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In the latter type, at the first maturation division, the sister diads are separated from one another, an “equating” division thus taking place.

The second maturation division is seen in metaphase in figure 220 and in anaphase in figure 221.

Figure 223 is the equatorial plate of the first maturation division of the winter egg, showing the same form and size relations of the chromosomes as in the spermatocyte divisions.

It becomes separated from the other chromatin in the tetrad-stage, remains nucleolus-like in form, and later appears in the first maturation division either among the chromosomes or in a more or less aberrant position.

Prophase of second maturation division, fig.