IIJ 



A MANUAL OF ANATOMY 



small portion of the gland, which lies above it, and may take the 

 form of a distinct lobe. It is known as the pars or glandula socia 

 parotidis. The superficial surface of the gland, which presents the 

 usual lobulated appearance of compound racemose or acino-tubular 

 glands, is covered by the parotid fascia, which is an upward ex- 

 tension of the deep cervical fascia. It is very dense, and conse- 

 quently a parotid abscess is subjected to considerable tension. 

 Lying beneath it, on the surface of the gland, there is the super- 

 ficial set of parotid lymphatic glands. The deep connections of 

 the gland are very intricate. It extends deeply between the 

 mastoid process and sterno-cleido-mastoid behind, and the pos- 

 terior border of the ramus and angle of the inferior maxilla in front. 



Stensen's Duct 



arton's Duct 



Fig. 481.^ — The Salivary Glands of the Right Side. 



Superiorly, a deep extension of the gland, known as the glenoid 

 portion, occupies the posterior part of the glenoid fossa, formed 

 by the tympanic plate, and lying behind the fissure of Glaser. 

 Lower down it extends both in front of, and behind, the styloid 

 process and styloid muscles, and is here intimately related to 

 the internal carotid artery, internal jugular vein, and glosso- 

 pharyngeal, pneumogastric, spinal accessory, and hypoglossal 

 nerves. The deep surface of the gland is invested by an upward 

 extension of the deep cervical fascia, which, with the parotid 

 fascia, forms a capsule for the gland. Anteriorly, the gland ex- 

 tends deeply behind the posterior border of the ramus of the lower 

 jaw, as far at least as the posterior border of the internal pterygoid 

 muscle, or it may be for a short distance between that muscle and 

 the external pterygoid. 



