1. The reconstruction of daughter nuclei in Solanum tuberosum, Lycopersicon esculentum, and Allium cepa is by the vesiculation of contiguous chromosomes.

2. The integrity of the chromosomal vesicles is maintained during interkinesis, and a prophase chromosome is formed in each vesicle before its walls disappear.

3. The anaphasic and telophasic alveolization consists in the imbibition of achromatic globules which become the disperse phase of the nuclear system.

4. The reticulum is considered to be a single substance, chromatin. The variation in staining reaction is probably due to physical dispersion.

5. A plasmosome is merely an achromatized chromatin nucleolus. The nucleolus is derived from chromosomes.

6. It is suggested that chromosome vesiculation is probably the universal method of nuclear reconstruction, and also that the vesicles probably maintain their integrity throughout interkinesis.

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