230 UNIVERSITY OF COLORADO STUDIES 



Family ANISONEMID^ 



(3) Anisonema Dujardin. Subcuneate in form, with two flagella, one directed 

 backward, trailing beyond the end of the body; a distinct mouth. A. acinus Duj. 

 Length 25 m- 



Order EUGLENIDA 



Flagella one or two, at the base of which is a mouth; often possessing chlorophyll 

 (Edmondson). 



Family EUGLENID-ffi 

 Usually green, with red "eye-spots." 



(4) Euglena Ehrenberg. Elongate, usually bright green; one flagellum. E. 

 viridis Ehr.*; E. deses Ehr.* The first of these is pointed, the second blunt, at the 

 aboral end. 



(5) Eutreptia Perty. Like an elongate Euglena, but with two flagella, and 

 remarkable peristaltic movements. E. viridis Perty. 



(6) Phacus Nitzsch. Flat, more or less leaf-like, pointed at the aboral end; color 

 green. Known from Euglena by the much broader form. P. pleuronectes 

 (Miiller)*; P. longicaiidus Ehr.* The latter has the pointed end relatively long, 

 usually straight. 



Family ASTASIID.S 

 Body colorless and without eye-spots; shape much like Euglena. 



(7) Astasia Ehrenberg. Elongate, plastic, changeable in form; flagellum single. 

 A. trichophora Ehr.* 



Family PERANEMID^ 

 Body persistent in shape and plastic; flagella one or two (Edmondson). 



(8) Petalomonas Stein. Broad-cuneate, the aboral end rounded; one long 

 flagellum; shape persistent. There is a groove leading back from the base of the 

 flagellum. P. mediocanellata Stein. 



Class PHYTOMASTIGOPHORA 



Flagellated forms in which the plant characteristics, if not predominant, are 

 clearly marked. Here are classified the majority of complex colony-forming 

 types, but the single cells are invariably of simple structure, possessing eye-spots, 

 pyrenoids, and yellow, green or brown chromatophores (Calkins). 



Subclass PHYTOFLAGELLATA 

 Order CHRYSOFLAGELLIDA 



With yellow chromatophores. 



Family CRYPTOMONADID^ 



(9) Chilomonas Stein. Elongate-oval, anterior end with a lip-like projection; 

 two flagella, both directed in advance. C. paramcecium (Ehr.).* Length 25-40 fi. 



