APPENDIX. 
4i 
Measuremen ts. 
In. Lin. 
Depth centrum to summit chevron articulation, 5 
do. from neural canal without chevron face, 4 
Greatest width do., 4 9 
Length centrum, 4 3 
do. neurapophysis, 2 6 
Width between anterior zygapophyses, 1 3 
do. of arch above, 1 6 
do. neural canal, 10 
Depth do. do., 10 
do. basis nural spine, 5 
This specimen was procured from the marl pit of W. J. Thompson, 
Sampson county, North Carolina. 
A second and much smaller vertebra from the pit that furnished the 
remains of Hypsibema crassicauda, belonged to a third individual, and 
possibly to this species. Its proportions would point to a position near 
the end of the tail, and its form is less elongate and compressed than those 
in that position in H. foulkei. Its neural arch is not co-ossified. The 
extremities are slightly concave, the general form subquadrate. 
Lines. 
Length of centrum, 
20.5 
Diameter extremity, (vertical) 
18. 
u “ (transverse) 
21.5 
“ middle, 
15. 
The first named vertebra pertained to an immense species, perhaps 
double the Iladrosaurus foulkei in weight and bulk, should the general 
proportions of the two have been at all similar. In that case the length 
of the femur would be sixty-two and a quarter inches. 
PYTHONOMORPHA. 
?Poltgonodon rectus. Leidy. Emmons’ Geol. Survey N. C. 1856, 
218. 
Duplin county and Cape Fear River. 
Liodon sp. Macrosaurus sp. Emmons b e. 
Mosasaurus crassidens, Marsh in Cope’s Synopsis Bat. Rept. 1ST. Am. 
Trans. Soc. Philos. 1869, 198. 
AYES. 
Catarrhactes antiques, Marsh Sill. Amer. Journ. Sci. Arts, 1870, 213. 
Tarboro’, Edgecombe county, N. C. 
6 
