114 



THE MUSCLES. 



M. mylohyoideus (Fig. 65, c). — The mylohyoid is a Lirge 

 thin muscle seen after the reflection of the digastric, filling with 

 its fellow of the opposite side the whole angle between the rami 

 of the lower jaw. Its fibres are transverse. 



Origin from the middle of the medial surface of the body 



Fig. 67. — Muscles ov Tongue, IIyoid Rone, and Pharynx. 



a, M. tragicus lateralis; /', M. jugulohyoideus; c, M. jiteiygoideus externus; </, 

 partially cut surface of M. pterygoideus interims; t\ M. styloglossus; f, M. genio- 

 glossus; g, M. gcniohyoideus; h. M. liyoglossus; ?', M. glossopliaryngeus; /, M. 

 constrictor pliaryngis medius; k^ M. constrictor pliaryngis inferior; /, M. stylo- 

 pharyngeus; w, M. slernohyoideus (cut); «, M. cricotliyreoideus; o, M. sterno- 

 thyreoideus (cut); /, M. tliyreohyoideus. I, niandilile; l', angular jirocess of 

 mandible; 2, stylomandibular ligament; 3, bulla tympani; 4, trachea; 5, oesophagus; 

 6, thyroid gland; 7, isthmus of the thyroid gland. 



of the mandible between the caudal opening of the mandibular 

 canal and the symphysis of the jaw. 



Inscrlion with the opposite muscle into a median raphe 

 which extends from the sj'mphysis of the jaw to the hyoid bone 

 and is closely united to the external surface of the geniohyoid. 

 Some of the fibres gain insertion into the body of the hyoid 



