PLATE 7 



EXPLAXATIOX OF FIGURES 



All the figures on thi8 plate are from parthenogenetic eggs. 



66 Anaphase of first cleavage from an egg without polar bodies. 



67 Chromosomes of second cleavage from an egg without polar bodies. 



68 Chromosomes of middle cleavage from an egg without polar bodies. 

 60 Formation of first polar body. 



70 Metaphase, second polar spindle. 



71 Anaphase, second polar spindle. 



72 and 73 Telophase, second polar spindle. 

 Magnification, 2600 diameters. 



48 



