180 ELECTRON-MICROSCOPIC STRUCTURE OF PROTOZOA 



Plate XXI 



Fig. 76. Part of pellicle fragment of sonicated "Paramecium 

 aurelia, viewed from inside, showing bundles of kinetodesmal 

 fibrils. Cilia seen clearly beyond edge of fragment at upper right, 

 are vaguely discernible through pellicle. X 21,000. From Metz, 

 Pitelka and Westfall, 1953. 



Fig. 77. Cross-section of part of pharyngeal basket of Nassu/a 

 aurea, showing fibrillar constitution of trichites. X 17,000. From 

 Rouiller, Faure-Fremiet and Gauchery, 1956d. 



Fig. 78. Oblique section of elastic part of stalk of Zoothamnium 

 alternans, showing striated cylinders that are ciliary outgrowths, 

 embedded in matrix, x 14,000. From Rouiller, Faure-Fremiet and 

 Gauchery, 1956a. 



Fig. 79. Section through part of infundibular fiber of Campanella 



umbellaria. Cross-sectioned kinetosomes in row along top, two of 



them linked to filaments of infundibular fiber. X 42,000. From 



Rouiller and Faure-Fremiet, 1957b. 



