MYOLOGY 



237 



authors as the lachrymal muscle, which does not exist in 

 this state in man, but of which the development is par- 

 ticularly remarkable, as to extent, in the ox, in which it 

 descends as far as the buccinator. 



According to other authors, some of the fibres of this 

 muscle constitute the small zygomatic. 



Fig. qi. — Myology of the Ox : Muscles of the Head. 



1, Masseter ; 2, orbicularis palpebrarum; F, frontalis; 3, zygomaticus 

 major ; 4, lachrymal (this muscle is sometimes described under the 

 name of small zygomatic); 5, levator labii superioris proprius ; 6, 

 levator labii superioris alseque nasi ; 7, levator anguli oris or caninus ; 8, 

 orbicularis oris ; 9, buccinator ; 10, maxillo-labial ; 1 1 , zygomatico-auricu- 

 laris ; 12, external temporo-auricularis ; 14, parotid gland; 15, parotido- 

 auricularis ; 16, inferior maxillary bone. 



Levator Labii Superioris Proprius (Fig. 90, 5 ; Figs. 91, 

 92). — Also named by veterinarians the supramaxillo-lahial, 

 or again, the proper elevator of the upper lip, this muscle 

 arises from the external surface of the superior maxillary 

 bone, passes under the superficial elevator, which we shall 

 study in the succeeding paragraph, and goes to be inserted 

 into the thickness of the lip, to which its name indicates 

 that it belongs. 



