PHYLUM PROTOZOA. FLAGELLATES 



49 



Order 3. Dinoflagellina. Two flagella, 

 usually 1 forward and the other 

 in a groove around the body; 

 mostly marine. Ex. Noctiluca 

 scintillans (Fig. 21). 



Order 4. Phytomonadina. Cellulose body 

 wall; no cytostome; many colo- 

 nial. Ex. Volvox globatoT (Fig. 

 22). 



Order 5. Euglenoidina. Usually 1 or 2 

 flagella, a cytostome and cyto- 

 pharynx; often chromatophores 

 and eye spot. Exs. Euglena and 

 Phacus (Fig. 21). 

 Subclass 2. Zoomastigina (Gr. zoion, ani- 

 mal; mastix, whip) . Animal-like; 

 no chromatophores; no sexual re- 

 production known. 



Order 1. Rhizomastigina or Pantosto- 

 matida. Colorless; amoeboid; 1 

 flagellum. Ex. Mastigamoeba 

 aspera (Fig. 21). 



Order 2. Protomonadina. Colorless; often 

 amoeboid; 1 to 3 flagella. Ex. 

 Codosiga (Fig. 21). 



Order 3. Polymastigina. Mostly intestinal 



inhabitants; 3 to 8 flagella; some 

 bilaterally symmetrical. Ex. Gi- 

 ardia lamblia (Fig. 37, p. 72). 

 Order 4. Hypermastigina. Intestinal in- 

 habitants of termites (p. 638) 

 and cockroaches; many flagella; 

 often very complex. Ex. Spiro- 

 trichonympha flagellata (Fig. 

 447). 



SELECTED COLLATERAL 

 READINGS 



Allen, W.E. "Red Water in La Jolla Bay 

 (California) in 1945." Trans., Am. Micro- 

 scopical Soc, 55:149-153, 1946. 



Gojdics, Mary. The Genus Euglena. Univ. of 

 Wisconsin Press, Madison, 1953. 



Hall, R.P. Protozoology. Prentice-Hall, Engle- 

 wood Cliffs, N.J., 1953. 



Jahn, T.L. "The Euglenoid Flagellates." Quart. 

 Rev. BfoZ., 21:246-274, 1946. 



Pennak, R.W. Fresh-water Invertebrates of the 

 United States. Ronald Press, New York, 

 1953. 



