78 HADROSAURUS. 
complete; a fibula, with one end lost; two metatarsal bones and a phalanx, com- 
plete; two small fragments of jaws, and nine teeth. 
Of the vertebree three appear to belong to the cervical series, seven to the dorsal 
series, and the remaining eighteen to the caudal series. 
The three mutilated cervical vertebra, represented in Figs. 1, 2, 3, Plate XII, 
are from the middle or posterior part of the series. Their body is provided with a 
hemispherical articular convexity in front, and a corresponding concavity behind. 
The outline of the articular end is hexahedral. The articular convexity is some- 
what flattened at the summit, which slopes upward. The lateral borders of the 
convexity expand and unite below in a broad lip. The sides of the body, at their 
fore part above the middle, are furnished with a tuberosity, or inferior transverse 
process, terminated by a concave, roughened facet for articulation with a cervical 
rib. Below the process the side of the body is concave longitudinally and vertically. 
The lower part of the body forms a broad ridge, slightly convex transversely and 
concave longitudinally, expanding towards the articular margins of the bone, but 
to the greatest degree posteriorly. 
In one of the specimens, in which the vertebral arch is preserved, though devoid 
of its characteristic processes, the spinal foramen is seen to be of large size and 
nearly circular; measuring sixteen lines high and eighteen lines wide. 
The length of the body, in the most perfect specimen, measures at the side about 
two inches and a half. The same specimen from the bottom of its articular con- 
cavity to the summit of the corresponding convexity measures thirty-two lines. 
The depth of the articular concavity is about thirteen lines; the prominence of the 
anterior convexity is seventeen lines from the lateral border of its base. 
The extreme height and width of the body of a second specimen, which possessed 
about the same length as the former, measures at the base of the articular convexity 
about thirty-eight lines. The breadth of the abutment of the vertebral arch in the 
same specimen is nineteen lines. 
A dorsal vertebra, represented in Figs. 4, 4, a, Plate XII, from the anterior part 
of the series, has its body convexo-concave as in the cervical specimens. The 
length of the body laterally is about three inches; its height and width anteriorly 
thirty-four lines. ‘The articular ends are cordiform in outline. The anterior articular 
convexity is nearly as prominent as in the cervical vertebra, but the corresponding 
posterior concavity (Fig. 4, a) appears less deep, from the borders being bevelled 
off outwardly. 
The sides of the body are longitudinally concave, and meet below in a saddle- 
like ridge expanding in front and behind. 
The sides of the vertebral arch, at their forepart, exhibit a vertically elliptical 
concave facet for articulation with the head of a rib. The abutment of the arch . 
measures twenty-three lines wide. The spinal foramen is subcordate, widest above, 
and measures fifteen lines in height and width. rh 
Four dorsal vertebra, represented in Figs. 5-8, Plate XII, from the middle of 
the series, have their body ot the same form as the specimen just described, but the 
extremities exhibit a less prominent convexity in front, and a shallower concavity 
behind. They vary a little in size, and slightly in other characters. Their body, 
