2G CIMOLIASAURUS. 
~ 
New Jersey. The vertebrae have slightly biconcave bodies and are usually well 
preserved, though all the specimens I have had the opportunity of examining have 
had their arches and processes broken off, apparently after their discovery. Of such 
vertebrae thirteen specimens, from Burlington County, N. J., were presented to the 
Academy of Natural Sciences by Dr. 8. G. Morton. They appear to have belonged 
to the same individual, and consist, as I suppose them to be, of two dorsals and 
eleven lumbars. 
The body of the dorsal vertebra, Figs. 13-16, Plate V, is the transverse section 
of a cylinder compressed from above downward and contracted towards the middle, 
resembling in form the body of the cervical vertebra referred to Discosaurus, 'The 
articular faces are transversely oval, slightly emarginate above, and are more concave 
than in the cervical vertebra of Discosaurus. They present a central prominence, 
are bevelled off at the border, and are defined by a subacute edge from the rest of 
the body. A pair of large venous foramina underneath the latter communicate with 
channels opening by a single large orifice in the spinal canal, which is depressed 
towards the middle and wide. The vertebral arch has been coosified with the 
body, but its loss prevents me from ascertaining anything in regard to its form. In 
one of the specimens, as represented in Figs. 13, 14, 15, there projects from the 
middle of the side of the body a short, robust, cylindroid transverse process, termi- 
nating in a large irregular facet for the articulation of a rib. In the other vertebra, 
Fig. 16, probably a more anterior one, the transverse process is broken, but its base 
indicates it to have been of greater vertical extent than in the former specimen, 
though not quite so wide, nor does it extend so low, but above appears nearly to 
have reached the abutment of the vertebral arch. 
The size of the two specimens is nearly equal, their measurements being as 
follows :— 
Lines. 
Length of the vertebral body. 5 . : ; e 3 ; : 82-33 
Breadth of articular surfaces. c 5 : 5 : 5 5 : a) ey? 
Height : : - : 2 s P ‘ 5 > : . 42 
Width of spinal canal at the middle . ; ; E : : é : Sel, 
Width of spinal canal at the extremities. : : 5 3 
Breadth between articular facets of transverse processes. : c : Seif 
The eleven lumbar vertebra, of which the largest and smallest specimens are 
represented in Figs. 17-19, Plate V, and 16-18, Plate VI, do not form an unbroken 
series, but the specimens successively diminish in size from nearly that of the dorsals 
just described, to a size rather less than the supposed caudals of Discosaurus. They 
are nearly identical in form throughout. The more anterior have the body abso- 
lutely somewhat longer than in the dorsals, though the other diameters are dimi- 
nished. ‘The articular extremities are also slightly more dished than in the dorsals, 
and almost devoid of the central prominence. The venous foramina on the under 
part of the body are nearer together, and the intervening portion of bone appears 
pinched into a convex ridge. ‘The more posterior specimens, which may be re- 
garded as caudals, have the articular extremities of their body rather more concave, 
and underneath they do not form so prominent a ridge between the position of the 
-two venous foramina. 
