EUGLENOIDINA 239 



cation as in Euglena; cyst with a thick stratified wall; fresh or salt 

 water. 



E. viridis P. (Fig. 102, p). 50-70/1 by 5-13m; in fresh water; a 

 variety was reported from brackish water ponds. 



E. marina (da Cunha) (Fig. 102, q). Flagella unequal in length; 

 longer one as long as body, shorter one f ; body 40-50/^ by S-lO/x; 

 salt water. 



Genus Euglenamorpha Wenrich, Body form and structure similar 

 to those of Euglena, but with 3 flagella; in gut of frog tadpoles. One 

 species. 



E. hegneri W. (Fig. 102, r). 40-50^ long. 



Family 2 Astasiidae Biitschli 



Similar to Euglenidae in body form and general structure, but 

 without chromatophores; body is plastic, although it assumes 

 usually an elongated form; there is a cyto pharynx and cytostome, 

 the former being connected with the reservoir near which contractile 

 vacuole occurs; without stigma; fiagellum usually straight and its 

 free end vibrates in a characteristic manner; asexual reproduction by 

 longitudinal fission. 



Genus Astasia Dujardin. Body plastic, although ordinarily 

 elongate; fresh water or endoparasitic (?) in Cyclops, etc. Several 

 species. 



A. klebsi Lemmermann (Fig. 103, a). Spindle-form; posterior 

 portion drawn out; fiagellum as long as body; plastic; paramylon 

 bodies oval; 50-60)u by 13-20^; stagnant water. 



Genus Urceolus Mereschkowsky {Phialonema Stein). Body color- 

 less; plastic; flask-shaped; striated; a funnel-like neck; posterior 

 region stout; a single fiagellum protrudes from funnel and reaches in- 

 ward the posterior third of body; fresh or salt water. 



U. cyclostomus (Stein) (Figs. 8, /; 103, h). 25-50/x long; fresh 

 water. 



U. sahulosus (Stokes) (Fig. 103, c). Spindle-form; covered with 

 minute sand-grains; about 58iu long; fresh water. 



Genus Peranema Dujardin. Elongate with a broad, rounded or 

 truncate posterior end during locomotion; highly plastic when sta- 

 tionary; delicate pellicle shows a fine striation; fiagellum long, tapers 

 toward free end and vibrates; nucleus central; contractile vacuole; 

 holozoic and saprozoic; in stagnant water; often in hay infusion. 



P. trichophorum (Ehrenberg) (Figs. 26; 103, d). 20-70jti long; 

 body ordinarily filled with paramylon or starch grains derived from 

 Astasia, Menoidium, etc.; very common. 



