28 CIMOLIASAURUS. 
the spinal canal. The broken abutments of the vertebral arch are much broader 
and stronger, in accordance with their being required to sustain the transverse pro- 
cesses, than in the more posterior dorsals. The spinal canal is large and depressed 
towards the middle of the floor. 
The measurements of one of the anterior dorsals, which are nearly of the same 
size, are as follows :— F 
Lines. 
Length of the vertebral body . é : : : : : : : . 386 
Breadth of articular surfaces. , : 5 : ¢ . : ' Sih 
Height of articular surfaces : : : : : : 3 : : Pur) 
Width of spinal canal . : : : : : é : 5 ¢ : 5 i 
A more posterior dorsal vertebra, represented in Fig. 5, Plate VI, differs from 
the preceding in the less length and depth of the body and the slightly greater 
breadth, but chiefly in the lower position of the transverse process, which extends 
from the vertebral arch to near the middle of the side of the body. The measure- 
ments of this specimen are as follows :— 
Lines 
Length of the vertebral body c : ‘ : : : : : . 33 
Breadth of the articular surfaces . : 2 : 5 é : : . o4 
Height of the articular surfaces . : 5 ; : 5 : 4 - . 43 
The remaining two posterior dorsal vertebra, represented in Figs. 6-9, Plate VI, 
appear to be from near the termination of the series. ‘They have the same form of 
body as the Burlington County specimens of posterior dorsals, above described, with 
which they also nearly agree in size. ‘The transverse processes are short, robust, 
irregularly cylindroid protuberances, projecting from the lower part of the side of the 
body and terminating in an articulating facet for arib. In the foremost of the two 
vertebrae, Fig. 7, the facets are sub-circular and irregularly convex; in the other, 
Fig. 9, they are transversely oval and irregularly concave. On the under surface 
of the body of the former, Fig. 6, there are two large foramina on each side com- 
municating with venous channels opening into the spinal canal; in the latter, Fig. 
8, the under part of the body presents two very large venous foramina, between 
which the bone forms a convex ridge, not existing in the preceding vertebra. 
Measurements of the two posterior dorsal vertebrae are as follows :— 
Lines. Lines. 
Length of the body . : : ° ° . . 383 35 
Breadth of the body . ; 6 - c : S B . . o6 52 
Height of the body. : . : c . 2 . 5 9 40 
Width of spinal canal . : : : > ° ° 5 : 3 11 
Vertical diameter of facet for the rib. . A ; c ¢ LS 16 
Transverse diameter of facet for the rib ‘ . 2 6 , 5 alts) 20 
The eight lumbar vertebra, of which the largest and smallest specimens are 
represented in Figs. 10-15, Plate VI, form a nearly unbroken series, and followed 
close after the dorsal specimens just described. They correspond in form and con- 
stitution with the Burlington County specimens, except that the median part of * 
their body beneath, between the position of the venous foramina, forms a more 
prominent ridge. 
