47 



tocyte of the first order. 15a is a drawing of the same 

 nucleus made from a lower plain and showing a portion e. of 

 the chromatin which was not included in the equatorial plate. 



Pig. 16. Chromosomes found In the equatorial plate of 

 the first miotic division. 



Figs. 16a and 16h. Portions of the first miotic figure 

 in the metaphase, showing the chromosomes. 



Figs. 17 and 18. Two stages in the anaphase of the 

 first miotsis. 



Figs. 19-22. Show different stages and variations in the 

 early telophase of the first miotic division. Interzonal 

 flhers are shown stretching hetween the masses of chromatin 

 and the mld-hody apparently forming a hand around the flhers. 



Figs. 23-25. The second miotic division: Stages in the 

 formation of the equatorial plate. 



Fig. 26. The metaphase of the second miotic division. 



Fig. 27. Telophase of second miotic division, showing 

 Intersonal flhers and the mid-body. 



Fig. 28. Later telophase. The centrosome is still vis- 

 ible here and is still attached hy flhers to the nucleus. A 

 clear area also surrounds the nucleus. 



gigs. 29-52. Different stages In the formation of a 

 reticulate nucleus in the spermatid. A black granule, the 

 centrosome may be seen and a more or less complete zone free 

 from granules around the nucleus. 



Figs. 55-56. Spermatids with vacuoles in the cytoplasm, 

 c.a. mass of finely granular cytoplasm which may be the mlto- 

 chrondria. 



Fig. 57. Spermatid with vacuole or capsule and nucleus. 

 The periphery of nucleus more densely stained than center. 



Fig. 58 . Spermatid showing a small clear vacuole in the 

 nucleus. 



Figs. 59-42. Later stages in the transformation of the 

 spermatids mt. mitochondrial substance. 



Pig. 45. Spermatid showing two sides of a dark ring, 

 d. in the capsule; mt. mitochondria, also the central body 

 on the nucleus at the bottom of the capsule. 



Fig. 44. Spermatid showing two granules on the border 

 line between the nucleus and capsule. 



