66-67. Metaphase of first maturation spindle, showing element x in different positions.
68. Late anaphase of same.
69-70. Equatorial plate of first maturation spindle, 23 chromosomes and element x below, in fig. 69.
71. Chromatin massed at poles of spindle; element x isolated at one pole.
72-73. Two resting spermatocytes of the second order, one containing element x, the other not.
74-76. Successive stages of breaking down of element x.
77. Prophase of second division; dyads evident, but no sign of x in this or following stages.
78. Second spermatocyte division—metakinesis.
