28 



PR A CTICAL ANA TO MY. 



at the external angular process of the frontal bone and ends in the posterior root 

 of the zygomatic process of the temporal bone. The two ends are connected 

 by the zygomatic nir/i. 



MENTAL 

 FORAMEN 

 Levator 

 menti 

 Depressor 

 labii inf. 

 THE CHIN OR 

 MENTAL PRO- 

 TUBERANCE 



Temporal CORONOID PROCESS SIGMOID NOTCH External pterygoid 



Platysm; 



Depressor angull oris 



EXTERNAL OBLIQUE LINE 



GROOVE FOR FACIAL ARTERY 



FIG. 8. THE MANHIKI.F.. (Outer view.) 



Capsule 



Temporal 



MANDIBULAR 

 SPINE 



MANDIBULAR 



FORAMEN 



Spheno-mandi- 



bular ligament 



Superior 



constrictor 



Mylo-hyoid 



groove 



Internal 

 pterygoid 



Stylo- 



mandibular 



ligament 



GROOVE FOR SUB- 

 LINGUAL GLAND 

 Genio-hyo- 

 glossus 



Genio-hyoid 



Digastric 



Mylo-hyoid GROOVE FOR SUBMAXILLARY GLAND 



INTERNAL OBLIQUE LINE 



FIG. 9. THE MANDIBLE. (Inner view.) 



2. The zygomatic arch has (i) a malar and (2) a temporal portion. It is 

 formed by the zygomatic process of the malar and the zygomatic process of 

 the temporal bone. The arch has an upper and a lower border ; an outer and an 

 inner surface. 



