254 



PROTOZOOLOGY 



Fig. 118. a, AmpJmnonas globosa, X540 (Kent); b, Spongomonas 

 uvella, X440 (Stein); c, Cladomonas fruticulosa, X440 (Stein); d, e, 

 Rhipidodendron splendidum (d, a young colony, X440; e, a free- 

 swimming individual, X770) (Stein); f, Spiromonas augusta, XlOOO 

 (Kent); g, Diplomita socialis, XlOOO (Kent); h, Streptomonas cordata, 

 X890 (Lemmermann); i, Dinomonas vorax, X800 (Kent). 



D. socialis K. (Fig. 118, g). Oval; flagellum about 2-3 times 

 the body length; lorica yellowish or pale brown; broadly spindle 

 in form; about 15/x long; pond water. 



Genus Streptomonas Klebs. Free-swimming; naked; distinctly 

 keeled; fresh water. 



S. cordata (Perty) (Fig. 118, h). Heart-shaped; IS^t by 13/^; rota- 

 tion movement. 



Genus Dinomonas Kent. Ovate or pyriform, plastic, free-swim- 

 ming; 2 flagella, equal or sub-equal, inserted at anterior extrem- 

 ity, where large oral aperture visible only at time of food inges- 

 tion, is also located, feeding on other flagellates; vegetative 

 infusions. 



D. vorax K. (Fig. 118, i). Ovoid, anterior end pointed; 15-16ju 

 long; flagella longer than body; hay infusion and stagnant water. 



