Fig. 34- 



Euglena mridis\ ?«, the so-called mouth; «, the nucleus; ^, the 

 stigma ; ?-, reservoir ; c.-v.^ contractile vacuoles ; ckr^ chromatophors ; 

 am^ pyrenoids with sheaths of paramylum. B, another specimen, 

 showing change of shape and diagonal striation of the cuticle. 

 C and /?, outlines to show various stages of contraction. E^ a free 

 swimming specimen undergoing longitudinal division. F and G, 

 division of an engf^^jjdj^^ ^-D^^m^X ; E-G, after Stein.) 



