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origin '!' the pyramidal muscle of the noso, (snpernwxillo-nasalis magnus), 

 and suiiict nirs b, low th:it muscle. It subsequently gains the upper lip, 

 along \\itli the infra-orbital branches of tlio superior maxillary nerve, 

 by passing between the sujicrnusalis-lahialis and the pyramidal muscle of 

 the nost:; it then teriuiuutes in forming an arch by inosculation with the 

 puhito-lubialis artery. 



The branches it gives off pass to the external ala of the nose and the 

 textures of the upper lip. Some are expended in the muscles just nurned, 

 and iu the alveolo-labialis. 



2. Muxillo-muscular Artery. (Fig. 286, 21.) 



The maxillo-muscuhvr artery is a vessel that does not appear to have its 

 representative in Man. It emerges from the external carotid, above the 

 point where it is included between the large branch of the o's hyoides and 

 the stylo-hyoid muscle, h'emarkable for the very obtuse angle it forms at 

 its origin with the principal vessel, it descends behind the posterior border 

 of the inferior maxilla, covered by the parotid gland. It then divides 

 into t\vo brunches : a deep oae, which goes to the internal pterygoid muscle, 

 after furnishing some minuscules to the neighbouring organs ; and a 

 superficial one, which turns round the posterior border of the maxilla, 

 and emerging from beneath the parotid gland, above the insertion of 

 the sterno-maxillaris muscle, plunges into the masseter, and expends itself 

 in the body of that muscle by several branches which anastomose with the 

 divisions of the subzygomatic artery. 



3. Posterior Auricular Artery. (Fig. 286, 22.) 



Third collateral branch of the external carotid, the posterior auricular 



artery arises at a very acute angle above, and a little behind, the preceding 



1. It ascends beneath the parotid gland, behind the base of the concha 



of the ear, crosses the cervico-auricular muscles, and reaches the extremity 



of the cartilage by passing underneath the skin which covers its posterior 



. 



In its course, it emits several ascending auricular branches, which arise 



at dill'- rent elevations and cover the concha with their divisions. Among 



ought to distinguish the first (Fig. 286, 23); this has its origin at 



the temporal trunk, and soon divides into two branches : one, profound, 



sending a very thin filament into the middle car by the stylo-mast did 



fiii-u;iu-n, pa-ses between the external auditory canal and the mostoid 



<s to enter the subeonehal adipose tissue and the internal scuto- 



auricuhir muscle; the other, superficial, imbedded in this parotid tissue, 



priii-cods to the external side of the concha, and buries itself in the interior 



of that cartilage, along with the middle auricular nerve, after abandoning 



si une i xtcrnal rainuseulcs. 



FiMin these auricular branches there also escape a multitude of 

 parottdeal twigs. 



4. ,s'.-y ,y/o.i/ '/'.if/I /-.I/ .1//.-I-// ur Temporal Trunk. (Fig. 286, 25.) 



This is the smallest of the two terminal branches of the external carotid. 



a short ascending course between the parotid gland, the guttural pouch, 



and the m-ck of the maxillary condyle, In-hind which it is situated, 



this artery is divided into two branches : the anh-rlor <f/nV/ar and the 



gubzy</"inii(ii-. 



