588 



THE VEINS 



the meningeal veins by its frontal l)ranch. The latter drains chiefly the lacrimal 

 gland and passes behind the supraorbital process. 



2. The superficial temporal vein (V. temporalis superficialis) is a satellite of 

 the corresponding artery. It is formed by the confluence of the anterior auricular 

 and transverse facial veins. The former receives the superior cerebral vein (V. 

 cerebralis dorsalis), which is the emissary of the transverse sinus of the dura mater; 

 it emerges from the parieto-temporal canal behind the postglenoid process. The 

 transverse facial vein (V. transversa faciei) runs at first above the artery of like 

 name, then plunges deeply into the masseter and unites in front with the facial 

 vein. It is connected with the vena reflexa. 



3. The inferior masseteric or maxillo-muscular vein (V. masseterica) joins the 

 jugular at the upper border of the sterno-cephalicus tendon. It is a short trunk 

 formed by the confluence at the posterior border of the jaw of masseteric and 



Fig. 461. — Superficial Vessels and Nerves op Head and Anterior Part of Neck of Horse. 

 a, Masseter; fe, parotid gland; c, parotido-auricularis; i, masseteric artery; .3, parotid branch; 3, transverse 

 facial artery; 4, facial artery; 6, 8, inferior labial artery; 7, superior labial artery; S, lateral nasal artery; 9, in- 

 fraorbital artery; iO dorsal nasal artery; i/, angular artery of eye; i;2, 73, jugular vein; 74, great auricular vein; 

 15, masseteric vein; 16, superficial temporal vein. 17, transverse facial vein; 17', deep temporal vein; IS, external 

 maxillary vein; i9, facial vein; ^0, labial vein; .2J, dorsal nasal vein; S2, lateral nasal vein; ;?3, angular vein of 

 eye; 2^,25, facial nerve; 25', 25", superior and inferior buccal nerves; 26, transverse facial nerve; 27, auriculo- 

 palpebral nerve; 28., anterior auricular nerve; 29, cervical branch of facial nerve; SO, ventral branch of second 

 cervical nerve; 30' , 30", 30'", auricular and cutaneous branches oi 30; 31, branches of dorsal division of first and 

 second cervical nerves; 32, dorsal branch of spinal accessory nerve. (After Leisering's Atlas.) 



pterygoid veins. The former is usually connected by a large Ijranch with the buc- 

 cinator vein. 



4. The great auricular vein (V. auricularis magna) is a satellite of the posterior 

 auricular artery above, ])ut joins the jugular a variable distance below and behind 

 the point of origin of the arteiy. 



5. The inferior cerebral vein (V. cerebralis ventralis) is an emissary of the 

 cavernous sinus of the dura. It is a satellite of the internal carotid artery, receives 

 the condyloid vein, and joins the jugular near the occipital vein or by a common 

 trunk witii it. 



(1 The occipital vein (V. occipitalis) arises in the fossa atlantis by the union of 

 muscular and cerebrospinal branches. The former comes from the muscles of the 

 poll and passes through the foramen transversarium. The latter is connected with 

 the occipital sinus of the dura mater and emerges from the spinal canal by the 

 intervertebral foramen. 



7. The external maxillary or facial vein (V. maxillaris externa) arises by radicles 

 which corresiwnd in general to the branches of the artery of like name. It passes 



