Studies on Chromosomes. 



379 



In the stage that immediately follows, the chromosomes for a 

 brief period become so crowded that their exact changes cannot be 

 followed. In slightly later prophases of the second division, which 

 follows without a pause, the chromosomes again spread apart, 



a 



^^ ^^m 



* 



* 



m 



n 



o 



FIG. 2. 



Coenus delius. a, b, normal equatorial plates, metaphase of first division; c , abnormal form with nine 

 chromosomes; d, the entire chromosome-group, first division metaphase, in side view, the upper four in 

 their natural position; e, /, anaphases in side view showing in each case the idiochromosomes and three 

 others; g, h, daughter-groups, late anaphase of first division, from the same spindle; i, j, equatorial 

 netaphase of second division, polar view; k, metaphase of second division; /, later metaphate, 

 separation of the idiochromosomes; m, n o, p, two pairs of daughter-groups, late anaphase, second 

 di\ 1'ion, in each case from the same spindle. 



