EUGLENOIDINA 



301 



by longitudinal fission; also by swarmers, possessing a flagellum and 

 a stigma; fresh water. Several species. 



C. vesiculosum E. (Fig. 121). Solitary or colonial, made up of two 

 to eight individuals; flagellate form ovoid to spindle; 22 ju by 12^; 

 seven to ten elongate chromatophores along the periphery; flagellum 



Fig. 121. Colacium vesiculosum (Johnson), a, diagram showing the life 

 cycle (a-d, palmella stage; e, formation of flagellate stage; f, formation 

 of flagellate stage by budding of Palmella stage; g, flagellate stage; h, 

 attached stage); b, flagellate and c, stalked form on a crustacean, X1840. 



one to two times the body length; a stigma; many paramylon bodies; 

 palmella stage conspicuous; stalked form (Johnson, 1934). 



Genus Eutreptia Perty (Eutreptiella da Cunha). With 2 flagella at 

 anterior end; pellicle distinctly striated; plastic; spindle-shaped dur- 

 ing movement; stigma; numerous discoid chromatophores; pyren- 

 oids absent; paramylon bodies spherical or subcylindrical ; multipli- 

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

 water. 



E. viridis P. (Fig. 120, i). 50-70 M by 5-13;u; in fresh water; a 

 variety was reported from brackish water ponds. 



E. marina (da Cunha) (Fig. 120, j). Flagella unequal in length; 



