222 ' N. M. Stevens 



Description of Figures 



Fig. 32 Metaphase group in outline. Ac-c. 

 Fig. 33 Exceptional group of three rings. Ac-c. 



Figs. 34 and 35 Late prophas.; or early metaphase, from sections showing a single chromosome pair. 

 Fig. 36 Anaphase, showing the ends of one pair still overlapping and attached. Ac-c. 

 Figs 37— 41 Exceptional cases of fragmentation and unequal division of the chromosome pair a of 

 Fig. 23. Ac-c. 



Fig. 42 Another case of irregular constriction of the same chromosome. Ac-c. 

 Fig. 43 Pair of second spermatocytes. Ac-c. 



