PLATE 5 



EXPLAXATIOX OF FIGURES 



Side views of seven first spermatocyte metaphases, form 'A,' showing varia- 

 tion within the group. 



31 An individual with all of the chromosomes except numbers 1 and 2 either 

 atelomitic or J-shaped. 



32 An early anaphase with fifteen atelomitic dyads. 



32«' Spermatogonia! metaphase with chromosomes arranged in pairs show- 

 ing fifteen atelomitic chromosomes. From same animal as 32. Plate 11, figure 

 32a, is the same complex as drawn under the camera lucida. 



502 



