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MEMOIRS OF THE CARNEGIE MUSEUM. 
“Associated with the above specimen is a short bone evidently a median 
phalanx, with both articular surfaces well preserved and in form corresponding to 
each other. Proximally there are two grooves separated by an intermediate ridge, 
and distally two pulley-shaped ridges with a deep groove between. The length 
of the shaft of this bone is 23 mm.; its transverse diameter is 
21 mm. proximally, and 17 mm. distally. Near the center of 
the terminal pulleys is a deep pit on each side. The greatest 
vertical diameter of the bone is 32 mm. This bone resem- 
bles the penultimate phalanx of the middle finger of Priodontes, 
but is some what shorter and thinner. 
“These and other less characteristic remains indicate an 
animal somewhat larger than a tapir. They were found in 
ee, They teneror the Miocene of Oregon by the Yale Expedition of 1873” 
M. senex Marsh. Duplex. (Original Description of Marsh, lL. @)). 
bone. <3. Probably be- 2 : 
artim ia) Gteny TIL os 3. M. senex Marsu, American Journal of Science and Arts 
manus. (38), Vol. XIV, p. 250 (Sept. 1877).—Peterson, American 
Naturalist, Vol. XLI, pp. 733-752 (1907). 
Type: Codssified first and second phalanx. (Cf. Fig. 7.) 
Location of Type: Peabody Museum, Yale University. 
Geological Horizon: John Day Beds, Oregon (Lower Miocene). 
““ Moropus senex, sp. nov. 
‘““A second larger species of the same genus is indicated by a few remains, 
among which is the characteristic bone formed of the united phalanges. The 
proximal phalanx is considerably larger than the one above described. Its length 
is 52mm. The proximal articulation is oblique, and does not occupy more than 
one-third the upper surface of the bone. The median phalanx is well preserved, 
and measures 25 mm. in length. It is not united with the first phalanx in a line 
with the axis of that bone, but is inclined about 15° toward the sole of the foot. 
Its distal articulation is composed of two not very prominent pulley-shaped surfaces 
with a groove between” (Original Description by Marsh). 
4. Moropus elatus Marsu, American Journal of Science and Arts (3), Vol. XIV, 
pp. 250-251 (1877).—Scott & Osborn, Bulletin Museum of Comparative 
Zoology, Vol. XX, p. 99 (1890).—Zittel, Handbuch d. Palzontologie, Bd. IV, 
pp. 314-315 (1893).—Peterson, Annals Carnegie Museum, Vol. V; p. 60 (1906). 
—Idem., “Preliminary Notes upon Some American Chalicotheres,’’ American 
