HOLLAND AND PETERSON: OSTEOLOGY OF THE CHALICOTHEROIDEA. 221 
evidently represent an animal of considerably larger size than WM. oregonensis, an 
animal in fact quite equal in size to M. elatus, if not surpassing it. These remains 
come from a later geological horizon than those originally described by Leidy and 
by Marsh, the Virgin Valley Beds belonging according to Merriam to the Middle 
Miocene. 
2. M. jdistans Marsu, American Journal of Science and Arts (3), Vol. XIV, p. 
249-250 (Sept. 1877).—Peterson, ‘‘ Preliminary Notes on Some American 
Chalicotheres,’’ American Naturalist, XLI, pp. 733-752 (1907). 
Type: Codossified first and second phalanx, median phalanx, and cuboid (the 
latter identified as such by Peterson, l. c.). (Cf. Fig. 6, p. 220.) 
Location of Types: Peabody Museum, Yale University. 
Geological Horizon: John Day Beds, Oregon (Lower Miocene). 
““Moropus distans, gen. et sp. nov. 
“This genus of Edentates is based mainly upon the bones of the feet, which 
have been found in several individuals. These remains are quite different from 
the feet bones of any of the American Edentates, recent or fossil; but indicate 
affinities with the extinct Ancylotherivum, from the Tertiary of Europe, which is 
supposed to be related to the American Ant-bear (Orycteropus). The specimens 
here described belong to a distinct family, the Moropodide. 
“In the type specimen of the present species, only the hind feet appear to be 
represented. One of the most characteristic bones is a coossified first and second 
phalanx. The articulation for the metatarsal is nearly in a horizontal plane, and 
situated on the proximal end of the upper surface of the base. It is somewhat 
heart-shaped in outline with the apex rounded and about equally concave in both 
directions, or slightly less so transversely. This articulation occupies nearly half 
the length of the first phalanx which is thoroughly codssified with the second. 
The line of junction between the bones can, however, be traced easily, and is 
strongly marked on the under surface by a pit or foramen entering obliquely 
upwards and forwards. Except near this line of junction, the surface of the bone 
is rather smooth. ‘The under surface, below the articulation, is flattened. The 
second phalanx is less than half the length of the first, and its surface is roughened, 
as if by abnormal growth of bone over the surface. The length of the first phalanx 
is 43 mm.; the longitudinal diameter of the matacarpal articulation 18 mm.; its 
transverse diameter 23 mm. ‘The least transverse diameter of the bone is 21 mm.; 
its vertical diameter at the middle is 20 mm. The second phalanx is broken in 
this specimen, its distal articular face being absent. 
