PLATE 13 



EXPLANATION OF FIGURES 



70 to 75 Stenoto»ius chrysops 9 X Ctenolahrus adsjjersus cf . 



70 Anaphase of the third cleavage in two sections. Slight lagging. 



71 Anaphase of the third cleavage showing unequal distribution and frag- 

 mentation of chromosomes. 



72 Section through a blastoderm killed five and one-half hours after fertiliza- 

 tion. Magnification not recorded. 



73, A and B Shows abnormal mitoses occurring in cells of blastoderms belong- 

 ing to the same lot as that shown in figure 72. X 810. 



74 Portion of a section through a blastoderm showing the character of the 

 resting cells. 



75 Intercellular masses which resemble nuclei more than cytoplasm in the 

 coarser and more chromatic nature of the granulations which the}' contain. 



288 



