56 



BOXES OF THE HEAD. 



hyoid lio-aments. They continue for a long time movable, as the 

 cartilage^ which connects them remains unossified till an advanced 

 period of life. 



THE SKULL AS A WHOLE. 



THE SUTURES. 



With the exception of the lower jaw, which is articulated movably 

 with the temporal bone, all the bones of the skull are closely fitted 

 together by more or less uneven edges or surfaces. To those articula- 

 tions which arc markedly serrated the name of sufure is given. 



The sutures of the skull are best named from the bones between 

 which they lie, as, for example, occipito-parietal, occipito-mastoid, 

 fronto-ethmoid, parieto-sphenoid, &c. The arch of the skull is inter- 

 Fig. 49. — Front View of 

 Male Skull at about 

 TwENTi- Years. (A. T. ) h 



1, frontal eminence ; 2, 

 glabella, between the super- 

 ciliary eminences, and above 

 the transverse suture of 

 union with the nasal and 

 superior maxillary bones ; 

 3, supra-orbital ridge near 

 the supra-orbital notch ; 4, 

 in the orbit on the orbital 

 plate of the splienoid bone, 

 between the foramen lacer um 

 orbitale and the spheno- 

 ma.xillary fissure ; 5, the 

 anterior opening of the 

 nares, within which are seen 

 in shadow the nasal crest of 

 the superior maxillary bones, 

 the vertical plate of the eth- 

 moid bone, and on each side 

 the turbinated bones ; 6, 

 superior maxillary bone at 

 the canine fossa — above the 

 figui-e is the infra-orbital 

 foramen ; 7, mp-tiform, or 

 incisor fos.sa ; 8, malar bone ; 

 9, symphysis mcnti and 

 median ridge ; 10, body of 

 the lower jaw, above the 

 outer oblique ridge and tlie 

 mental foramen ; 11, vertex, 

 near the coronal suture; 12, 

 temjioral fossa ; 13, zygoma ; 

 14, mastoid process ; 15, 

 angle of the jaw ; 16, mental 



angle. In this skull there are fourteen teeth in each jaw, the wisdom teeth having not 



yet appeared. 



sected superiorly by three great serrated sutures, two of which, placed 

 transversely, correspond to the anterior and posterior margins of the 

 parietal bones, while the third passes between them in the middle line. 

 On each side also an irregular longitudinal line of suture runs from the 



