( Eo<5 ) 
ecmes 4 Inches deep} for the Eminences (a. a .) approach (as 
they run backward) much nearer to one another, and the Sinus 
tunning obliquely downward becomes ftill deeper, having a Spina, 
(c ) 6 Inches long and one Inch deep. This Spina lerves for 
lnlertion of the Mufcles, which move the Head. The Bone on 
'>each fide of it is very rugous; which feems to be an excellent 
Contrivance, becaufe there is fuch a deal of Strength requir’d 
here in the Tendons, for fupporting the weight of the Head of 
this great Animal, ’twas requifite the Surface of the Bone whence 
they arife Ihould be very unequal, that their Fibres may be the 
more firmly impa&ed therein. Here ’tis alfo that the lax-Wax 
formerly mention'd was inferted. By means of this Spina in the 
middle, and the Eminences on both fides of the Sinus, the Surface 
of the Bone is much more enlarg’d, and the Mufcles with their 
Tendons are more capable to move the Head, either diredly or 
obliquely to either fide, than if the Bone had been plain. After 
the Spina of the Sinus is ended, the Bone fwells out toward the 
back-part 3 Inches, and then defeends 1 i Inch till it comes to 
the Hole for the Spinal Marrow (d. d. ) and here the Bone from 
above the Orificium Meatus Auditorij ( f. ) on each fide, becomes 
Protuberant 10 Inches ( e . e.) till it comes to the ProceJJus Condy 
loides (c.c.) This Protuberance has the fame Office asthe^p*?. 
phyfis Mafloides in other Animals, viz., for Infertion of the Mufcles 
which bend the Head inward. The Proccffus Cond'floidts (c c.) 
are 7 f Inches diftant inclufive } each of the Condyles being 2 -£ 
Inches broad from the Bight to the Left, as they arife gra- 
dually from their outer fide, and from below to above arifing 
(as it were Semicircularly) > Inches long. The Hole for the 
Spinal Marrow ( d . d .) at the upper part betwixt the Condyles is 
3 Inches broad, 2 i Inches at the middle, and 2 Inches at the 
lower part, till at laft it terminates in a Point. ’Tis 3 £ Inches 
long, and its Margin about the middle of the Condyle is 2 Inches 
thick. Below thefe Condyles the Bone becomes more flat ; inlbmuch, 
that tending inward there is a Sinus framed, above which the 
Troceffus Styloides arifes ( g.') being there articulated per Synchon- 
drofm. This Procejfus Styloides is cartilaginous about one Inch 
(b.J at its Bafe ; whence arifing hard and iolid 4 Inches ( k. ) flat 
on its infide, and convex on its outfide, being one Inch broad, it 
is afterwards divided, fending out another Bone 5 \ Inches long 
(». ) which bending toward the Scull, but outward from that 
^place whence it proceeded for the fpace of two Inches, it becomes 
gradually 
