MUSCLES OF THE FACE 



345 



The buccinator shows no marked variation, but its superficial layer is well 

 developed. 



The dilatator naris lateralis arises in front of the facial tuberosity, passes for- 

 ward between the branches of the levator nasolabialis, and terminates in the lat- 

 eral wing of the nostril. 



The dilatator naris apicalis is situated in the muzzle and joins its fellow at a 

 median raphe. It arises on the border and upper surface of the body of the pre- 



FiG. 301. — Muscles of Head of Ox; Dorsal View. 

 a, a', Levator labii superioris proprius; 5, levator nasolabialis; /, dilatator naris lateralis; g' , malaris; o, zygo- 

 matico-auricularis and scutulo-auricularis superficiaiis inferior; o", scutulo-auricularis superficialis superior; o"', 

 scutulo-auricularis superficialis accessorius; p, scutularis; u, frontalis: z, orbicularis oculi; 1, concave surface of 

 concha; 3, 2, anterior and posterior borders of concha; 5, scutiform cartilage; 34-, parietal cartilage; 39, facial vein; 

 49, muzzle; 58, medial palpebral ligament. (After EUenberger-Baum, Anat. fiir Kiinstler.) 



maxilla, the fibers passing obliquely upward and outward to the medial wing of the 

 nostril. 



The dorsal part of the lateralis nasi arises from the alar cartilage of the nostril 

 and ends in the medial wing of the nostril. 



The ventral part of the lateralis nasi consists of two layers which arise on the 

 nasal process of the premaxilla and the lateral nasal cartilage and end in the lateral 

 wing of the nostril. 



The orbicularis oculi is well developed. 



The corrugator supercilii is not present as a separate muscle, its place and 

 function being taken by the frontalis. 



The malaris is broad, and spreads out below on the fascia over the buccinator 

 and masseter; it is divided into two parts. 



