ANATOIMY OF THE HORSE. 41 



from this the process curves upwards and outwards, and subse- 

 quently forwards, in the form of an arch, meeting on the outer side 

 of the orbit with the zygomatic process of the malar bone, and 

 articulating with it through the zt/goinatic suture, the two com- 

 pleting tlie zi/goniatic arch, against which abuts the frontal 

 arch. The zygomatic crest and the articular process, the one 

 rising, the other descending, from the temporal part of the arch, 

 are also observable. 



2. The lateral facial region extendsfrom the orbit to 

 the incisive teeth. It is partially and very unequally divided into 

 superior and inferior departments by the zi/gomatic spine; which 

 arises from the infero-external and anterior part of the arch of the 

 same name, reaches forward about one-third of the length of the face 

 (measuring from the orbit), and ends abruptly : the inferior depart- 

 ment is occupied by the masseter, to which the spine gives attach- 

 ment; the superior, by much the most extensive surface, exhibits, 

 a little higher than its middle, the infra-orbital J'oramen ; near the 

 inner angle of the orbit, the lachrymal tubercle ; between the fora- 

 men and the tubercle, a depression, marking the attachment of the 

 nasalis longuslabii superioris; anteriorly, a superjicial hollow, de- 

 noting the place of attachment of the caninus : besides these, 

 various other muscular impressions are perceptible. The sutures 

 displayed upon this surface, are — the lateral nasal, extending 

 from the transverse suture to the lateral opening of the nose, and 

 uniting the nasal to the lachrymal and superior and anterior 

 maxillary bones ; the malar suture, running transversely down- 

 ward and outward from the lateral nasal, and connecting the su- 

 perior maxillary to the lachrymal and malar bones ; the lachrymal 

 suture, extending perpendicularly backward from the malar, and 

 continuing its course within the orbit, uniting the lachrymal and 

 malar bones ; the maxillarij suture, extending obliquely, forward 

 and downward, from the anterior part of the lateral nasal, and 

 joining the superior and anterior maxillary bones. Supero- 

 anteriorly (in relation to this surface^ we perceive oneof the lateral 

 ope)iings of the nose, bounded in front by the nasal peak, behind 

 by the superior or convex border of the anterior maxillary bone. 

 In front of this border, the bone shows the surface for the attach- 

 ment of the depressor labii superioris. From the inferior parts of 

 this region project the molar, canine, and lateral incisive teeth. 



