OTA 
1871.] . LO [Cope. 
size of the chevron articular face is as in the thirtieth, and the concavity 
of its lateral faces as in the twenty-sixth; in the thirty-sixth the sides 
are entirely plane. The round form of the neural canal, as well as lack 
of diapophysis, are points of resemblance to the thirty-sixth, but it is 
more than twice as long as that vertebra in the H. foulkei. In the thirtieth 
the neural canal is somewhat depressed and becomes more so as we 
advance towards the proximal part of the series. The small antero-pos- 
terior extent of the neural arch is much as in the thirtieth in H. foulkei, 
but the basis of the neural spine, which is broken off in this, as well as 
the odd species, is much more slight. It isso very thin and weak as to 
indicate either comparatively a slight development of the spine, or a 
very posterior position in the series. A weak lateral ridge marks the side 
of the centrum, which is below the middle line. It holds the same position 
in the thirty-sixth in H. foulkei, but is above the middle in the thirtieth 
and those anterior. 
Measurements. In. Lines, 
Depth centrum to summit chevron articulation... 5 
‘© from neural canal without chevron face... 4 
Greatest width “ Me es soa & 9 
Length centrum.......... wes CAL ae Somes lees fe 3 
Gs: MCULADODUYSIS cies cua s ye Mee 2 6 
Width between anterior zygopophyses........... 1 3 
SU OL AUCH ADONO: co0e ose ae ve ce ee ae u 6 
Soleo ueutaleCatak 6 a oe fe pasenis 10 
Depth ia Seles oe . ; : 10 
5 
‘* basis neural spine, . 
This specimen was procured from the marl pit of W. J. Thompson, 
Sampson Co., N. 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 codssified. The 
extremities are slightly concave, the general form subquadrate. 
Lines. 
Length of centrum...... godt iate Cokes seveeee 20.5 
Diameter. extremity, (vérticak) oi .s.ussc. lial fer. UES 
™ ae (transverse) 3.4. x. Sui est Sis 21.5 
3 middle o S Peeeey JG Med NSes SEE. Goi, 
The first named vertebra pertained to an immense species, perhaps 
double the Hadrosaurus 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. 
It will remain for future discovery to determine whether the species is 
the same as the Ornithotarsus immanis. 
