THE CRANIUM. 



55 



Skull, 22 bones <( 



Occipital. 

 Two Parietal. 



, Frontal. 

 Cranium, 8 bones . 1 TwQ Temporal . 



, 14 bones 



IJL TTAJ _L GUI 

 Sphenoid. 

 I Ethmoid. 

 " Two Nasal. 

 Two Superior Maxillary. 

 Two Lachrymal. 

 , Two Malar. 

 ' Two Palate. 



Two Inferior Turbinated. 



Vomer. 



Inferior Maxillary. 



The Hyoid Bone, situated at the root of the tongue and attached to the hase 

 of the skull by ligaments, has also to be considered in this section. 



THE CRANIUM. 

 The Occipital Bone. 

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



fora 



FIG. 23. Occipital bone. Outer surface. 



and base of the cranium, is trapezoid in shape and is much curved on itself 

 (Fig. 23). It presents at its front and lower part a large oval aperture, the 

 foramen magnum, by which the cranial cavity communicates with the spinal canal. 

 The portion of bone behind this opening is flat and expanded and forms the 

 tabula; the portion in front is a thick, elongated mass of bone, the basilar 

 process ; while on either side of the foramen are situated processes bearing the 



