The first case was a paralytic idiot of thirty-nine, whose cranial development was small in proportion to the size of the face and body; the cranium was oxycephalic; the scalp was lax and redundant and the hair thin; there were 13 furrows, five on each side running anteroposteriorly, and three in the occipital region running transversely. The occipitofrontalis muscle had no action on them.