Parotid Gland 1 1 7 



membrane passing to the jaw, the floor of the mouth, the soft palate, 

 and the epiglottis ; the genio-hyo-glossus, hyo-glossus, stylo-glossus, 

 palato-glossus, and lingualis ; the lingual artery and vein ; the gusta- 

 tory, hypoglossal, and glosso-pharyngeal nerves. 



Ranula (? dimin. Q{ rana, frog) is a collection of fluid in a mucous 

 gland in the floor of the mouth, or in the duct of one of the salivary 

 glands. The fluid, however, is not saliva ; it is thick and glairy, and 

 may be secreted again and again after incision and scraping of the 

 cyst, and after swabbing out the interior with glacial carbolic acid. 

 Simply to snip a piece out of the wall of the cyst rarely suffices for 

 obliteration, for on the collapse of the cyst the edges of the wound 

 fall together and unite, and the fluid begins again to collect. 



THE PAROTID GLAND 



The parotid gland (napa, near ; ovs, wro?, ear} is a compound 

 racemose gland, enclosed in a tough capsule which is obtained from 

 the deep fascia. It lies in the hollow which is bounded behind by the 

 sterno-mastoid, the mastoid process, and the external meatus ; in front 

 by the ramus of the jaw ; deeply, by the stylo-maxillary ligament, and 

 above by the zygoma. 



This limited space, however, is not sufficient ; and some of the 

 gland passes deeply behind the condyle into the glenoid fossa, 

 and beneath the sterno-mastoid, against the digastric ; a little of it 

 extends over the sterno-mastoid, and a good deal of it spreads over 

 the masseter. A portion of the gland also is tucked beneath the 

 ramus of the jaw, and even between the pterygoid muscles. From 

 this (anterior) part the duct emerges, and connected with it is an acces- 

 sory piece of the gland, the soda parotidis. The gland is covered in 

 by a process of the deep cervical fascia (p. 2), the lower part being 

 also beneath the platysma. 



Additional connections of the gland are as follows: The external 

 carotid artery, having entered it, sends off the superficial temporal and 

 internal maxillary branches from its substance ; the posterior auricular 

 winds up between the gland and the mastoid process, and the transverse 

 facial emerges from its anterior border. The external jugular begins 

 in the gland by the confluence of the superficial temporal and internal 

 maxillary veins, and sends a branch through the deep part of the gland 

 to join with the internal jugular. The primary branches of the facial 

 nerve come through the front of the gland, and the auriculo-temporal 

 ascends beneath its upper end. Close beneath the gland are the 

 internal carotid artery, the internal jugular vein, and the vagus. 



Supply. Branches for the gland come off from the various arteries 

 in its substance, the blood being returned to the external jugular vein. 

 The lymphatics pass to superficial glands near the parotid, and into 



