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 elongate-oval, anterior margin with a lip-like projection. Flagella 

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

 Length 25 to 40 ^. Stagnant infu-sions; very common. 



FIG. 428. Chilomonas paramecium. X 350. (After Conn.) 



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

 monas Cryptomonas Ehrenberg. 



Representative species. . Cryptomonas ovata Ehrenberg 1831. 



Chlorophjl bands two in number, extending longitudinally through the 

 body. Length 50 M. Among algae. 



FIG. 429. Cryptomonas ovata. 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. Flagella two, un- 

 equal Uroglena Ehrenberg. 



Representative species Uroglena americana Calkins 1891. 



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 fishy taste. 



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

 (After Conn.) 



149 (148) Not colored 150 



150 (151) Colonies of dichotomously branching tubes. . Cladomonas Stein. 



