THE ARTERIES. 



229 



from the upper border of the membrane to the point of attachment 

 of the Columella auri* (extrastapedial), round which it forms a 

 circular anastomosis. The Eamus auricularis also anastomoses with 

 the cutaneous artery. 



Fig. 149. 



Dissection to show the occipito- vertebral and the cutaneous arteries. 



The skin of the back has been divided by a median incision and drawn to either side ; the right arm 

 ^dislocated and removed through the opening in the akin (at A). On the left side the extensor 

 muscles of the back have been removed. 



t.m. Cutaneous artery. 



c.p. Arteria cutanea pectoris. 



o Occipital artery. 



* Scapular artery. 



v Vertebral artery. 



(4) A branch passing inwards to the fat-body, and lying immedi- 

 ately in front of the deltoid muscle (Virchow). 



(o) -^- small branch running on to the inner surface of the angle 

 of the jaw and then forwards (Virchow). 



