2l6 C. M. CHILD. 



PLATE XII. 



FIGS. 25, 26. The second spermatocytic mitosis. 



FIG. 27. A-D, early stages of fragmentation of nuclei of first spermatocytes. 



FIG. 28. Fragmentation. One small nucleus forming. 



FIG. 29. A-E, the formation of nuclei by fragmentation. 



