205-206. Daughter plates of a similar spindle, showing small chromosome in each; three of the large chromosomes missing in 206.
207. Equatorial plate of a dividing cell of follicle of a young egg, showing 20 large chromosomes.
208. Prophase of mitosis in a young oögonium, showing 20 large chromosomes in two sections, a and b.
Plate VII.
Aphis oenotherae.
Fig. 209. Spermatogonium.
210-211. Spermatogonia in prophase of mitosis.
212. Young spermatocyte of first order.