The fir ft 
Vertebra of 
the Neck. 
T*b. 4. Fig. 
A. 
A . K 
’The fecctfd. 
A. 2. 
( v»< ) 
Bone, after the Head was taken out of the Caldron, that I have 
now come to give this Account of it. 
From the Head we go to the Trunk, which confifts of the 
Spine, Ribs, and Sternum. The Spine is divided into the Verte- 
bra of the Neck, Back, Loins, Os Sacrum , and Tad. The Verte- 
bra of the Neck differing from each other in feveral things ma- 
terial, I fhalJ fpeak of them feparately : Whereof 
The firlt call’d Atlas, has four confiderable Cavities; two at 
the fore part ( b . b.) whereby it receives the Condyles of the Scull, 
and two at the*back-part (c.c.) whereby it receives the Bafe of 
the following Vertebra ; the fir ft two are 2 f Inches from above 
to below, and 2 Inches from the Right to the Left. It has a 
large Hole in the middle, divided into its larger pa t ( a .) 3 In- 
ches Diameter, which is for receiving the Spinal Marrow, and 
LefTer, which receives the Tooth of the following (b.) Four Per- 
forations, or two Pair of Holes at the Sides ; one at its lower 
and fore-parc ( c . c ) which receives the Arteria CervicaUs , or 
Vertebralis from the fide of the Spinal Marrow, and conveys it 
to a Crena (e. e ) along which it runs, till it again penetrates the 
fame Bone (d. d.) and goes out at the back part ; after which in 
its Progrefs it perforates all the tranfverfe Procefies of the reft of 
the Vertebra of the Neck, as is ufual in other Animals. This 
Crcna is guarded on its outfide, or at the Extremity of the tran- 
verfie Procefies by a Protuberance, which runs toward the Scull 
3 i Inch (a. a.) till it be equal to the Sides of the Hole for the 
Spinal Marrow. At its upper and fore-part it inclines obliquely 
{f.) where *tis % Inches thick, and at its lower and back-part 
(e.) it has a Protuberance which is extended where it embraces 
the Tooth. This Vertebra is in Diameter 12 Inches (a. a.) The 
tranfverie Procefies are in breadth from above to below 2 inches, 
and in length at their lower part ; Inches. 
The fecond Vertebra has remarkable in it, ift A large Protu- 
berance called the l ooth ( d.') which is received by an Hole in 
the former, and ferves as an Axis upon which the Head is turn’d 
round. This Tooth runs forward from the Body of the Vertebra 
z Inches above, and 2 f Inches below, tapering and terminating 
in an obtiife Point. 2. A large Protuberance aril ng from its 
upper and middle part (a. a.) (like the Procejfut S.pinofus in others, 
4 Inches from the beginning of the tranfverfe Procefies, two In- 
ches broad at the top, terminating in two obtnfe Points, with a 
Smm (ft?- ) larger at the back than therfare-part) in the middle.- 
