PLATE 4 



EXPLANATION OF FIGURES 



All the figures on this plate are from parthenogenetic eggs. 

 32 and 33 Three-cell stage. 



34 Four-cell stage. 



35 Five-cell stage. 



36 Nine hours after treatment. 



37 Twenty-four hours after treatment. 



38 to 41 Multinucleate stages. 



42 One polar body. Telophase first cleavage. 



43 One polar body. Two-cell stage. 



44 to 47 Abnormal polar divisions. 



47 Three polar bodies. Two-cell stage. 



48 Two polar bodies. Four-cell stage. 

 Magnification, 575 diameters. 



42 



