28 



PR A CTICAL ANA TOMY. 



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 arcJi. 



MENTAL 

 FORAMEN 

 Levator 

 menti 

 Depressor 

 labii inf. 

 THE CHIN OR 

 MENTAL PRO- 

 TUBERANCE 



Temporal CORONOID PROCESS SIQMOID NOTCH External pterygoid 



CONDYLE 



Platysma 



Depressor anguli oris 



EXTERNAL OBLIQUE LINE 



GROOVE FOR FACIAL ARTERY 



ANGLE 



FIG. 8. THE MANDIBLE. (Outer view.) 



External 

 pterygoid 



Capsule 



MANDIBULAR 

 SPINE 



MANDIBULAR 



FORAMEN 



Spheno-mandi- 



bular ligament 



Superior 



constrictor 



Mylo-hyoid 



groove 



Internal 

 pterygoid 



Stylo- 



mandibular 



ligament 



Temporal 



GROOVE FOR SUB- 

 LINGUAL GLAND 

 Genio-hyo- 



glOSBUS 



Qeiiio-hyoid 



Digastric 



Mylo-hyoid 



INTERNAL OBLIQUE LINE 



GROOVE FOR SUBMAXILLARY GLAND 



FIG. 9. THE MANDIIU.K. (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 hwr border ; an outer and an 

 inner surface. 



