26 U.S. NATIONAL MUSEUM BULLETIN 2 73 



is by fleshy fibers from (1) both oral and nasal surfaces of the so 

 palate near the attachment of this structure to the pterygoid proces 

 (2) the inner surface of the pyramidal mass of the palatine (fig. 5 

 and by a few muscular bundles from (3) the medial end of the auditor 

 tube behind the origin of m. levator veli palatini. It descends into tl 

 pharynx between the pharyngobasilar fascia and the muscular coat < 

 the organ to end by intermingling of its fibers with those of tl 

 expanded portion of the stylopharyngeus (fig. 7) . 



Nerve supply: Could not be determined. 



Function : Elevation of the larynx. 



M. palatoglossus: The arcus palatoglossus contains this not vei 

 prominent muscle. Its fleshy fibers come from the oral surface of tl 

 soft palate and pass downward deep to the mucosa of the isthmi 

 faucium to end on the lateral side of the root of the tongue (fig. 7 



Nerve supply: Could not be determined. 



Function: Closure of the isthmus. 



M. levator veli palatini: It is a smaller muscle than the tensor v( 

 palatini and entirely intrapharyngeal in location. It is shaped lil 

 a transversely compressed pyramid whose apex slants forward ar 

 medially. The base corresponds to the origin of the muscle from tl 

 posteromedial aspect of the auditory tube and adjacent bony surface 

 of the petrous bulla (figs. 4, 5). Its fleshy fibers run down, forwai 

 and medially to the soft palate where they end over the nasal surfai 

 of the palatine aponeurosis. 



Nerve supply: A small branch of the pharyngeal plexus reachi 

 the muscle. 



Function : It elevates the soft palate. 



The intrinsic muscles of the larynx which also belong in the vag 

 accessory group have been extensively dealt with by several invest 

 gators. Starck and Schneider (1960) present an excellent summary ' 

 these structures. Kelemen and Sade (1960) were also concerned wit 

 them in their study made with gross microscopic sections of the laryr 

 in three specimens of Alouatta palliata. There is little which I cou] 

 add at the present to the information afforded by these worker 

 For that reason it has been decided not to include here a descriptic 

 of the intrinsic laryngeal muscles. 



M. sternocleidomastoideus: It is a columnar and somewhat laterall 

 compressed muscle extending from the postotic region of the skull t 

 the clavicle and sternal processes (see Schultz, 1961, for definitic 

 of this term). It arises by short tendinous fibers organized into 

 stout bundle from the highest part of the mastoid region. The mastoi 

 zone is triangular (fig. 9). A crest, to which I shall often refer i 

 postmastoid, corresponds to the dorsal margin. An irregular tran 

 verse ridge divides the zone into an upper and rough area for tl 



