238 THE ARTISTIC ANATOMY OF ANIMALS 



The peculiarities of this muscle in different animals are 

 the following : 



In the dog and the cat it arises behind the infra-orbital 

 foramen. 



In the pig it arises from a depression below the orbital 

 cavity, and its fleshy body is terminated in front by a strong 

 tendon in the upper part of the snout, in which it divides 

 into fasciculi. 



In the ox it arises from the maxillary spine. 



In the horse it arises below the orbital cavity ; then, after 

 having crossed the superficial elevator, it ends in a tendinous 

 expansion, situated in the median hne between the nasal 

 fossae. This expansion divides into fasciculi, which end in 

 the thickness of the upper lip. 



By the contraction of this muscle, the hp is raised, on one 

 side only, if a single muscle contracts, or in its whole extent, 

 if the two muscles act simultaneously. 



Internal Elevator (or Superficial) of the Upper Lip 

 and the Wing of the Nose {levator lahii superioris alceque 

 nasi) (Fig. 90, 6 ; Figs. 91, 92). — This is the muscle veteri- 

 narians designate the supranaso-labial. 



Arising from the frontal and nasal bones, it thence passes 

 towards the upper lip, where it is inserted as well as into 

 the wing of the nose. 



In the ox it is united above with the frontal muscle, and 

 below is divided into two fasciculi, between which pass the 

 elevator described above and the canine muscle. 



In the horse it is also divided into two fascicuh ; but 

 the arrangement is the opposite as regards, their relations 

 with neighbouring muscles, in this animal and in the 

 preceding. 



In the ox the external fasciculus is covered by the external 

 elevator and the canine, which pass under the internal 

 fasciculus ; in the horse the deep elevator passes under the 

 two fasciculi, and the canine passes under the external 

 bundle, and afterwards covers the internal. 



In the pig, the internal elevator is wanting. 



As its name indicates, it raises the upper lip and the wing 

 of the nose. 



