320 J. E. WODSEDALEK. 



PLATE IV. 



FIGS. 42, 43, AND 44. Late prophase of division in a secondary spermatocyte 

 which did not receive the accessory chromosome, showing only the nine ordinary 

 chromosomes. Figs. 42 and 43 show also the chromatoid body. 



FIGS. 45 AND 46. Early metaphase of division in a secondary spermatocyte 

 which did not receive the accessory chromosome. Fig. 45 shows the chromatoid 

 body off the spindle. 



FIGS. 47-54. Late anaphase of division in secondary spermatocytes showing 

 various positions of the chromatoid body when it is present. Fig. 47 shows also a 

 small body in addition to the chromatoid body. The cell is one which did not 

 receive the accessory chromosome. In the cell represented in Fig. 50 the chromatoid 

 body was absent and in Fig. 54 two bodies may be seen. 



FIGS. 55 AND 56. Spermatid showing nine bivalent chromosomes which is one 

 of the resulting cells of the division of a secondary spermatocyte which did not 

 receive the accessory chromosome. Fig. 55 shows the chromatoid body. 



FIG. 57. Characteristic massing of the chromosomes just before the nuclear 

 wall of the spermatid is formed. 



