate than 

 NicoUella; uniform cihation; a groove extends from end to end; 

 cytostome at posterior end of the groove; contractile vacuole 



