CHAPTER lY. 



HLE^D. 



OSTEOLOGY. 



The HEAD is divided into cranium and face. 



Cranium. — Division : Seven bones — occipital, pari- 

 etal, frontal, ethmoid, sphenoid and two temporals. 



Occipital. — Division : Two faces and a circum- 

 ference. External face is divided into three parts. 

 Presents parietal crest, occipital protuberance, cervical 

 tuberosity, occipital foramen, basilar process, mastoid 

 crest, muscular imprints, condyles, styloid process, notch, 

 condyloid fossa and foramen. Internal face, concave, 

 forming the posterior cavity of the cranium. Cb*cum- 

 ference is divided into two anterior and two posterior 

 lateral borders, joined by four angles. Development; 

 four nuclei of ossification. 



Parietal. — Division : Two faces and four borders. 

 External face is convex, and shows the parietal crest 



