206 ELECTRON-MICROSCOPIC STRUCTURE OF PROTOZOA 



Plate XXIV 



Fig. 86. Transverse section into cortex of ophryoscolecid ciliate, 

 in region where layers of pellicle are thin. Outer membrane covers 

 homogeneous second layer; below this, longitudinal fibrils are seen 

 as orderly bundles of circular profiles ; innermost layer is composed 

 of transversely oriented filaments. X 32,000. From Noirot- 

 Timothee, 1960. 



Fig. 87. Section of ophryoscolecid ciliate showing kinetosomes of 

 adoral ciliated band with fine interconnecting or oblique fibrils; 

 massive, dense, banded basal rods ; and retrociliary fibers composed 

 of regularly packed fibrils. X 32,000. From Noirot-Timothee, 1960. 



Fig. 88. Section through anterior end of esophagus of ophryo- 

 scolecid ciliate. Deeply folded esophageal wall is scalloped line 

 along left and lower right sides of picture. Cavities at upper right 

 are sections through lumen of peristomal canal, subtended by 

 fibrillar sheets. Retrociliary fibers, composed of packed fibrils, are 

 cross-sectioned above and within esophagus, x 21,000. From 

 Noirot-Timothee, 1960. 



