EUGLENOIDINA 



295 



cylinder, with a sharply pointed posterior end; flagellum short, about 

 I the body length; spiral striation of pellicle very delicate; numerous 

 discoid chromatophores; several paramylon bodies, rod-form and 

 12-20ju long; nucleus central; stigma distinct; movement sluggish. 



Fig. 118. Species of Euglena (Johnson), a, Euglena pisciformis, X855; 

 b, E. viridis, X400; c, E. acus, X555; d, E. spirogyra, X460; e, E. oxyuris, 

 X200; f, E. sanguinea, X400; g, E. deses, X315; h, E. gracilis, X865; i, 

 E. tripteris, with optical section of body, X345; j, E. ehrenbergi, X145; 

 k, E. terricola, X345; 1, E. sociabilis, X320; m, two individuals of E. 

 klebsi, X335; n, two individuals of E. rubra, X355. 



E. spirogyra E. (Fig. 118, d). 80-125 ;u by 10-35m; cylindrical; an- 

 terior end a little narrowed and rounded, posterior end drawn out; 

 spiral striae, made up of small knobs, conspicuous; many discoid 

 chromatophores; two ovoidal paramylon bodies, 18-45/x by 10-18/x, 

 one on either side of centrally located nucleus; flagellum about \ the 

 body length; stigma prominent; sluggish. 



E. oxyuris Schmarda (Fig. 118, e). 1 50-500 m by 20-40^; cylindri- 



