106 EQUINE ANATOMY. 



Anterior auricular. — -liunning behind the temporo- 

 maxillary joint beneath the parotid, to reach the cro- 

 taphite muscle, and after giving glandular, auricu- 

 lar and mus(;ulai: branches tern>inate&r/; — J ^ 



SuB-zYGOMATic. — 1 asscs outwards between the an- 

 terior border of the parotid and the posterior border 

 of the maxillary bone with the facial nerve, and divides 

 into the transversal artery of the face, which rims hor- 

 izontally on the superior border of the external masse- 

 ter and ramifies in it, and into the masseteric, going to 

 the same muscle. , • _ , >^ -^^ fe, , , ^uoAAytUy 



Internal maxillary. — Running to tlie subsphenoi- 

 dal canal, it passes through to the orbital hiatus and 

 arriving at the maxillary opening dips into the pala- 

 tine canal as the palato-labial. Collateral branches : 

 1 — inferior dental, traverses the inferior maxillo 

 dental canal to end at the mental foramen in two small 

 twigs, one external anastomosing with the inferior 

 coronary, one deep to the roots of the incisive teeth 

 and tusk. It sends collateral branches to the molar 

 teeth and muscles of the masseteric regions ; 2 — ptery- 

 goid, going to the pterygoid and peristaphileus muBcles ; 



3 tympanic, 'to the tympanum with branches to the 



guttural pouches; 4 — spheno-spinal, enters the temporo- 

 parietal canal to anastomose with the mastoid artery 

 /C^lLdlSp^ the occipital ; 5 — posterior deep temporal, to the 



