342 



PROTOZOOLOGY 



Genus Histiona Voigt. With lorica; but body without attaching 

 filament; anterior end with lips and sail-like projection; fresh water. 

 Morphology (Pascher, 1943). 



H. zachariasi V. (Fig. 139, d). Lorica cup-like; without stalk; 

 about 13/a long; oval body 13/x long; flagellum long; standing fresh 

 water. 



Genus Poteriodendron Stein. Similar to Bicosoeca; but colonial; 



Fig. 139. a, Bicosoeca socialis, X560 (Lauterborn); b, Salpingoeca 

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

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

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

 ovata, X400 (Lemmermann). 



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

 movement (Geitler, 1942). 



P. petiolatum (S.) (Fig. 139, e). Lorica 17-50^ high; body 21-35/t 

 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. 



C. inclinata Kent (Fig. 139, /). 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. 139, g). Lorica oval, 15/x long; body 

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



Genus Stelexomonas Lackey. A single collar longer than body; 



