PROTOMONADINA 257 



Genus Bodo Ehrenberg {Prowazekia Hartmann et Chagas). 

 Small, ovoid, but plastic; cytostome anterior; nucleus central or 

 anterior; flagella connected \^^th 2 blepharoplasts in some species; 

 encystment common; in stagnant water and coprozoic. Numerous 

 species. 



B. caudatus (Dujardin) (Fig. 120, a, 6). Highly flattened, 

 usually tapering posteriorly; ll-22ju by 5-10)u; anterior flagellum 

 about body length, trailing flagellum longer; blepharoplast ; 

 cysts spherical; stagnant water. 



B. edax Klebs (Fig. 120, c). Oval with pointed anterior end; 

 11-15^1 by 5-7/x; stagnant water. 



Genus Pleuromonas Perty. Naked, somewhat amoeboid; 

 usually attached with trailing flagellum; active cytoplasmic 

 movement; fresh water. 



P. jaculans P. (Fig. 120, d). Body G-lO^t by about 5ai; flagellum 

 2-3 times body length; 4-8 young individuals are said to emerge 

 from a spherical cyst ; stagnant water. 



Genus Rhynchomonas Klebs (Cruzella Faria, da Cunha et 

 Pinto). Similar to Bodo, but there is an anterior extension of 

 body, in which one of the flagella is embedded, while the other 

 flagellum trails; a single nucleus; minute forms; fresh or salt 

 water; also sometimes coprozoic. 



R. nasuta (Stokes) (Fig. 120, e). Oval, flattened; 5-6yLt by 2-3 fx; 

 fresh water and coprozoic. 



R. marina (F., C. et P.). In salt water. 



Genus Proteromonas Kunstler (Prowazekella Alexeieff). Elon- 

 gated pyriform; 2 flagella from anterior end, one directed an- 

 teriorly and the other, posteriorly; nucleus anterior; encysted 

 stage is remarkable in that it is capable of increasing in size to a 

 marked degree; exclusively parasitic; in gut of various species of 

 lizards. 



P. lacertae (Grassi) (Figs. 9, h; 120, /). Elongate, pyriform; 

 10-30/z long; gut of lizards belonging to the genera Lacerta, 

 Tarentola, etc. 



Genus Retortamonas Grassi (Emhadomonas Mackinnon). 

 Spindle-form or pyriform, drawn out posteriorly; ventral side 

 usually more convex than dorsal side; large oval pouch on ventral 

 side, about 1/3 as long as body; nucleus anterior; 2 flagella longer 

 than body, anterior flagellum shorter than the posterior one which 

 usually shows 2 or 3 undulations; cysts ovoid; parasitic in gut of 

 various animals. 



