Scientia Sinica

No. 1 MA: FORMATION OF NEW EPIDERMAL CELLS DURING WOUND-HEALING 129

III. A large quantity of nuclear substance was released by the disintegrating tissues, able to develop into nuclei of young cells in the growing epidermis, and further into young cells with cytoplasm and cell membrane.

IV. In addition to epidermal cells, the disintegrating tissues were able to develop into connective tissues.

V. Mitosis took place after the young cells had been formed in the new epidermis, but the number was rather limited.

VI. New epidermal cells chiefly developed from the disintegrating tissues, while a small number of them resulted from mitotic divisions.

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