PROTOMONADINA 



359 



R. splendidum S. (Fig. 150, d, e). Oval; about 13m long; flagella 

 about 2-3 times body length; fully grown colony 350/z high. 



Genus Spiromonas Perty. Elongate; without gelatinous covering; 

 spirally twisted; 2 flagella anterior; solitary; fresh water. 



S. augusta (Dujardin) (Fig. 150,/). Spindle-form; about 10ju long; 

 stagnant water. 



Fig. 150. a, Amphimonas globosa, X540 (Kent); b, Spongomonas uvella, 

 X440 (Stein); c, Cladomonas fruticulosa, X440 (Stein); d, e, Rhipidoden- 

 dron splendidum (d, a young colony, X440; e, a freeswimming individual, 

 X770) (Stein); f, Spiromonas augusta, X1000 (Kent); g, Diplomita soci- 

 alis, X1000 (Kent); h, Streptomonas cordata, X890 (Lemmermann) ; i, 

 Dinomonas vorax, X800 (Kent). 



Genus Diplomita Kent. With transparent lorica; body attached 

 to bottom of lorica by a retractile filamentous process; a rudimen- 

 tary stigma (?) ; fresh water. 



D. socialis K. (Fig. 150, g). Oval flagellum about 2-3 times the 

 body length; lorica yellowish or pale brown; broadly spindle in form; 

 about 15ju long; pond water. 



Genus Streptomonas Klebs. Free-swimming; naked; distinctly 

 keeled; fresh water. 



S. cordata (Perty) (Fig. 150, h). Heart-shaped; 15/u by 13/*; rota- 

 tion movement, 



