HOLOTRICHA 



589 



C. cucullulus (Miiller) {Chilodon steini Blochmann) (Figs. 52; 279, 

 c-e). 19-20 ventral ciliary rows; oral basket with about 12 rods and 

 with 3 preoral membranes; macro nucleus oval, a characteristic con- 

 centric structure; micro nucleus small; body 100-300ju long, most 

 often 130-1 50/i long; fresh and brackish water. 



.^\XU^^ 



Fig. 279. a, b, Cryptopharynx setigerus, X650 (Kirby); c-e, Chilodonella 

 cucullulus (c, X270 (Stein); d, oral region; e, nucleus (Penard)); f, C. 

 caudata, XlOOO (Stokes); g, C. fluviatilis, X800 (Stokes); h, C. cyprini, 

 X670 (Moroff); i, Allosphaerium palustris, XlOOO (Kidder and Sum- 

 mers). 



C. caudata (Stokes) (Fig. 279,/). About 42^ long; standing water. 



C. fluviatilis (S.) (Fig. 279, g). About 50m long; fresh water. 



C. uncinata (Ehrenberg) (Fig. 86). 50-90/x long; about 11 ventral 



