140 SKELETON. 



the nerve of the molar teeth to their roots, and a similar canal is 

 seen in front of the antrum, for the nerves of the front teeth. 

 The nerves, in both instances, come from the infra orbitary. 

 The nerves, till they begin to divide into filaments, are between 

 the lining membrane and the antrum, but afterwards they make 

 complete canals in the alveolar processes. The antrum fre- 

 quently communicates with the frontal sinus, through the ante- 

 rior ethmoidal cells, which circumstance is omitted by most 

 anatomists. 



This bone is articulated with the frontal, nasal, unguiform, 

 malar, and. ethmoid, above; to the palate bone behind; to its 

 fellow, and to the vomer, at its middle; and to the inferior 

 spongy bone by its nasal surface. 



2. Palate Bones, (Ossa Palati, Palatins.) 



The palate bones, two in number, are placed at the back 

 part of the superior maxillary, between them and the pterygoid 

 processes of the sphenoid. 



For descriptive purposes they may be divided into three 

 portions the horizontal or palate plate, the vertical or nasal 

 plate, and the orbitar or oblique plate, placed at the upper ex- 

 tremity of the latter. 



The palate plate is in the same line with the palate process 

 of the superior maxillary bone, and supplies the deficiency 

 caused by its abrupt termination. It is square. The inferior 

 surface is flat, but rough for the attachment of the lining mem- 

 brane of the mouth. The superior surface is concave, and 

 forms about one-third of the bottom of the nose. The anterior 

 margin is serrated where it articulates with the palate process 

 of the maxillare superius. The posterior margin is thin and 

 crescentic. The internal extremity of the crescent is elon- 

 gated into a point, from which arises the azygos uvulae muscle. 

 The internal margin of the palate plate is thick and serrated 

 for articulating with its fellow, the upper edge of it being turn- 

 ed upwards to join the vomer. The exterior edge touches the 

 internal side of the maxillare superius, and from it arises the 

 nasal plate. 



