NUCLEI AND KINETIC ELEMENTS 



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blepharoplast, blepharoplast, and parabasal body, are all indepen- 

 dent; (5) Giordia aiicj-iista, in which the independent blepharoplast, 

 basal bodies, and parabasal body, are all double and arranged in 

 perfect bilateral symmetry; (0) Caloin/nipha grassii (Fig. 49), in 

 which nuclei, ])arabasal bodies, blepharoplasts and basal bodies are 



n 



m 



Fig. 48. — Relation of parabasal to nucleus. A, CrUhidia curyophthalmi endosome 

 of nucleus and parabasal connected by rhizoplast; B, origin of parabasal from endo- 

 some of nucleu.s; C and /), differentiation of parabasal and rhizoplasts; E, Trypano- 

 soma cruzi, and F, Crithidia leptocoridis for comparison. (After McCulloch.) 



multiple and in which axial threads (rhizoplasts) unite to form a 

 central axial supporting rod; (7) Trichonympha ccnnpanida in which 

 the blepharoplast (centroblepharoplast) acts as a centrosome in 

 mitosis while long rhizoplasts connecting distal basal bodies with 

 the blepharoplast form a complex radial system of astral rays (Figs. 

 47 to 51). 

 7 



