312 



PROTOZOOLOGY 



Family Hexamitidae Kent 

 Genus Hexamita Dujardin (Octomitus Prowazek). Pyriform; 2 

 nuclei near anterior end; 6 anterior and 2 posterior flagella; 2 axo- 

 styles; 1-2 contractile vacuoles in free-living forms; cytostome ob- 

 scure; endoplasm with refractile granules; encystment; in stagnant 

 water or parasitic. 



Fig. 147. a, Hexamita inflata, X600 (Klebs); b, c, trophozoite and cyst 

 oi H.intestinalis, X 1600 (Alexeieff); d, i/. saZmonts, X2100 (Davis); e,^. 

 cryptocerci, X1600 (Cleveland); f, Trepomonas agilis, X1070 (Klebs^; 

 g, T. rotans, X710 (Lemmermann) ; h, Gyromonas ambulans, X530 

 (Seligo); i, Trigonomonas compressa, X490 (Klebs); j, Urophagus rostratus, 

 X800 (Klebs). 



H. inflata D. (Fig. 147, a). Broadly oval; posterior end truncate; 

 13-25m by 9-15^1; in stagnant water. 



H. intestinalis D. (Fig. 147, 6, c). 10-16^ long; in intestine of 



