86 



for the Styloid and the somewhat similar area for the narrow anterior 

 border of the Stern o-Mastoid. 



The Temporo-Mandibular vein pursues its course on the deep sur- 

 face of the gland. It is usually described as being altogether buried 

 in the gland in company with the external Carotid Artery. 



Our observations have shewn us that this is not the case and 

 that both of these vessels really run in grooves on the deep aspect 

 of the gland, the artery for a much shorter course than the vein (see 

 Fig, 4). The amount of gland substance overlapping them is very 

 variable and sometimes the vein appears to be actually imbedded in 

 the gland. However, in all these cases by gently stretching the 



Temporo-Mandibular Vein 



Sterno-ilastoid 



Masseter 



Digastric 



Ext. Carotid. Art Styloid 



Fig. 4. Transverse section of upper part of left parotid (seen from below) 

 showing external carotid artery and temporo-mandibular vein in grooves on the sur- 

 face of the gland; also relation of styloid process. (Natural size.) 



lobules we could distinctly see the blue colour of the vein, a con- 

 dition that would of course have been impossible had the vessel been 

 really imbedded in it. In two specimens the vein lies actually for 

 the whole of its length on the inner surface of the gland and in three 

 specimens it was simply enfolded in an obvious groove; in the 

 remaining glands, more or less obvious lobules covered over the vein. 

 But in no case did the vein lie completely surrounded on every side 

 by a solid mass of gland tissue. The vein pursues its course on the 

 antero-internal surface of the gland leaving it a short distance above 

 the apex and lying a little anterior to the artery. 



The External Carotid Artery seen from the inner aspect is still 

 more superficial, and in none of our specimens is it more than 

 partially enwrapped by the tissue of the gland. In fact this Artery 



