684 BLOOD-VASCULAE SYSTEM OF THE HORSE 



but is in company with the Ungual nerve. It receives tributaries from the tongue 

 and soft palate. 



(2) The inferior alveolar or dental vein (V. alveolaris mandibulse) is a satellite 

 of the corresponding artery. It often unites with the preceding. 



(3) The middle meningeal vein (V. meningea media) emerges through the 

 foramen lacerum anterius. 



(4) Pterygoid veins (Rami pterygoidei). 



(5) The posterior deep temporal vein (V. temporalis profunda aboralis) is a 



Fig. 5SG. — Veins of Head of Horse. 

 Parts of the superficial muscles and the ramus of the mandible, and all of the masseter muscle except 

 its ventral margin,, have been removed, ^"eins: 1, 5, Jugular; 2, thyroid; 3, internal maxillary; 4' cranio- 

 occipital trunk; 5, ventral cerebral; 6, occipital; 6', muscular branch of 6; G" , cerebrospinal branch of 6; 6'", vein 

 which emerges through foramen of lateralmass of atlas; 6"", vein which emerges through intervertebral foramen of 

 a.xis; 7, great auricular; 7'- 7'"', radicles of 7,' 5, posterior auricular; 5, masseterico-pterygoid; JO, superficial temporal; 

 11, deep auricular; 12, dorsal cerebral; 13, transverse facial and its anastomosis with internal maxillary; 13", pal- 

 pebral radicle of 13; 14, pterj'goid; 15, mandibular alveolar; 16, dorsal lingual; 17, deep temporal; IS, buccinator; 

 19, anastomosis between buccinator and masseteric; SO, anastomosis between buccinator and common labial (21); 2S, 

 S5, inferior and superior labial; ;S.^, angular of mouth ; ^5, ;3.5', external maxillary; .25, facial; 57, lateral nasal; ^5, dor- 

 sal nasal; i?5, angular of ej'e ; SO, reflexa; 5i, trunk of infraorbital and sphenopalatine. Muscles, etc. : a, Orbicularis oris; 

 b, levator nasolabialis; c, dilatator naris lateralis; d, buccalis; e, z\-gomaticus; /, levator labii superioris proprius; g, 

 molaris and depressor labii inferioris; i, labial glands; k, m. temporalis; I, m. masseter; m, m. pterygoideus medialis; 

 n, m. parotido-auricularis; o, m. pterygoideus lateralis; p, m. sterno-cephalicus; q, m. rectus capitis ventralis major; 

 T, m. omo-hyoideus and sterno-hyoideus; s, parotid gland (dissected away from veins); (, dorsal buccal glands. (After 

 Meckel.) 



large vessel which receives tributaries from the temporalis muscle and emissaries 

 from the temporal canal. It is connected with the dorsal cerebral vein and usually 

 mth the meningeal veins by its frontal branch. The latter drains chiefly the 

 lacrimal gland and passes behind the supraorbital process. 



2. The superficial temporal vein (V. temporalis superficialis}, is the large 

 satellite of the corresponding asterj. It is formed by the confluence of the anterior 

 auricular and transverse facial veins. The former is much larger than the cor- 



