12 ELECTRON-MICROSCOPIC STRUCTURE OF PROTOZOA 



Plate I 



Fig. 1 . Section of cytoplasm of a small zooflagellate, Bodo saltans, 

 showing abundant Palade particles, granular membranes, and 

 several sections through a single mitochondrion. X 45,000. 



Fig. 2. Section through one mitochondrion and parts of two 

 others in the ciliate Colpidium campylum, illustrating microtubular 

 configuration of internal membranes and, in mitochondrion at 

 bottom, a finely filamentous inclusion. Double membranes sur- 

 rounding mitochondria are distinct in some areas ; elsewhere they are 

 cut obliquely. X 45,000. 



Fig. 3. Section through several Golgi bodies composing part of 

 parabasal apparatus of the complex zooflagellate, Joenia annectans. 

 At proximal end of each pile (arrows) is parabasal fibril cut in cross- 

 section. Cluster of bodies occupying upper half of figure represents 

 a probable method of Golgi reproduction. Four discrete piles are 

 evident proximally, each with its own parabasal fibril. Distally, 

 several sacs are continuous through three or all four piles, 

 suggesting that one original body is being segmented into four. 

 X 31,000. From Grasse, 1957c. 



Fig. 4. Section through mitochondrion of Euglena gracilis, showing 

 radially arranged cristae. X 50,000. From Gibbs, 1960. 



Fig. 5. Section of Bodo saltans, showing bulbous kinetoplast at 



center, continuous at left and right with mitochondrion. X 22,500. 



From Pitelka, 1961b. 



