78 IIADllOSAURUS. 



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 vcrtcbiic tliree appear to belong to the cervical series, seven to the dorsal 

 series, and the remaining eighteen to the caudal series. 



The three mutilated cervical vertebrse, 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 tlie sunimit, 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 Avith 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 vertebrae, but the corresponding 

 posterior concavity (Fig. 4, a) appears less deep, from the borders being bevelled 

 off outwardly. 



The sideis 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 Avidth. 



Four dorsal vertebriB, 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, 



