30 BONES OF THE FACE. 



infra-orbital groove leading to the foramen of that name. The in- 

 ternal or nasal surface has a large opening of the antrum High- 

 morianufii^^ which is a pyramidal cavity with thin walls ; the walls 

 are grooved, indicating the passage of the dental nerves. The open- 

 ing is diminished by the articulation of the palate, inferior turbinate, 

 and unguiform bone to a small orifice which opens into the middle 

 meatus of the nose. 



The nasal jjrocess* arises from the superior and anterior part of 

 the bone. It is broad and thin below; externally it gives origin to the 

 levator labii superioris alseque nasi muscle, internally is a transverse 

 ridge for the inferior turbinated bone. The anterior edge articulates 

 with the nasal bone, the superior with the frontal, and the posterior 

 edge has a deep groove, which is converted into a bony canal by the 

 articulation of the os unguis, to contain the lachrymal sac.^ 



The tnalar process is a rough process upon the external and supe- 

 rior part of the bone for articulation with the malar bone. 



The alveolar process contains the sockets for eight teeth which are 

 larger behind. The anterior nasal spine is best seen when the bone 

 is articulated with its fellow ; immediately behind this is ihe foramen 

 incisivum for the naso-palatine nerve and ganglion. 



The palate p)rocess'^ is the horizontal roof of the mouth and floor 

 of the nose ; uniting behind with the horizontal part of the palate 

 bone,^" and on the side with its fellow, from which latter junction or 

 suture there arises the nasal crista, for, the articulation of the vomer. 

 The anterior extremity^ is the anterior nasal spine. 



PALATE BONE. 



Situated on each side between the superior maxillary and the 

 sphenoid bone; the figure is irregular and consists of three parts. 



The horizontal part^ is quadrilateral in its shape and assists in 

 forming the floor of the nostril and roof of the mouth. The suture 

 between it and its fellow forms a part of the nasal crista for the arti- 

 culation of the vomer, and posteriorly is elongated into the posterior 

 nasal spine ; from which arises the azygos uvulae muscle. 



The ascending or vertical portion^ is divided in its internal or 

 nasal face bv a ridge, ^ for the articulation of 

 '"' ■ the inferior turbinated bone ; externally it has 



a rough articular surface for the maxillary 

 bone ; upon this surface is a groove, converted 

 into the posterior palatine foramen or canal by 

 this articulation, which transmits the palatine 

 nerve and artery. Posteriorly there is an 

 elongated triangular process called pterygoid^ 

 this process has three grooves, the middle of 

 which forms a part of the pterygoid fossa, and 

 those on each side receive the external"' and 

 internal 1' plates of the pterygoid process. 



