18 HUMAN ANATOMY. 



The body is a hollow cube and presents upper,, lower, ante- 

 rior,, and posterior surfaces. 



The upper surface of the body presents from before back- 

 ward the following points : 



Ethmoidal spine, for articulation with the cribriform plate 

 of the ethmoid; 



Optic groove, lodging the optic commissure and terminating 

 in the optic foramen; 



Olivary process, a small, olive-like eminence behind the 

 optic groove ; 



Pituitary fossa, or sella turcica, for the pituitary body; 



10 



PIG. 9. 



1, olivary process; 2, ethmoid spine; 3, optic foramen; 4, lesser 

 wing; 5, anterior clinpid process; 6, posterior clinoid process; 7, 

 carotid groove; 8, Vidian canal; 9, hamular process; 10, pituitary 

 fossa; 11, sphenoidal fissure; 12, foramen rotundum; 13, foramen 

 ovale; 14, foramen spinosum; 15, spinous process; 16, pterygoid 

 process. 



Middle clinoid process, one on either side bounding the 

 pituitary fossa; 



Dorsum settee, or dorsum ephippii, a quadrilateral plate of 

 bone, bounding the pituitary fossa behind, and notched on either 

 side for the passage of the sixth cranial nerves; 



Posterior clinoid processes are the terminations of the dor- 

 sum sellae on either side and afford attachment to the tentorium 

 cerebelli ; 



Declivity, or clivus Blumeribacliii, supporting the upper part 

 of the pons Varolii ; 



Carotid or cavernous groove, lodging the cavernous sinus 

 and the internal carotid artery ; 



Linguldj a ridge of bone to the outer side of the cavernous 

 sinus. 



