114 



THE SKELETON 



Fig. 139. — The Skull in Horizontal Section. 



Temporal 



Ethmoidal fissure for anterior eth- 

 moidal nerve 



Anterior ethmoidal canal (for anterior 

 ethmoidal nerve) 



Ethmoidal foramina for olfactory- 

 nerve 

 Ethmoid 



Optic foramen (for 

 optic nerve) 



Foramen rotundum (second division 



of trigenunus 



Foramen ovale (third division of 



trigeminus 

 Notch for abducens nerve 



Depression for trigeminus 

 Hiatus canalis faciaUs 



Interior auditory meatus (facial 

 and auditory nerves) 



Jugular foramen (glosso-'haryngeal 

 vagus and accessary nerves) 



Hypoglossal foramen (hypoglossal oervO 



Parietal Ytfj; 



Occipital 



