VOLVOX 



199 



E, isolated sperms of V. aureus (note chloroplast, eyespot and 

 flagella), x 825. F, smaller sperms of V. globator on same 

 scale (chloroplast degenerate). G, egg of V. globator surrounded 

 by sperms, x 400. (After Klein and Cohn.) A-E, V. aureus. 



F, G, V. globator. 



