36 ELECTRON-MICROSCOPIC STRUCTURE OF PROTOZOA 



Plate IV 



Fig. 13. Section of Hyalodiscus simplex, showing cytoplasmic 

 structure and inclusions. Note variations in density of cytoplasmic 

 matrix in inclusion-free ectoplasm. Vesicles limited by unit mem- 

 branes visible in cytoplasm; one marked by arrow has fragmented 

 membrane. Numerous, opaque particles of various sizes are charac- 

 teristic of most amebae; their significance is unknown. X 46,600. 

 From Wohlfarth-Bottermann, 1960b. 



Fig. 14. Tangential section through cortex of minute vesicles 

 surrounding digestive vacuole of Pelomyxa carolinensis. X 7,500. 

 From Roth, 1960a. 



Fig. 15. Cross-sections through several kinetosomes of the 

 complex zooflagellate, Barbulanympha sp., showing skewed triplet 

 fibrils, cartwheel arrangement of filaments in lumina, and pattern 

 of filaments around and between kinetosomes. X 60,400. From 

 J. E. Cook, unpublished. 



Fig. 16. Section of nucleus of Bodo saltans, showing double 

 envelope with pore at left center; cytoplasmic extensions of outer 

 envelope layer at arrows. Central, coarsely granular nucleolus; 

 peripheral, finely granular chromatin. X 56,000. 



