THE VEINS. 



243 



(i) The internal jugular vein [Fe^ia jtigularis), (Fig. 160 J) can 

 be traced from the border of the M. levator scapulae upwards and 

 forwards to the hinder part of the prootic bone : it then passes 

 forwards under the lateral process of the prootic, in a groove on 

 the anterior surface of the same bone, towards the hinder angle of 

 the orbit, where it receives the veins from the cranial cavity (see 

 vessels of brain, p. 165), and also a branch from the orbit. 



Fig. 160. 



Distribution of the internal jugular vein and the anterior portion of the cutaneous vein. 



Vena orbitalis posterior. 



Lateral process of the prootic bone. 



Subscapular vein. 



Shoulder-girdle. 



Tympanic membrane. 



Vertebral vein. 



Transverse process of the second vertebra. 



Transverse process of the third vertebra. 



Transverse process of the fourth vei-tebra. 



a. [The Vena orhitalis media (Virehow) ; it arises from the an- 

 terior internal angle of the orbit, from the Harderian gland, the 

 nasal cavdty, or from other veins on the anterior wall of the orbit. 

 The vessel lies close to the cranium, immediately underneath the 

 Arteria nasalis, and sinks under the M. rectus superior to join the 

 internal jugular vein. It its course it receives the Vena hulhi supe- 

 rior (see eye), and near its termination communicates with the 

 Vena orhitalis posterior.^ 



R 2 



