164 



THE SKELETON. 



Skull, 22 bones < 



Cranium, 8 bones . 



Occipital. 



Two Parietal. 



Frontal. 



Two Temporal. 



Sphenoid. 



Ethmoid. 



Two Nasal. 



Two Superior Maxillary. 



Two Lachrymal. 



Two Malar. 



Two Palate. 



Two Inferior Turbinated. 



Vomer. 



Inferior Maxillary. 



THE CRANIUM. 

 The Occipital Bone. 

 The Occipital Bone (ob, caput, against the head) is situated at the back part 



Face, 14 bones . . < 



SUPERIOR 

 CONSTRICTOR 



>/ Pharynx. 



FIG. 130. Occipital bone. Outer surface. 



and base of the cranium, is trapezoid in form (Fig. 130), curved upon itself, and 

 presents for examination two surfaces, four borders, and four angles. 



The external surface is convex. Midway between the summit of the bone and 

 the posterior margin of the foramen magnum is a prominent tubercle, the external 

 occipital protuberance, for the attachment of the Ligamentum nuchse ; and, 

 descending from it as far as the foramen, a vertical ridge, the external occipital 

 crest. This tubercle and crest vary in prominence in different skulls. Passing 

 outward from the occipital protuberance is a semicircular ridge on each side, the 



