Abstract
The mitotic cycle in Oedogonium was observed with special attention to the behaviour of the nucleolus.
The nucleolus which degradates during metaphase, is reorganized on the equatorial plate of the spindle in late anaphase. The reorganized nucleolar material becomes smaller after the telophase spindle has decreased in size and finally disappears.
Several nucleoli are newly formed in the daughter nucleus in early telophase, and fuse into a spherical shaped body.
The nuclear membrane or spindle membrane is present until late telophase.
Chromosomal behaviour in the division cycle is similar to that of higher plants.
