The frontal bone articulates with the parietal bones above, with the malar bones by the outer extremities of the orbital margins, with the great wing of the sphenoid externally, just beyond the orbital margins.

Fig. 40. - The Frontal Bone.

The Parietal bones are two square-shaped bones, convex outwardly in both diameters. They articulate above with one another, anteriorly with the frontal bone, posteriorly with the occipital bone, and below with the temporal and sphenoid bones.