264 



PROTOZOOLOGY 



Family 3 Ochromonadidae Pascher 



With 2 unequal flagella; no pellicle and plastic; contractile vacu- 

 oles simple; with or without a delicate test; solitary or colonial; 

 free-swimming or attached. 



Genus Ochromonas Wyssotzki. Solitary or colonial; body surface 

 delicate; posterior end often drawn out for attachment; 1-2 chro- 

 matophores; usually with a stigma; encystment; fresh water. Many 

 species (Doflein, 1921, 1923). 



0. mutdbilis Klebs (Fig. 108, a). Ovoid to spherical; plastic, 15-30m 

 by 8-22 M . 



0. ludibunda Pascher (Fig. 108, b). Not plastic; 12-17m by 6— 12ju. 



0. granulans Doflein. No stigma; 5-12/z long (Doflein, 1922). 



Fig. 108. a, Ochromonas mutdbilis, X670 (Senn); b, 0. ludibunda, X540 

 (Pascher); c, Uroglena volvox, X430 (Stein); d, Uroglenopsis americana, 

 X470 (Lemmermann) ; e, Cyclonexis annularis, X540 (Stokes); f, Dino- 

 bryon sertularia, X670 (Scherffel) ; g, Hyalobryon ramosum., X540 (Lauter- 

 born); h, Stylopyxis viucicola, X470 (Bolochonzew). 



