286 



SPLANCHNOLOGY. 



inferior maxilla and tlie anterior border of the wing of the atlas i 

 it lies immediately below the ear, which it partly surrounds, and is 

 covered by the deprimens aurem. It is related internally with 

 the guttural pouch, and inferiorly it occupies the angular space 

 formed by the jugular and glosso-facial veins. It is greyish, and, 

 like all salivary glands, conglomerate, consisting of a number of' 

 lobes held together by dense areolar tissue, these again consist- 

 ing of lobules, each of which is formed by minute vesicles, 

 originating in the dilatation of the branched origins of th^' 

 ducts. The latter unite t^ form larger ones, and terminate in 

 Steno's duct, which commences at the antero-inferior surface. 



Fig. 92. 



Right infero-lateral view of the head ; the maxillary ramus, cheek, parotid gland, and upper lip 

 Leing removed, a, Submaxillary gland ; b, Wharton's duct ; c, Sublingual gland ; d, Its excretory 

 orifices ; e e, Labial glands ; /, Their excretory orifices ; g, Papilla, with orifice of Steno's duct ; 

 h. Orifices of the superior, and, i, those of the inferior molar glands ; k, The hard palate ; I, The soft 

 palate ; to, The tongue, with its papilla ; n, Pillars of the tongue and soft palate ; o, Fraenum- 

 linguse. 



near the insertion of the sterno-maxillaris, passes ' along the 

 posterior aspect of the digastricus, round the ramus of, the 

 lower jaw, in company with, and posterior to, the glosso-facial 

 artery and vein ; it thus runs along the anterior border of the 

 masseter, and enters the mouth at about the level of the third 

 upper molar tooth, the orifice of the duct being marked by a 

 papilla on the buccal membrane. In some animals there is a 

 small detached gland connected with it, the glandula soda paro- 

 tidis, which opens into the parotid duct as it crosses the masseter. 

 The duct consists of an internal mucous and an external con- 

 tractile coat. 



