Chap. VI. The Jnatomy of aHOKS^. gj 



to the Opt'ick Nerve, the reft are penetrated, feme by one, 

 and fome by leveral Paits of Nerves ; others by the Carotid 

 Arteries and Jugular Veins, and again, others both by 

 Nerves and Blood- vefiels. 



The Os Cribrifcrme is the next Bone '^^^e Os Cri- 

 common to the Head and upper Jaw, and is bnforme, or 

 fo called from its innumerable little Holes, ^^(^•'^(•li^eBone* 

 which make it like a Sieve. It is litua:ed in the fore and 

 under Side of the Skull, between and a little below the 

 Sockets of the Eyes, and at the upper Part of the Noftrils, 

 and is joined by an even Line to the Forehead bone, the 

 fecond of the upper Jaw, and the Wedge-like Bone. 



It is made of four Parts, viz. the Crijia Galii, or 

 Cock's Comb, to whofe fliarp Appendix the Falx adheres. 

 The fecond Part is that which is perforated, and mnkes up 

 the greateft Portion of it. The third is only a Piece's of 

 Its under Si.^«, by which the Noftrils are divide] ; And 

 the fourth is called the Os Spongiojum ; its Cavities being 

 filled with a fpongy fort of Flefli. This Bone helps to 

 rnake up the Corner of the Orbit of the Eye, and through 

 its Holes gives a Paflage to the innumerable Fibriila: of the 

 Auditory Nerves. 



The laft is the Jiigale or Yoke- like Bone, q , . 

 and is compofcd of two Bones; one of which ° 



is a Procefs of the Tcriiple-bone, and the other a Proce.s 

 of the firft Bone of the upper Jaw, forming the lower Sids 

 of the lefler and outer Corner of the Orbit of the Eye. 



§. II. Of ths Jaiv-boncs end Teeth^ together ivith the 

 Os Hyoides, ar Bone of the Tongue. 



Befides the Bones which are common to 

 the Skull and upper Jaw, there are twelve, 1"7'^^ ^?^' 



r u c- r u- u ♦ proper to ttjc 



wz. fix on eachSicie, which are proper to upLrJa'-uV-z 

 the upper Jaw alone, and are thole which 

 frame the lower Side of the Orbit of the Eye, the Nofe, 

 Cheeks, and Roof of the Mouth. 



The firft is called Zygomaticu?n^ becaufe <^^^ ^„ 2y, 



its Procefs makes up a Part of the O; Jugale : gomatlcum. 



It compofes the lower Part of the outer ^ithitsfcli.'w. 

 Corner of the Eye. 



The next is feared in the inner Corner of ^^^ fecond, 



the Orbit of the Eye, and is called Lachry- Lachrymale. 

 piale^ becaufe it has in it a Cavity which con- 

 tains the Lachrymal Gland. This Bone has alfo a Perfora- 

 G 2 tics 



