76 



PLATE XX XVI IT. 



MUSCLES 



A Sterno-mastoid, its sternal origin. 



A' Sterno-mastoid, its clavicular origin. 



B Platysma. 



C Splenius. 



D Levator anguli scapulae. 



E Scalenus anticus. 



F Scalenus medius. 



G Omo-hyoid, its posterior belly. 



H Trapezius. 



VESSELS 



a Subclavian artery. 



b External jugular vein. 



o Supra-scapular artery and vein. 



d Posterior scapular artery and vein. 



e Transverse cervical artery and vein. 



/ Superficial ascending twig from trans- 

 verse cervical. 



g Ascending cervical. 



h A muscular twig from ascending 

 cervical. 



NERVES 



1 Small occipital. 



2 Great auricular.* 



3 Superficial cervical. 



4 Spinal accessory. 



5 Communicating from third cervical to 



spinal accessory. 



6 Branch from fourth cervical to 



trapezius communicating with spinal 

 accessory. 



7 Supra-clavicular or descending 



branches of cervical plexus dividing 

 into 



8 Aerorvdal, 



9 Clavicular, and 



10 Sternal branches. 



11 Nerve to levator anguli scapulaa. 



12 Nerve to rhomboids, sending also a 



twig to levator. 



13 Supra-scapular nerve. 



14 Posterior thoracic. 



15 Twig from posterior thoracic to first 



serration of serratus magnus. 



16 Nerve to subclavius. 



17 Phrenic nerve. 



18 Cords of brachial plexus ; the figure is 



placed on the fifth cervical. 



* 2' is a large auricular branch from the small occipital, which took the place of the mastoid branch 

 of the great auricular. 



