PLATE 14 



EXPLANATION OF FIGURES 



(Tettigidea parvipennis) 

 119, 120, 122 First spermatocytes from same animal as figures 104, etc. 



120 Three of the unequal no. 4 tetrads compared. Note uniformity in sizes 

 of deficient and normal no. 4's; also irregularity in position of points of attach- 

 ment. 



121 First spermatocyte, showing relative sizes of chromosomes except no. 

 5, which is lacking, lost in sectioning. 



122 Anaphase of first spermatocyte. 



123 Late anaphase showing lagging sex chromosome. 



124, 127 Second spermatocyte metaphases containing the sex chromosomes. 

 Figure 124 is a mate to figure 125. 



125, 126 Second spermatocytes lacking sex chromosome. 126 is a mate to 

 figure 127. 



306 



