32 STUDIES IN COMPAEATIVE ANATOMY. 



origin of the posterior belly of the occipito-frontalis. This muscle 

 was not met with in our dissection. 



Not in C. and L. 



Zygomatico-labialis arises from the zygoma, and runs parallel 

 with the upper border of platysma, partly blending with it, to 

 the angle of the mouth. 



Not in C. and L. 



Orbicularis oris forms a tolerably distinct bundle, which passes 

 from the middle line of the lower lip, where it joins the corre- 

 sponding muscle of the opposite side, to the angle of the mouth. 

 Here it is partly blended with fibres of platysma and zygomatico- 

 labialis. The muscle is continued forwards along the margin of the 

 upper lip,becoming stronger and well-defined as it passes the socket 

 of the tusk, beyond which it is united with levator proboscidis. 



C. and L. — 274-5 (/) ; not in the index. 



Levator labii swperioris arises immediately below the origin of 

 orbicularis palpebrarum, slightly overlying the origin of levator 

 proboscidis. It passes almost directly downwards, and blends 

 with orbicularis oris. Dr Watson gives a similar origin to this 

 muscle, but describes an anterior portion as inserted into the lip; 

 while a posterior, weaker bundle is inserted into the facial apo- 

 neurosis beneath the eye. 



C. and L.— 274-5 (not lettered); 276-7 {i\ "grand zygo- 

 matique." 



Levator anguli oris consists of about six fasciculi, which arise 

 from the maxilla, below and internal to the infra-orbital foramen. 

 It passes thence backwards and downwards, and ends by inter- 

 lacing with orbicularis oris and platysma. 



Not in C. and L. 



Orbicularis palpebrarum. — This muscle is considerably more 

 developed below the aperture of the eye than above. It arises 

 from a tubercle upon the inner margin of the orbit. The fibres 

 pass downwards and outwards, spreading out into a semicircle 

 below the eye. The lower fibres extend over the zygomatic 

 process of the maxilla, becoming indistinct towards the outer 

 side of the orbit, and finally losing themselves in the fascia. 

 Dr Watson describes a more elaborate arrangement of the fibres 

 than we were able to distinguish in our example. 



C. and L.— 274-5 {d). 



