iia OE 
y, (9) 
1872. ] 421 [Cope. 
‘stated by Seeley to be found in the species of his genus Ornithochirus. 
As it is not likely on other grounds that the species of the Niobrara cre- 
taceous strata belong to the genus Pterodactylus of Cuvier, which is 
chiefly known from the Jurassic period, I place the Kansas species for 
the present in Ornithochirus, as established by Seeley. 
ORNITHOCHIRUS UMBROSUS. Cope. 
Represented by the distal portion (ten inches) of the wing finger meta- 
carpal ; the proximal portion (eight inches) of the first phalange of the 
same digit, with two phalanges of claw-bearing digits. The distal con- 
dyles of the first named bone are separated by the usual deep groove above 
and below, and wind separately to their terminations on the inferior face. 
The narrow base which supports the inner condyle is bounded posteriorly 
by an acute edge ; directly outside of the base of this ridge is a deep 
groove or foramen, which is bounded next the external condyle by an- 
other ridge which rises to the base of the inner condyle on the trochlear 
side. The transverse diameter of the condyle is M. 0.043 or 17 lines. 
The proximal end of the first phalange is perfect, but flattened by pres- 
sure. It presents the two usual cotyloid cavities well separated by an 
elevated ridge. Anteriorly, it presents an elevated crest for muscular 
insertion. This terminates abruptly, and is followed distally by a deep 
notch. Distal to this is another prominence of the bone also probably an 
insertion. Antero-posterior diameter (flattened), 24 lines. 
The claw phalange is short and wide ; both its articulations are simple 
and concave. Both outlines are keeled, one very strongly at one end, 
and at the other presenting beyond the articular surface, a wide pro- 
longed process for muscularinsertion. Length phalange without process, 
thirteen lines; process, four lines; diameter, widest extremity, eleven 
lines. This indicates a very stout digit. The other digit is penultimate, 
and is remarkable for its small size, perhaps indicating an external rudi- 
mental digit. It is only supposed to belong to the anterior limb, from its 
having been found with the preceding bones. It is more slender than 
the other, and differs in having convex distal articulation, divided by a 
trochlear groove, and the concave proximal one in like manner divided by 
a trochlear carina. Length, nine lines ; proximal depth, three lines. 
This species is the largest Pterodactyle as yet known found on our con- 
tinent, the end of the wing metacarpal exceeding in diameter that of the 
species described by Professor Marsh, from the same region, by 4. lines. 
From near Butte Creek, from the yellow chalk. 
ORNITHOCHIRUS HARPYIA. Cope. 
Established on wing metacarpals and phalanges of three individuals. 
The articular extremities indicate a species from one-half to two-thirds 
the size of the last named. Those of the metacarpal are very prominent 
above as well as below, and there is no distinct ridge in the trochlear 
groove between them. The inner condyle does not stand ona base with 
an acute posterior ridge, but overhangs a rather obtusely-edged support. 
