MANDIBULAR MUSCLES 263 
muscle extending from the paramastoid process of the occipital bone to the posterior 
border of the lower jaw; it is covered by the parotid gland. 
Fic. 265.— MANDIBULAR AND LARYNGEAL REGIONS OF HORSE, AFTER REMOVAL OF SKIN AND CUTANEUS. 
h, buccinator; i, depressor 
c, Brachiocephalicus; d, sterno-cephalicus; e, omo-hyoideus and sterno-hyoideus; 
nylo-hyoideus; 2, posterior, terior, border of external 
labii inferioris; m, masseter; v, occipito-mandibularis 
, angle of jaw; 36, mandibular lymph-glands; 
40, parotid duct; 44, parotid gland; 45, prominence of chin; z, wing of atlas. (After Ellenberger-Baum, Anat. far 
external maxillary vein; facial continuation of 37; 
Kunstler.) 
Origin.—The paramastoid process of the occipital bone, in common with the 
posterior belly of the digastricus. 
Insertion —The posterior border of the ramus of the mandible. 
Action.—To depress the lower jaw and open the mouth. 
