PLATE II 



Smear preparation of pollen grains in Paris qiiadrifolia {n == lo), 

 showing the first mitosis from prophase to telophase. Note the 

 gradual disappearance of relic spirals during prophase. Fixation, La 

 Cour's 2B.E. ; staining, Newton's iodine-gentian-violet. x ca. 600. 

 (La Cour, unpublished.) 



