102 THE MUSCLES. 
of the orbicularis oris (2), 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 
Fic. 64,—SUPERFICIAL MUSCLES ON THE LATERAL SURFACE OF THE HEAD 
AND NECK, 
a, a', a’, M, platysma; 4, M. depressor conch; c, M. submentalis; ¢, M. zygo- 
maticus (4, c, and @ lie beneath the platysma and are seen through it); e, M. zygo- 
maticus minor; /’, M. caninus; f, g, parts of M. quadratus labii superioris (/, 
angular head; g, M levator labii superioris alzeque nasi); 4, M. myrtiformis; 7, M. 
orbicularis oris; 7, M. corrugator supercilii medialis; 2, M. corrugator -supercilii 
lateralis; 7, M. adductor auris superior; 7, M. helicis; ~, M. antitragicus; 0, M. 
adductor auris inferior; ». M. conchzeus externus; 7, M. abductor auris longus; 7, 
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 (2) and the submenta- 
