THE MUSCLES OF THE HEAD. 97 
face with the galea aponeurotica (to which the muscle is closely 
united), the epicranius muscle (/) and the temporal muscle (z). 
-(ction.—Draws the two ears dorsad, toward the middle 
line. 
‘Fic. 63.—MuscLes ON THE DorsaL SURFACE OF THE HEAD. 
On the right side are shown the superficial muscles; on the left side the super- 
ficial muscles have mostly been removed, exposing the deeper muscles and the bone. 
a, M. intermedius scutulorum; 6, M. corrugator supercilii medialis; c, M. orbicularis 
oculi; ¢, M, corrugator supercilii lateralis; ¢, cranial end fibres of M. platysma; /, 
M. adductor auris superior; g, g’, M. levator auris longus (g. cranial portion; 2”, 
caudal portion); 2, 2’, M. epicranius (#2, M. occipitalis; 2’ M. frontalis); 2, M. trans- 
versus auricule; #, M. auricularis superior (cut on the left side); ¢, M. abductor 
auris brevis; #, M. abductor auris longus; 2, M. temporalis; 9, cut origin of M. 
frontoscutularis; 2, 2’, M. levator labii superioris aleeque nasi (’, the origin from 
the maxillary'bone); g, angular head of M. quadratus labii superioris. 1, scutiform 
cartilage; 2, external ear; 3, bones of the skull. 
M. corrugator supercilii medialis (4).—This consists of 
a thin sheet of scattered fibres lying craniad of the last and 
intermingling with it. The fibres take origin near the middle 
line, pass laterad, then curve craniad, converging, to be 
