P ROTO MO NAD ID A 



151 



is embedded, while the other flagellum trails. A single nucleus. 

 Minute forms. 



Rhynchomonas nasuta (Stokes) (Fig. 56, /, m). In fresh 

 water and also coprozoic. 



Genus Prowazekella Alexeiefif. Elongated pyriform. Two 

 flagella from the anterior end; one is directed anteriorly, and 

 the other posteriorly. A single nucleus anterior. The encysted 



Fig. 56 a-i. Bodo caudatus. X 750 (After Sinton). a-d, feeding 

 on a Bacillus; e-i, excystation in culture, 

 j, k. B. edax. X700 (After Kiihn). 

 1, m. Rhynchomonas nasuta. X900 (After Parisi). 

 n. Prowazekella lacertae. X 1250 (After Kiihn). 

 o-q. Embadomonas intestinalis. X1900 (After Jepps). 

 r. Phyllomitus undulans. X500 (After Stein), 

 s. Colponema loxodes. X325 (After Stein), 

 t, u. Cercomonas longicauda. X 1000 (After Wenyon). 

 V. C. crassicauda. X 1000 (After Dobell). 



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

 to a marked degree. Exclusively parasitic; in the intestine of 

 various species of the lizard. 



Prowazekella lacertae (Grassi) (Fig. 56, n). In the intestine 

 of lizards belonging to the genera Lacerta, Tarentola, etc. 



Genus Embadomonas Mackinnon. Body small, ovoid or 



