102 THE MUSCLES. 



of the orbicularis oris (z), from both the upper and the lower 

 lip. They pass thence dorsocaudad across the zygomatic arch 

 as a band 8 or 10 millimeters wide which is attached to a 



FIG. 64. SUPERFICIAL MUSCLES ON THE LATERAL SURFACE OF THE HEAD 



AND NECK. 



a, a', a", M. platysma; l>, M. depressor conchoe; c, M. submentalis; d, M. zygo- 

 maticus (b, f, and d lie beneath the platysma and are seen through it); e, M. zygo- 

 maticus minor; f, M. caninus; f, g, parts of M. quadratus labii superioris (f, 

 angular head; g, M. levator labii superioris alseque nasi); /i, M. myrtiformis ; ?', M. 

 orbicularis oris; /, M. corrugator supercilii medialis; /', M. corrugator supercilii 

 lateralis; /, M. adductor auris superior; HI, M. helicis; n, M. antitragicus ; o, M. 

 adductor auris inferior; p. M. conchseus externus; y, M. abductor auris longus; r, 

 parts of M. auricularis externus; s, M. orbicularis oculi. 



tendinous aponeurosis lying just craniad of the external opening 

 of the ear. To this aponeurosis are attached also, wholly or 

 partly, the corrugator supercilii lateralis (k) and the submenta- 



