FIG. 3. V. Rousselelii. 

 A-C, Details of cell structure. 



A, Four cells at the anterior pole. 



B, Cells from region of posterior pole. 



C, Single cell (side view) from equatorial region. 



D, Group of spermatozoids. 



5. =eyespot ; c.v. contractile vacuole ; b.g. = basal granule ; n. = nucleus ; 

 nl =nucleolus; f.v. food vacuole ; j>.=pyrenoid ; g. = glycogen. 

 A-C x 2000 ca. D x 2500. 



