512 



PROTOZOOLOGY 



ity; diameter about 18/x; envelope 25^; fresh water. 



R. infestans Wetzel. Body 20-40/* in diameter; thin axopodia 

 twice the body diameter; without radial spicules; feeds on ciliates 

 (Wetzel, 1925). 



Genus Wagnerella Mereschkowsky. Spherical, supported by a 



Fig. 216. a, Clathrella foreli, X250 (Penard); b, Acanthocystis aculeata, 

 X300 (Stern); c, Pompholyxophrys punicea, X260 (West); d, Raphidio- 

 phrys pallida, X300 (Penard); e, Raphidocyslis tubifera, X500 (Penard); 

 f, Wagnerella borealis, X75 (Kuhn); g, Pinaciophora fltiviatilis, X250 

 (Penard). 



