viii.] THE MUSCLES. 287 



of the opposite side (in front in the middle line) and the 

 two together form the muscular floor of the mouth. 



The genio-hyoid is narrow, and goes from the hyoid to the 

 mandible inside the symphysis. 



The hyoglossus is a flat muscle, passing from the cornua 

 of the hyoid upwards to the side of the tongue. 



The genio-hyoglossus is a flat, triangular fasciculus, arising 

 inside the symphysis of the mandible, and inserted in a 

 radiating manner from beneath the front of the tongue back- 

 wards to the body of the hyoid. 



FIG. 265. MUSCLES OF THE FRONT AND RIGHT SIDE OF THE NECK. 



i, anterior belly of digastric ; 2, its posterior belly ; 3, mylo-hyoid ; 4, stylo-hyoid ; 

 5, stylo-glossus ; 6, stylo-pharyngeus ; 7, sterno-hyoid ; 8, omo-hyoid ; 9, 

 thyro-hyoid; 10, sterno-thyroid ; ir, anterior scalenus ; 12, middle scalenus 

 the posterior scalenus is seen immediately behind it arising from the second 

 rib ; 13, levator anguli scapulae. 



The sterno-hyoid muscle is a long band which springs from 

 within the sternum or clavicle, and goes to the basi-hyoid. 



The sterno-thyroid (broader and shorter than the pre- 

 ceding) springs from within the sternum and goes to the 

 thyroid cartilage of the larynx. 



The thyro-hyoid appears like a continuation of the last- 

 noticed muscle, and goes from the thyroid cartilage to the 

 great cornua. 



