222 



X. M. STEVENS. 



19 



21 



23 



24 26 



FIGS. 13-14. Telophascs showing the supernumeraries divided (13) or un- 

 divided (1-4). 



FIGS. 15-18. Spermated nuclei showing variations as to presence or absence of 

 X and the two supernumeraries. 



FIGS. 19-20. Anaphases showing unusual position of X. 



