102 



BIOLOGY OF rilE PROTOZOA 



Camptoncma nutans, etc.). In the ordinary vegetative activities 

 of the cell, radiating fibers starting from the central grain extend 

 through the protoplasm to the periphery, where they form the axial 

 filaments of the pseudopodia (Fig. 08). In division stages of the 



Fig. 53. — Relation of axial filaments to nuclei. A and B, Camptonema nutans 

 with nuclei partly embedded in the .suljstance of the axial filaments; (x) axial fila- 

 ment; C, section of Actiiwphrys sol with axial filaments arising from intranuclear 

 granules in recently divided nuclei. (After Schaudinn.) 



cell, the central grain first divides forming an amphiaster consisting 

 of centrosomes, centrodesmose and astral rays made up of the radi- 

 ating fibrils (Fig. 60— see also Trichonympha campaniila). The cen- 

 tral grain, however, takes no part in reproduction by budding, 



