HOLOTRICHA 



711 



Fig. 304. a, Holophrya simplex, X800 (Roux); b, Lagynophrya mutans, 

 X380 (Kahl); c, Spasmostoma viride, X330 (Kahl); d, Urotricha agilis, 

 X530 (Stokes); e, U. far da, X470 (Lieberkiihn); f, g, Plagiocampa ma- 

 rina (Noland) (f, X400; g, anterior end, X670); h, Chilophrya utahensis, 

 X840 (Pack); i, C. labiata, X500 (Edmondson); j, Platyophrya lata, X280 

 (Kahl); k, Stephanopogon colpoda, non-ciliate side, X500 (Kahl); 1, 

 Prorodon discolor, X330 (Biitschli); m, Pseudoprorodon farctus, X270 

 (Roux); n, o, Coelosomides marina, X245 (Faure-Fremiet) (n, silver-im- 

 pregnated surface view; o, optical section); p, q, Placus socialis, X530 

 (Noland) (p, anterior end view). 



