156 ELECTRON-MICROSCOPIC STRUCTURE OF PROTOZOA 



Plate XVII 



Fig. 63. Approximately transverse section of rostrum of 

 Trichonympha sp., showing rostral tube and radiating rows of 

 kinetosomes. X 11,500. 



Fig. 64. Section from centriole region of Barbulanympha sp. Part 

 of centriolar complex appears finely filamentous. Arrows indicate 

 two kinetosomes that are distinctly out of alignment with those of 

 flagellated areas. X 28,000. From J. E. Cook, unpublished. 



Fig. 65. Oblique thick section through anterior end of rostrum of 

 Trichonympha sp., showing hemispherical complex at top center, 

 parabasal filaments composing rostral tube wall, posterior extension 

 of centriole in lumen of tube, rows of radiating kinetosomes. 

 X 15,000. From Pitelka and Schooley, 1958. 



Fig. 66. Section through posterior extremity of centriole in 



dividing Barbulanympha sp., showing spindle fibers diverging from 



homogeneously dense centrosome. X 3,500. From J. E. Cook, 



unpublished. 



