SUBCLAVIAN, AND ITS BRANCHES. 207 



along the gums, near the buccinator, and gives ramifications to 

 them and to the contiguous muscles. 



9. The Arteria Infra-orbitalis comes from the internal maxil- 

 lary, at the upper part of the pterygo-maxillary fossa; it sends 

 some inconsiderable ramifications to the fat and the periosteum 

 of the orbit, through the spheno-maxillary fissure. It then en- 

 ters the infra-orbitary canal, and passes through it with the in- 

 fra-orbitary nerve. On arriving near the anterior orifice of the 

 canal, it detaches downwards a branch which goes to the ca- 

 nine and the incisor teeth, and to the lining membrane of the 

 antrum. It then gets to the face below the origin of the leva- 

 tor labii superioris muscle, and is distributed upon the muscles 

 in front of the upper maxilla, anastomosing with the facial and 

 with the ophthalmic artery. 



10. The Arteria Palatina Superior descends through the pos- 

 terior palatine canal, and, having reached the mouth, leaves 

 some ramifications with the soft palate: it then advances be- 

 tween the bones and the lining membrane of the roof of the 

 mouth, and disperses itself in several small twigs ; one of which 

 passes through the foramen incisivum into the nostril. 



11. The Arteria Pharyngea Superior is sometimes a branch 

 of the last, and is spent upon that portion of the pharynx bor- - 

 dering on the pterygoid processes* 



12. The Arteria Spheno-Palatina is the terminating trunk of 

 the internal maxillary; it enters the nose through the spheno- 

 palatine foramen, and divides into two branches, which are 

 minutely distributed over the Schneiderian membrane. One 

 of them descends along the septum narium; the other along the 

 external margin of the posterior naris, and divides into two 

 principal ramuscles, one of which is dispersed along the mid- 

 dle turbinated, and the other along the inferior turbinated bone. 



SECT. III. OF THE SUBCLAVIAN ARTERY, AND ITS BRANCHES. 



The Subclavian Artery (Arteria Subclavia) of the right side 

 having arisen from the innominata, and that of the left from the 



