484 Chromosomes of Anasa Tristis and Anax Junius 
Fic. 3. Anax junius. A, B, Late prophases of first division, showing in 
some cases the four paris of the crosses; C, metaphase, first division, showing 
condensed tetrads: D, H, metaphase groups, polar view, showing the 13 
tetrads and the heterotropic (W) in each case; F, beginning anaphase, first 
division, showing complete separation of the parts of the tetrads; G, early 
anaphase group, polar view, showing 13 dyads and the single heterotropic; dH, 
early anaphase, first division; 7, anaphase group, polar view, same stage as 
last; J, K, later anaphases, first division, showing the divided heterotropic 
lagging. 
