PLATE 3 
EXPLANATION OF FIGURES 
First spermatocytie division—Continued 
35 to 37. Metaphase plates. 
38 to 40 Metaphase spindles. These may show that the split line of the 
spireme has nothing to do with that of the division of chromosomes. Figures 
39 and 40 illustrate the separation of the X- and Y-chromosomes. 
41 Early anaphase of the division. 
42 Later anaphase. 
Second spermatocytic division 
43 The stage immediately following the anaphase of the first division. Bi- 
partite chromosomes are already visible as such. 
44 A cell just before the metaphase (left) and another in metaphase. 
45 A metaphase spindle, showing equational division of chromosomes. 
46 Metaphase plates with five chromosomes, including the Y. 
47 Ditto, including the X. 
48 Anaphase of the division. 
49 Later anaphase. 
50 to 51 Spermatids. 
