40 
APPENDIX. 
support than Hadrosaurus, appears probable. Large coprolites of the 
character ot those of herbivorous animals accompanied the bones. They 
resemble somewhat those ot the hog ; one has a diameter of four inches 
one way, and 24 inches the other ; extremity broad, obtuse. The probabla 
form of the ungual phalanges, points also to the same habit. The proprie- 
tor of the pit told the writer that he had more than once seen large 
“hoofs” and “ wide toe-joints ” taken out during the excavation. 
This species is different from the Ornithotarsus immanis, Cope, and 
belongs to a different genus. The shaft of the tibia in the latter is tilled 
with cancellous tissue; in the present animal it is entirely hollow’. 
From the marl pits of James King. 
HADROSAURUS. Leidy. 
HADROSAURUS TRIPOS. Cope. 
At a point about ten miles distant from the marl pit in which the Hyp- 
sibema was found, Prof. Kerr discovered a caudal vertebra of a colossal 
reptile, whose affinities are evidently near to the Hadrosaurus foulkei. 
This vertebra is one ot the distal, as evidenced by the entire absence 
of any trace of diapophysis, and its subquadrate longitudinal section, as 
well as by the small size of the neural arch and spine. At first sight it 
would appear to occupy a position betw’een the thirtieth and thirty-sixth 
of the series ; the former in H. foulkei has, however, rudiments of a dia- 
pophysis. Both its articular faces are distinctly biconcave. The large 
size ot the chevron articular face is as in the thirtieth, and the concavity of 
its lateral faces as in the tw r en ty -sixth ; in the thirty sixth the sides are 
entirely plane. The round form of the neural canal, as well as the lack 
of diapophyses, are points of resemblance to the thirty-sixth, but it is more 
than twice as long as that vertebrae in the H. foulkei. In the thirteenth 
the neural is somewhat depressed and becomes more so as v r e advance to- 
wards the proximal part of the series. The small an tero-posterior extent 
of the neural arch is much as in the thirtieth in H. foulkei, but the basis ot 
the neural spine, which is broken off' in this, as well as the old species, is 
much more slight. It is so very thin and weak as to indicate either a 
comparatively 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 
II. foulkei, but is above the middle in the thirtieth and those anterior. 
