In covering the surface of a wound epithelium does not bridge any gap in continuity but lines every crevice of the defect. . . . In our investigations of the healing of cataract incisions in monkeys, we have seen similar epithelial spread along silk corneoscleral sutures. In many instances the growth is so rapid that the entire suture track becomes lined by cells in 2 to 4 days, which is before fibroblasts are present in good number along the wound lips. Such epithelial cords usually lose their continuity with surface epithelium, and clumps of these cells may remain isolated in the stroma.