PROTOMONADINA 259 



P. undulans S. (Fig. 120, j)- Ovoid; 21-27yu long; trailing flagel- 

 lum much longer than anterior one; stagnant water. 



Genus Colponema Stein. Body small; rigid; ventral furrow 

 conspicuous, wide at anterior end; one flagellum arises from 

 anterior end and the other from middle of body; fresh water. 



C. loxodes S. (Fig. 120, A;). 18-30^1 by 14/^; cytoplasm with re- 

 fractile globules. 



Genus Cercomonas Dujardin. Biflagellate, both flagella arising 

 from anterior end of body; one directed anteriorly and the other 

 runs backward over body surface, becoming a traihng flagellum; 

 plastic; pyriform nucleus connected with the basal granules of 

 flagella; spherical cysts uninucleate; fresh water or coprozoic. 



C. longicauda D. (Fig. 120, I). Pyriform or ovoid; posterior end 

 drawn out; 18-36/x by 9-14/^; flagella as long as body; pseudo- 

 podia; fresh water and coprozoic. 



C. crassicauda D. (Fig. 120, m). IO-ICai by 7-10/u; fresh water 

 and coprozoic. 



References 



Holmes, F. O. 1925 The relation of Herpetomonas elmassiani 

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Laveran, a. and F. Mesnil. 1912 Trypanosomes et Trypano- 

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Lemmermann, E. 1914 Protomastiginae. Susswasserjl. Deutsch- 

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MiNCHiN, E. A. and J. D. Thomson. 1915 The rat trypanosome, 

 Trypanosoma lewisi, in its relation to the rat flea, Cerato- 

 phyllus fasciatus. Quart. Jour. Micr. Sci., Vol. 60. 



Nelson, R. 1922 The occurrence of Protozoa in plants affected 

 with mosaic and related diseases. Michigan Agr. Coll. Bot. 

 Stat., Tech. Bull. No. 58. 



Reynolds, B. D. 1934 Studies on monad flagellates. I, II. 

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Wenyon, C. M. 1926 Protozoology, Vol. 1. London. 



