684 BLOOD-VASCULAR SYSTEM OF THE HORSE 
but is in company with the lingual nerve. It receives tributaries from the tongue 
and soft palate. 
(2) The inferior alveolar or dental vein (V. alveolaris mandibulz) 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 (VY. temporalis profunda aboralis) is a 
Fig. 586.—VeErINs or Heap or 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. Veins: 1, 3, Jugular; 2, thyroid; 38, internal maxillary; 4, cranio- 
occipital trunk; 4, ventral cerebral; 6, occipital; 6’, muscular branch of 6; 6’, cerebrospinal branch of 6; 6”, vein 
which emerges through foramen of lateral mass of atlas; 6’, vein which emerges through intervertebral foramen of 
axis; 7, great auricular; ?’—?’’”, radicles of 7; 8, posterior auricular; 9, masseterico-pterygoid; 10, superficial temporal; 
11, deep auricular; 12, dorsal cerebral; 13, transverse facial and its anastomosis with internal maxillary; 73”, pal- 
pebral radicle of 13; 14, pterygoid; 15, mandibular alveolar; 16, dorsal lingual; 17, deep temporal; 18, buccinator; 
19, anastomosis between buccinator and masseteric; 20, anastomosis between buccinator and common labial (2/); 22, 
28, inferior and superior labial; 24, angular of mouth; , 25", external maxillary; 26, facial; 27, lateral nasal; 28, dor- 
sal nasal; 29, angular of eve; 30, reflexa; 3/, trunk of infraorbital and sphenopalatine. Muscles, ete.: a, Orbicularis oris; 
b, levator nasolabialis; c, dilatator naris lateralis; d, buccalis; e, zygomaticus; jf, levator labii superioris proprius; g, 
molaris and depressor labii inferioris; 7, labial glands; k, m. temporalis; 7, m. masseter; m, m. pterygoideus medialis; 
n, m. parotido-auricularis; o, m. pterygoideus lateralis; p, m. sterno-cephalicus; g, m. rectus capitis ventralis major; 
r, m. omo-hyoideus and sterno-hyoideus; s, parotid gland (dissected away from veins); ¢, dorsal buccal glands. (After 
Mockel.) 
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 
with 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 artery. It is formed by the confluence of the anterior 
auricular and transverse facial veins. The former is much larger than the cor- 
