502 ORGANS OF DIGESTION. 



ness it extends from the integuments externally, to the styloid 

 process, the styloid muscles, and the tendon of the digastricus, 

 internally, being there only separated from the internal carotid 

 artery by these parts. It is traversed from behind forwards by 

 the portio-dura nerve, and from below upwards along its inter- 

 nal margin by the external carotid artery and the temporal vein. 



This gland has no appropriate capsule, but being covered, on 

 its external face, by the continuation of the fascia superficialis 

 of the neck, prolongations are sent from the fascia which pene- 

 trate it in every direction, and keep its lobules together. 



Its duct (Ductus Stenonianus) departs from its anterior edge 

 a few lines below the zygoma, and traverses the outer face of 

 the masseter muscle, in a line, according to the observations 

 of Dr. Physick, drawn from the lobe of the. ear to the end of 

 the nose. It is about the size of a crow quill, is hard and ten- 

 dinous, with thick parietes. It lies close to the masseter mus- 

 cle, and at the anterior edge of the latter penetrates a pad of 

 fat commonly found there on the side of the cheek; it then 

 perforates the posterior end of the buccinator, so as to have 

 its oral orifice opposite the second large molar tooth of the up- 

 per jaw. On opening the mouth wide during a state of fast- 

 ing, a jet of saliva will sometimes indicate the position of this 

 orifice. 



A small gland (Gland. Accessoria Parotidis) is sometimes found 

 between this duct and the zygoma; it varies in form and size, 

 and has a distinct excretory canal discharging itself into the 

 parotid duct, 



The Submaxillary gland (Glandula Submaxillaris) is not more 

 than a third or one half the size of the last, and has a more re- 

 gular form in being somewhat ovoidal. It is accommodated 

 in the depression on the side of the neck formed by the body 

 of the lower jaw externally, by the mylo-hyoideus muscle 

 above, and by the tendon of the digastric below. The platys- 

 ma myodes intervenes between it and the skin. It almost 

 touches the parotid gland behind, being separated from it only 

 by a process sent in from the fascia superficialis, and continu- 

 ous with the ligament, going from the styloid process to the 

 ramus of the lower jaw. As it extends to the posterior margin 

 of the mylo-hyoideus muscle, it there touches the sublingual 



