MUSCULAR SYSTEM OF THE RED HOWLING MONKEY 67 



to m. genioglossus 



to m. geniohyoideus 



to m. thyreohyoideus 



to m. sternohyoideus 



to m. costothyreoideus 



to m. costothyreoideus 

 to m. sternohyoideus 



to m. sternothyreodeus 



r iGURE 23. — Innervation of ventral trunk muscles in the left side of the neck, male specimen. 



