I indicated an indentation beside the sagittal suture at the top of the vault.

The course of the sagittal suture is grooved, and above the angle of the occipital bone the parietals are depressed.

The transverse arc from one auditory foramen to the other across the middle of the sagittal suture measures about 13 inches.

The sagittal suture itself is 5.5 inches long.

Cells derived from the fusing posterofrontal suture do this to a significantly greater degree than cells from the patent sagittal suture.