346 Ciliophora 



Fig. 7. 6. A. Prorodon teres Ehrbg., longitudinal section showing circum- 

 pharyngeal trichites; x240 (after Wetzel). B. Platophrya spumacola Kahl, 

 x450 (after K.). C. Lagynophrya simplex Kahl, 35-40,u (after K.). D. Placiis 

 socialis (Fabre-Domergue), slit-like cytostome, macronucleus, contractile 

 vacuole; x680 (after Noland). E. Plagiocampa longis Kahl, 70-80;x (after K.). 

 F. P. marina Kahl, syncilia along cytostome; x850 (after Noland). G. 

 Holophrya obloiiga Maupas, macronuclear chain, contractile vacuole and 

 accessory canals; x60 (after De Morgan). H. Holophrya (Trachelocerca}) 

 coronata De Morgan, anterior end of body; schematic (after De M.). I, J. 

 Helicoprorodon gigas (Kahl) Faure-Fremiet; lateral view, xl650; anterior end 

 of body, schematic (after F-F.). K, L. Trachelocerca enlzi Kahl, length 

 reaches 270/x; extended specimen and longitudinal optical section of the 

 anterior end (after K.). M. Spasmostoma viride Kahl, 50-60/^ (after K.). N. 

 Prorodon parafarctus Wang and Nie, x300 (after W. k N.). 



