382 Ciliophora 



Fig. 7. 29. A. Balantidium praenucleatum Kudo and Meglitch, longitu- 

 dinal optical section; Feulgen preparation; x475 (after K. & M.). B, C. 

 Transverse sections of Balantidium coli: anterior region showing peristome 

 (B); more posterior section through the pharynx (C), x550 (after Rees). D, 

 E. Balantidium sushilii Ray: longitudinal section through peristome (D), 

 x750; transverse section (E) through peristome near anterior end, x540 (after 

 R.). F-H. Transverse sections of Bursaria truncatella O. F. M.: anterior por- 

 tion of deep peristome (F), near posterior end of peristome (G), and at 

 level of cytostome (H); x96 (after Wetzel). I. Bursaria truncatella, ventral 

 view of specimen 600yu long (after Kahl). J. Bursaridium pseudobursaria 

 (Faure-Fremiet) Kahl, ventral view; part of the dorsal peristomial wall is 

 striated but not ciliated; x260 (after Wang and Nie). K. Chattonidium 

 setense Villeneuve, membranelles and undulating membrane, macronucleus, 

 postero-axial cavity (cytoproct?); xl88 (after Villeneuve-Brachon). L. C. 

 setense, polar view, membrane, bases of membranelles; x250 (after V-B.). 



