58 SPECIAL ANATOMY. 



Presents, in the central line, Salcus longitudlnalis (for the longitudinal 

 sinus), extending from the Spina frontalis internet to the Eminentia cruciata. 

 On the sides the sulci arteriosi and cerebral impressions. Here, as upon the 

 external surface, the sutures, already mentioned, may be seen. The brittle, 

 hard, bony tissue on the internal surface of the fornix is called the vitreous 

 table, lamina vitrea. 



4. External surface of the skull ; it is covered with pericranium (perios- 

 teum) ; presents (the sutures, ut sup.). Besides these: 



a. Vault; linea semicircularis, one upon either side, from the central frontal 

 eminence to the spina occipital, externa. 



Tuber a frontalia, par let alia. 



b. On the basis : 



1. Anterior half: Pars nasalis, process, or bit ales, occipitales , 



2. Posterior half: Spina and Crista nccipit. extern., Proc. condyloid., Pars 

 basilaris. Lin. semicircular, inferior, Occiput, Fossa condy/oid. poster., Fora- 

 men lacerum posterius s. fugulare ,- Foramen lacerum anterius, with Sulcus 

 carotic. and Tuba Eustacfiii, to which point all the sutures of the posterior 

 half of the basis Crunii proceed. 



More externally and posteriorly: Proc. niastoid., Proc. styloid., For. stylo- 

 mastoid., and the inferior opening of the Canalis caroticus. 



c. At the sides : the mastoid region, forarn. mastoid., meatus auditor, ex- 

 tern., cavitas glenoidea, root of the Proc. zygomatic., os temp. 



Fossa temporalis, temporal fossa, is the name given to the space between 

 the lateral part of the skull and the zygoma, which below passes into the 

 zygomatic fossa, is occupied by the temporal muscle and formed by the tem- 

 poral bone, ala magna of sphenoid, malar, superior maxillary, and frontal 

 bones, and bounded below by the zygomatic arch ; above, by the lin. semicir- 

 cular is. 



58. B. Ossafaciei, Bones of the face, 14. 



a. Those occurring in pairs. 



59. 1. Ossa maxillae superioris, 2. Upper jaw-bones. 



Position : anteriorly in the face, below the orbits. 

 Shape : irregular, almost cubical, short; Body with 4 processes. 

 Conjunctions with: Frontal, Ethmoid, and Sphenoid bones, and 

 with all the bones of the face except the lower jaw. 



1. Body, hollow, bounded by four surfaces. 



a. Anterior, facial surface, planum faciale, is bounded above by: Margo 

 infraorbitalis, the inferior border of the orbit, for m. orbicul. palpebrarurn and 

 levator lubii superior is ; underneath this, foramen infraorbitale for nerv. art. 

 and ven. infraorbitule ; within this the ant. alveolar foramen for ant. dental 

 nerve; andfovea maxillaris s. caninus, for m. lev. anguli oris. 



b. Posterior, temporal surface, arched, with : Tuber maxillare ; foram. al- 

 veolar, poster., leading to a canal running along the floor of the antrum, for 

 nerv. art. and ven. alv. post. 



c. Superior; orbital surface triangular, with: Sulcus and canalis infraor- 

 bitalis, for nerv. art. and ven. infraorbitalis, which opens upon the facial sur- 



