92 EQUINE ANATOMY. 



Branches. 



A few to the guttural pouch and parotid gland. 



1. Glosso-jacial or external maxillary. 



Passes downward, forward and upward, outside of lower jaw 

 in front of masseter, where it divides, above the maxillary spine, 

 into an ascending branch to the nasal muscles, and a descending 

 branch to the nasal openings. 



Branches. 



Pharyngeal, to soft palate and pharynx. 



Lingual, to tongue. 



Sublingual, to sublingual gland, fraenum linguae, and buccal 

 mucous membrane. 



Inferior labial or coronary, to structures of lower lip, anasto- 

 mosing with opposite. 



Superior labial, to upper lip and nose. 



2. Maxillo-muscular. 



To pterygoid and masseter muscles. 



3. Posterior auricular. 



To external ear, to parotid and middle ear by stylo-mastoid 

 foramen. 



4. Superficial temporal. 



Passes upward a short distance and divides into the anterior 

 auricular and sub-zygomatic. The former supplies the external 

 ear, parotid gland and temporal muscle; the latter passes across 

 face, forming the transverse facial, and ends in the masseter muscle. 



5. Internal maxillary. 



Passes inward along the outer side of the guttural pouch, enters 

 the sub-sphenoidal foramen, and orbital hiatus, passes through 

 maxillary hiatus to the palatine canal, where it terminates in the 

 palato-labial. 



In the first or buccal part it gives off its first five branches, in 

 its second or sphenoidal part two, and four from its third or infra- 

 orbital part. 



Branches. 



1. Inferior dental, through inferior dental canal to lower jaw 

 and teeth, giving off mental artery at the foramen. 



2. Pterygoid vessels, to muscle. 



3. Tympanic, through Glasserian fissure to tympanic cavity. 



4. Spheno-spinous, or great meningeal, through anterior lacer- 

 ated foramen to dura mater. 



