PROTOMONADINA 



361 



Genus Dendromonas Stein. Colonial; individuals without lorica, 

 located at end of branched stalks; fresh water among vegetation. 



D. virgaria (Weisse) (Fig. 151, h). About 8/1 long; colony 200/x 

 high; pond water. 



Fig. 151. a, Monas guttula, X620 (Fisch); b, M. elongata, X670 

 (Stokes); c, M. socialis, X670 (Kent); d, M. vestita, X570 (Stokes); 

 e, Stokesiella dissimilis, X500 (Stokes); f, S. leptostoma, X840 (Stokes); 

 g, Stylobryon abbotti, X480 (Stokes); h, Dendromonas virgaria, a young 

 colony of, X670 (Stein); i, Cephalothamnium cyclopum, X440 (Stein); 

 j, k, Anthophysis vegetans (j, part of a colony, X230; k, an individual, 

 X770) (Stein). 



Genus Cephalothamnium Stein. Colonial; without lorica, but in- 

 dividuals clustered at the end of a stalk which is colorless and rigid; 

 fresh water. 



C. cyclopum S. (Fig. 151, i). Ovoid; 5-10/x long; attached to body 

 of Cyclops and also among plankton. 



Genus Anthophysis Bory (Anthophysa). Colonial forms, some- 

 what similar to Cephalothamnium; stalks yellow or brownish and 

 usually bent ; detached individuals amoeboid with pointed pseudo- 

 podia. 



A. vegetans (Miiller) (Fig. 151, j, k). About 5-6m long; common in 

 stagnant water and infusion. 



