Plate XXVI 
Figs. 37-38. Anaphases of primary spermatocytes, showing separation of xx 
and y. In figure 37, the hexad is in linear arrangement; in figure 38, the two 
x-chromosomes are placed side by side and the y-chromosoms is above. 
Fig. 39. Late Anaphase of primary spermatocyte, the xx-element passing to 
the upper pole in the figure. 
Figs. 40-41. Sister anaphase plates of cell corresponding to figure 39. In 
figure 40, the y-element is included; in figure 41, we see the xx-element. 
Fig. 42. Interkinesis. 
Fig. 43. Metaphase secondary spermatocyte, lateral view. 
Fig. 44. Metaphase secondary spermatocyte, polar view, showing 13 chro- 
mosomes. 
Fig. 45. Metaphase secondary spermatocyte, polar view showing 12 chromo- 
somes. 
Fig. 46. Sister cells, secondary spermatocytes, metaphase, polar view^: one 
showing 12, the other 13 chromosomes. 
Fig. 47. Same stage as figure 46, but taken from a smear slide. 
Figs. 48-49. Giant secondary spermatocytes, metaphase, polar view, showing 
25 chromosomes 
Figs. 50-51. Sister anaphase plates of a secondary spermatocyte (12 chromo- 
some type), showing exact distribution of chromatin to spermatids. 
Fig. 52. Spermatid, shortly after second meiotic division. 
