302 SPECIAL ANATOMY. 



trachelomast., complex., biventer cervicis, cucullaris), and in the deeper (mm. 

 recti and obliqui). 



b. Art. stylomastoidea (s. Art . auricular, post.) 



c. Art. meningea posterior 8. mastoidea, enters through foram. mastoideum 

 (or/, occipitale) for the posterior part of the dura mater. 



d. Sam. parietalis frequently, enters through for. parietales to sin. longi- 

 tud. superior. The two ascending terminal branches reach as far forward as 

 the vertex, and are situated between galea aponeurotica and the skin. 



5. Auricularis posterior, the posterior auricular artery, supplies the external 

 and internal ear, the Parotis, narrower than four, arises sometimes in common 

 with it or from it, generally one inch high above it. Course : upwards, in 

 the direction of and external to proc. styloid. at first behind and between m. 

 digastric, and parotis; then covered by retrahenles auriculae, and divides at 

 the anterior border of proc. mastoideus into two branches, ram. mastoideus and 

 auricularis. 



Collateral branches : a. Ramimusculares for sterno-cleidom., digastric., sty- 

 lo-hyoideus and glossus. 



b. E. glandulares for the Parotis. 



c. Art. stylo-mastoidea, enters into the stylo-mastoid foramen, traverses 

 the canalis Fallopice, meets with a branch of Art. mening. media anastomosing 

 at hiatus can. Fallop., gives branches to : cellulae mastoid., Tympanum (Art. 

 tympanica superior), Memb. tympani (forming on this with a branch of Art. 

 temporalis the plexus tympanicus), and to the cochlea (through fenestra ro- 

 tunda). 



Terminal branches. 



d. Eamus occipitalis s. mastoideus ascends backwards beneath the skin, 

 passes with a horizontal branch inwards along the superior border of m. sterno- 

 cleidom. and splenius; with an ascending to the external border of m. occipitalis 

 as far as the vertex ; supplies mm. retrahentes and skin ; anastomoses with 

 art. temporal, and occipitalis. 



e. Earn, auricularis s. anterior, passes upon the posterior surface of the ex- 

 ternal ear, with a superior and an inferior branch ; the last supplies the lobule 

 of the ear, passes in the groove between helix and anthelix, as it perforates 

 the concha. 



6. Pharyngea adscendens, the ascending pharyngeal artery the smallest 

 branch ofcarotis externa. Or: from the posterior side of the carot. externa, 

 close above the place of division of carot. communis; or, on a plane with A. 

 lingual. Course and position: vertically upwards, at first between carotis 

 externa and interna, then behind the last in the triangular space between pha- 

 rynx and m. pterygoideus internus; divides into two branches, art. meningea 

 post, and ram. pharyngeus. Collateral branches : ram. pharyngeus inferior, 

 which passes transversely inwards, in ascending and descending branches, and 

 anastomoses with a. thyreoid inferior. 



