THE HEAD AND NECK 1183 



lids, and from the outer part of the cheek terminate in the parotid 

 lymphatic glands. The deep lymphatics, including those of the orbit, 

 anterior part of the nasal cavity, roof of the mouth, and temporal 

 and zygomatic fossae, terminate in the internal maxillary glands. 



Parotid Lymphatic Glands. — These glands are arranged in two 

 groups — superficial parotid and intraparotid. 



The superficial parotid or pre-auricular lymphatic glands [lympho- 

 glandidcB auriculares anteriores) lie upon the superficial surface of 

 the parotid salivary gland, immediately beneath the parotid fascia, 

 and in front of the tragus of the auricle. They receive their afferent 

 vessels from the following sources: 



1. The outer surface of the auricle. 



2. The anterior wall of the external auditory meatus. 



3. The eyebrow, and upper and lower eyehds. 



4. The root of the nose. 



5. The upper part of the cheek. 



Their efferent vessels pass to (i) the upper superficial cervical, 

 or external jugular, glands, and (2) the superior deep cervical 

 glands. 



The intraparotid lymphatic glands {lympho-glandulca parotidecs) lie 

 within the parotid salivary gland, along the terminal part of the 

 external carotid artery. They receive their afferent vessels from the 

 following sources: 



1. The tympanic cavity, in part. 



2. The frontal region of the scalp. 



3. The anterior temporo-parietal region of the scalp. 



4. The parotid salivary gland. 



5. The deep facial, or internal maxillary, glands. 



Their efferent vessels pass to the superior deep cervical glands. 



Buccal Lymphatic Glands. — ^These glands are situated on the 

 buccinator muscle. They receive their afferent lymphatics from 

 the malar region and the lateral aspect of the face, and their efferent 

 lymphatics pass to the parotid and submaxillary lymphatic glands. 



Parotid Gland. — ^This salivary gland, which is of large size, is 

 situated on the side of the face immediately in front of the auricle, 

 and also below the auricle, where it occupies the space between 

 the ramus of the lower jaw and the stemo-cleido-mastoid muscle. 

 Its limits are as follows : superiorly, the zygoma ; inferiorly, the 

 stylo -maxillary ligament, in the direction of a line drawn from 

 near the tip of the styloid process of the temporal bone to the 

 angle of the inferior maxilla, this ligament separating it from the 

 submaxillary gland ; and posteriorly, the external auditory meatus, 

 the mastoid process, and the anterior border of the stemo-cleido- 

 mastoid muscle. The anterior border rests upon the posterior part 

 of the masseter, and it is from this border, above its centre, that 

 the parotid duct emerges. The duct is usually accompanied by a 



