CHROMOSOMES OF THE CERCOPID.E. 



313 



the late (Fig. 3) spireme stages. The reduced number of chro- 

 mosomes is 15 in the first spermatocytes, one of which is larger 

 than the others (Fig. 4). The odd chromosome is univalent 



6 



8 



9 



10 



11 



12 



14 



15 



16 



17 



- 5) an d does not divide in the first spermatocyte division 

 (Fig. 6). The second spermatocytes have partly 15 (Fig. 7) 



