88 W. W. SWINGLE. 



PLATE V. 



FIGS. 25 and 26. First maturation divisions showing accessory chromosome at 

 one pole of the cell; single chromosome at opposite pole. 



FIGS. 27 and 28. Second spermatocytes showing the large accessory chromosome. 



FIG. 29. Anaphase of dividing spermatogonium showing division of the chro- 

 matoid body. 



FIG. 30. Spermatocyte of Rana catesbiana with two chromatoid bodies in the 

 cytoplasm. 



FIG. 31. Spermatogonium of Rana pipiens showing large chromatoid body. 



