58 THE SKELETON OF THE HORSE 
part. The line of junction of the two parietal bones is marked internally by the 
internal parietal crest (Crista parietalis interna). 
The lateral border is beveled and is overlapped by the squamous temporal 
Fie. 35.—Ricur ParteraL Bone or New-Born Foar; Dorso-LaTeraL VIEW. 
1, Junction with opposite bone; 2, junction with interparietal; 3, junction with occipital; 4, junction with squamous 
temporal; 5, junction with frontal, 
bone, forming the squamous suture (Sutura squamosa). The angle of junction of 
the lateral and posterior borders articulates with the posterior angle of the temporal 
wing of the sphenoid. 
Development.—Each parietal bone ossifies in membrane from a single center. 
1 2 
6 
Fic. 36.—Ricut Parterar Bone or NEw-BorRN Foat, CEREBRAL SURFACE. 
1, Junction with opposite bone; 2, junction with interparietal; 3, junction with occipital; 4, junction with squamous 
temporal; 5, junction with frontal; 6, edge which concurs with temporal bone in formation of temporal canal. 
In the young foal the central part of the bone is more convex than in the adult and 
forms a prominence similar to the pronounced tuber parietale of the young child; 
the external parietal crest is not present, and the external surface is smooth. The 
