SOCIETY OP THE UNIVERSITY OP ABERDEEN. 137 



Champneys. " On the Muscles and Nerves of a Chimpanzee and 

 Anubis." Journal of Aitatoni// mid Physiology, vol. vi. 



Hepburn. " The Comparative Anatomy of the Muscles and Nerves 

 of the Superior and Inferior Extremities of the Anthropoid 

 Apes." Journal of Anatomy and Phyniolofiy, vol. xxvi. 



Wiedersheim. "Structure of Man." 



Bland-Sutton. " Ligaments," etc. 



MUSCULATURE OF THE FACE. 



Platysma my aides. 



This muscle had a wide distribution on the face. It extended 

 over the chin where it was with difficulty separable from the de- 

 pressor mass of the lower lip to the angle of the mouth, becoming 

 almost continuous with the zygomaticus. Stretching across the face 

 it overlapped the lower three-fourths of the facial surface of the 

 parotid. 



Zygomaticus. 



This muscle was exceedingly well differentiated, forming a flat 

 muscular band inserted into the angle of the mouth along with the 

 other muscles meeting there. 



Orbicularis oculi. 



Consisted of four or five well-marked muscular rings surrounding 

 the orbital margin and sending down expansions to the upper lip, con- 

 stituting a levator anguli oris and part of the levator labii superioris. 

 Corresponding to the position of the pyramidalis nasi was a thin slip 

 of muscle which sent off expansions to the orbicularis oculi, and further 

 to the upper lip and side of nose, forming a levator labii superioris 

 alaeque nasi. Fibres also arose directly from the bone below the in- 

 ferior orbital margin to form part of the levator labii superioris. The 

 l>alpebralis consisted of well-marked muscular rings. 



Frontalis. 



Ill-defined. 



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