no ELEMENTS OF MAMMALIAN ANATOMY 



(148) Stylohyoid, stylohyal bone to body of hyoid; elevates 



hyoid. 



(149) Digastric, jugular process of occipital to external 

 coronoid fossa; depressor of lower jaw. 



(150) MyloJiyloid, mandible to median raphe from symphysis 

 to hyoid ; elevates floor of mouth. 



(151) Geniohyoid mandible near symphysis to body of 

 hyoid; draws hyoid forward. 



(152) Jugulohyoid, jugular process to stylohyoid; draws 

 hyoid backward. 



(153) Ceratohyoid cranial horn of hyoid to caudal horn; 

 brings horns of hyoid together to bring body of hyoid forward. 



(154) Masseter, divided into three layers; 



(a) Superficial layer, malar bone to lateral margin of ventral 

 border of mandible. 



(6) Middle layer, ventral border of malar bone to ventral 

 border of external coronoid fossa. 



(c) Deep layer, ventral border of zygoma to external coronoid 

 fossa. Elevator of jaw. 



(155) Temporalis divided into two layers. 



{a) Superficial layer, zygomatic process and temporal fascia 

 to outer surface of coronoid process. 



(b) Deep layer, temporal fossa to inner surface of coronoid 

 process. Elevator of lower jaw. 



(156) Pterygoideus externus (sphenomeniscus of Prentiss), 

 external pterygoid fossa to medial surface of mandible. Eleva- 

 tor of lower jaw. 



(157) Pterygoideus internus, internal pterygoid fossa to 

 mandible; elevator of jaw. 



MUSCLES OF TONGUE 



(158) Styloglossus, mastoid process and adjacent parts to 

 tip of tongue; retracts and raises tongue. 



(159) Genioglossus, symphysis of lower jaw to dorsal part of 

 tongue; draws root of tongue forward and tip backward. 



(160) Hyloglossus, body of hyoid bone to integument of 

 tongue; retracts and depresses tongue. 



