110 



BIOLOGY OF THE PROTOZOA 



61, E). In still other cases the blepharoplast also gives rise to one 

 endoplasmic fibril or rhizoplast, which extends deeply into the cell 

 as in Rhizomastix (Mackinnon), or a number of such rhizoplasts 

 may be formed as in Mastigella vitrea. In these cases the blepharo- 

 plast divides independently of the nucleus at periods of cell division. 

 2. Parabasal Body and Blepharoplast.— As a centriole may be 

 contained in an endobasal body which consists largely of chromatoid 

 substance, so may a basal body be enclosed in chromatoid substance 



u.m 



Fig. 60. — Flagellum insertion. A, Phialonema cyclostomwm; B, Chilomastix 

 nu snili; < ', the same, encysted, {u.m.) Margin of undulating membrane in cytostome. 

 (A, Original; B, C, after Kofoid and Swezy.) 



of a blepharoplast, as shown by Goodey (1916) in the flagellate 

 Prowazekia (Bodo) saltans, or by Kofoid and Swezy (1915) in 

 Trichomonas augusta. Again, just as a centriole may be freed from 

 its enclosing chromatoid substance in an endosome, so may the 

 basal body be freed from the blepharoplast. In a similar way 

 the blepharoplast may be contained in an embedding chromatoid 

 mass of a cytoplasmic kinetic element, or it may be free from such 

 a mass. We may then have in the same cell a kinetic complex 

 consisting of one or more basal bodies, one or more blepharoplasts, 



