124 



BOKES OF THE SKULL. 



wall is formed by the malar (6) and a part of the sphenoid 

 bones ; the latter bounds the apex of the orbital cone ; in it 

 are pierced holes for the passsage of the optic and other nerves 

 appertaining to the organ of vision. The orbit contains the 

 muscles that move the eye-ball, and in its upper and outer 

 region, the lachrymal gland. 



Fig. 99. [ 249. The greater 



part of the nose is form- 

 ed by cartilages, so that 

 in the skull the anterior 

 opening of the nasal 

 cavity (fig. 98, 29) is 

 very large, and the 

 osseous portion of the 

 nose formed by the 

 two small nasal bones 

 (fig. 99, 2), makes an 

 inconsiderable promi- 

 nence. The nasal ca- 

 Anterior boundary. Posterior boundary, vitv is divided by a 

 vertical partition into two fossae, as seen in fig. 99, 5 and 28, 

 which shews the posterior boundary of the nose ; superiorly it is 

 hollowed out of the ethmoid bone, the interior of which is 

 full of cells ; and its floor is formed by the superior maxillary. 



Fig. 100. 



Fig. 101, 



[ 250. The 

 superior maxil- 

 lary bones (figs, 

 100 and 101) 

 contain the teeth 

 of the upper jaw; 

 in infancy this 

 bone is compos- 

 ed of several ele- 

 ments, one of 

 which, called the 

 intermaxillary, 

 remains as a per- 

 manently dis- 

 tinct bone in 



monkeys and other quadrupeds, whilst in man it is early sol- 

 dered to the superior maxillary. Fig. 100 shews the internal, 



