( i 07 ) 
gradually fmaller, till it terminates in a Point not unlike that part 
of a Pen wherewith we write. This Bone is fo iituated in the 
Bafts of the Scull, that ’twas irapohible to give any Idea of it 
in Situ , and therefore I caus’d them to take the figure of it apart. 
Betwixt the Sinus below the Procejfus Styloides and the Condyles , at 
I \ Inch diftant, is Iituated the Hole for the jugular Vein ( m.m .) 
through which alfo pafies the Par vaoum ("See n. Fig. 14.) which 
being Oval, is 5 \ Inch long, and \ Inch broad. On the out- 
fide of the Procejfus Styloides , is to be feen the Hole for the bard 
Portion of the ‘JSfcrvus Audit orius (l.) This is fo near to the Root 
of the Sinus, that it could not be well fhewn in the Figure. Be- 
twixt the Origin of th e Procejfus Styloides (g-g.) and tire Hole for 
the jugular Vein (m.m.) is lodg’d the boney part of the Aque- 
duct («.».) which defeends 5 Inches; ’tis \ Inch broad, and fo 
fiat that it could fcarce be reprefented in the Figure. From 
thence is a Crena , whofe Orifice is reprefented by (0.0.) where 
its fleflry part was contain’d, which communicated with the Pa- 
late ; it defeends 3 Inches obliquely inward. From the forefaid 
Hole for the jugular Vein (m.m.) is Iituated the Hole for the 
Carotid Artery, which is fo large as to admit the Point of ones 
Little Finger (p.p.) Defcending in a ftreightLine from the Pro- 
ccjfus Styloides (g.) % \ Inches, you come to the Hole where the 
Arteria dura Matris enters the Scull, and by which the 3 Branch 
of the 5th Pair of Nerves paffes out : Here alfo the Vein, which 
returns by the great Hole in the Os Maxillare from the Probofcis , 
(after it has pall: Tome fpace beneath the Lamina, which makes 
up the upper edge of the Sinus for the Orbit of the Eye,) palfcs 
out, and runs back to be joined with the jugular Vein. Thefe 
Holes are Iituated on each fide, betwixt the Aquedull and the Si- 
nus for reception of the Lower Jaw (y.) and are both receiv’d 
within a like Sinus , fo that they could not be reprefented by an 
Orifice. The Bone for Reception of the Proceffus Styloides, as I 
have faid, is deprefi • and from thence for the fpace of two Inches, . 
till you come to the Hole for the Carotid Artery (p.p.j it is rais’d 
for the Aqueduct (n. n.) From thence, betwixt the two Holes, 
’tis gradually Protuberant to the Condyle : From below this Hole 
(p.p.) ftreight downward, during the Progrefs of the two .s^w 
dutts (n. n.) which are 3 Inches diftant, *tis depreft, till you come 
to the Choana , or Paflage betwixt the Palate (t.) and the Root 
of the Trunk (i. ) Between the two Holes for the Arteria dura 
matris ’tis 6 Inches (q. q.) Jhe length of the Sinus, called in Hu- 
01 • d 
V 
