PROTOMONADINA 



271 



H. zachariasi V. (Fig. 117, d). Lorica cup-like; without stalk; 

 about 13m long; oval body 13m long; flagellum long; standing fresh 

 water. 



Genus Poteriodendron Stein. Similar to Bicosoeca; but colonial; 

 lorica vase-shaped; with a prolonged stalk; fresh water. 



P. petiolatum (S.) (Fig. 117, e). Lorica 17-50^ high; body 21-35/i 

 long; flagellum twice as long as body; contractile vacuole terminal; 

 standing fresh water. 



Genus Codonoeca James-Clark. With a stalked lorica; a single 

 flagellum; 1-2 contractile vacuoles; fresh or salt water. 



Fig. 117. a, Bicosoeca socialis, X560 (Lauterborn); b, Salpingoeca 

 fusiformis, X400 (Lemmermann); c, Diplosigopsis affinis, X590 (Franc^); 

 d, Histiona zachariasi, X440 (Lemmermann); e, Poteriodendron petiola- 

 tuni, X440 (Stein); f, Codonoeca inclinata, X540 (Kent); g, Lagenoeca 

 ovata, x400 (Lemmermann). 



C. inclinata Kent (Fig. 117, /). Lorica oval; aperture truncate; 

 about 23m long; stalk twice as long; body oval, about 17m long; 

 flagellum 1.5 times as long as body; contractile vacuole posterior; 

 standing fresh water. 



Genus Lagenoeca Kent. Resembles somewhat Salpingoeca; with 

 lorica; but without any pedicel between body and lorica; solitary; 

 free-swimming; fresh water. 



L. ovata Lemmermann (Fig. 117, g). Lorica oval, 15m long; body 

 loosely filling lorica; flagellum 1.5 times body length; fresh water. 



Family 4 Oikomonadidae Hartog 



Genus Oikomonas Kent. A rounded monomastigote; uninucleate; 

 encystment common; stagnant water, soil and exposed faecal mat- 

 ter. 



