FLAGELLATE PROTOZOA (MASTIGOPHORA) 



261 



144 (143) Shaped as Cyathomonas, but with pharynx and without refractive 



bodies Chilomonas Ehrenberg. 



Representative species. . Chilomonas Paramecium Ehrenberg 1831. 



Body elongatc-oval, anterior margin with a lip-like projection. Flagelia 

 subequal in length. Endoplasm usually enclosing dark-colored corpuscles. 

 Length 25 to 40 m- Stagnant infusions; very common. 



Fig. 428. Chilomonas Paramecium. X 350. (.\fter Conn.) 



145 (142) With two brown or green chromatophores. Shaped as Chilo- 

 monas Cryptomonas Ehrenberg. 



Representative species. . Cryptomonas ovata YAircnhtrg 1831. 



ChIoroph>l bands two in number, extending longitudinally through the 

 body. Length 50 m- Among algae. 



Fig. 42g. Cryptomonas ovala. X 350. (.After Conn.) 



146 (139) Forming colonies 147 



147 (154) Individuals imbedded in a gelatinous mass 148 



148 (149) Spherical colonies; individuals usually with two yellow chroma- 

 tophores and eye-spot. Free-swimming. Flagelia two, un- 

 equal Uroglena Ehrenberg. 



Representative species Uroglena americana Qdl^ms i^(M. 



Cells very numerous, arranged around the periph- 

 ery of a gelatinous mass. Posterior ends of the 

 cells rounded, with no means of connection with 

 each other except by the matrix. 



Sometimes found in reservoirs, causing the water 

 to have a fishv taste. 



Fig. 430. Uroglena americana. Individual cells X 1500. 

 (After Conn.) 



149(148) Not colored 150 



150 (151) Colonies of dichotomously branching lubes. . ClaJomonus Stein. 



