44 
PEOrESSOE OWEN ON SO^IE EE^NIAINS OF 
Inches. 
. 3 
. 0 
. 0 
. 0 
. 0 
. 1 
. 1 
. 0 
. 1 
Lines. 
4 
9 
4 
0 
6 
0 
i 
10 
Vertical diameter from highest part of nerual arch . 
Transverse diameter of anterior outlet of neural canal 
Transverse diameter of posterior outlet of neural canal 
Vertical diameter of anterior outlet of neural canal 
Vertical diameter of posterior outlet of neural canal 
Longest diameter of anterior zygapophysis . . • 
Vertical diameter of costal tubercle 
Transverse diameter of costal tubercle .... 
Antero-posterior extent of base of neurapophysis . 
The anterior articular concavity of the centrum, aa shown by the above 
ments, is a transverse ellipse, very obliquely f ^ed, lookmg — rd and rwari^ 
this asnect is shown in the section of the smaller vertebra (Plate \ III. )• 
ll7ar sX is smooth ; in the larger vertebra (Plate VII. fig. 4, o) tt presents a 
shallow transversely lengthened pit at the centre. ^ ^ j 
The under surface of the body(a fig. 3) is flat feom before backwai-d, broad, and v 
convex transversely ; it is a Uttle roughened, with two very shallow depressions 
as if for aponeurotic attachments, but shows not a trace of hypapophysis. The hm 
articular- convexity corresponds in size and shape with the anterior cup has an 
opposite aspect ; the plane of the base of the ball {ii fig. 1, J) foi-ms an angk of 4.5 nr A 
that of the lower surface of the centrum ; the lateral mai-gins of the ball pioject 
beyond the narrow constriction which there divides it from the rest 
In front of this constriction the sides of the body rise, expanding, vnth an onto con 
vexity, as they advance to the costal tubercle, which is sUuated upon the 
base of the neurapophysis. Some wrinkled and vascuto ‘“P” ^ 
indicate the place of the obliterated suture betvveen the nein-al arch and ce ^ 
The base of the costal tubercle (ii. fig. 1, <*) a vertical ellipse, of the , 
above -iven On the right side its convexity is shown, the articular surface not bem, 
abraded beyond the thin crust of bone which formed it: on the left side the abiasion 
fx^osls thrarser cancellous texture of the bone beneath. Abov. the tub-le a ridge 
or an<rle formed by the meeting of the anterior and lateral sm-faces of the neurap 
physis^extends to the outer end of the anterior zygapophysis^ The ai'ticular surface of^ is 
process is flat, and looks upward and inward. The broad upper surface o the neural 
arch between the processes is rather concave, traversed by a low median 11 o ( ■ 
„r On Tach side of this, at the fore-part of the arch, is a small tubercle^. 
n .(’this the surface is roughened by smaU shallow pits arranged in progressively 
indicative oL place of ligamentous attachment: betvveen 
‘Zmlcf and the zygapophysis is a broad and very shallow ^^P” 
Sck^t 
looks downward and outward. 
