122 The American Naturalist. [February, 
ond phalanges as Moropus (species distans, senex and elatus). 
The first undoubted remains of Chalicotherium in this country 
were found by Garman in the Loup Fork (upper Miocene) and 
described by Scott and Osborn. Cope has also described a 
lower Miocene species (C. bilobatum) from the White River — 
beds (Swift Current Creek) of Canada. It is not improbable 
that Moropus belongs to the same types. 
Nomenclature and Synonomy. Depéret advocates an impor- 
tant modification -in our nomenclature. He believes that the 
Eppelsheim type, to which the name Chalicotherium was origi- 
nally applied, can be identified by the form of its phalanges 
- with the Pikermi type (Ancylotherium Gaudry), and is, there- 
fore, distinct from the Sansan type. For the latter he proposes 
to retain the name Macrotherium Lartet. If this proves to be 
correct these types should be distinguished as follows: 
Middle and Lower Miocene. 
Upper Miocene, Lower Pliocene. 
(Sansan, Grive St. Alban, ? Phos- eens 
phorites. 
(Eppelsheim, Pikermi.) 
es.) 
Macrotherium. — Chalicotherium. 
Syn.: Anisodon, ? Schizotherium, Syn.: Ancylotherium. 
! Moropas. Quadrupedal. Heavy skeleton. 
Semi-arboreal and fossorial. Light 
skeleton. Fore-limb greatly elonga- 
ted. Radius (= .70), tibia (= .29). 
Radius with large external, and 
small internal, fossa for humerus. 
Fore- and hind-limbs nearly equal. 
Radius and tibia of nearly same — 
size; of heavy proportions. Radius 
with subequal external and internal — 
fosse of humerus. Ulna coalesced 
Ulna distinct or very slightly coal- with radius. 
esced with radius distally. 
While many striking differences separated these two type — 
especially in the proportions of the limbs, the teeth were sub- — 
stantially similar. A strong family relationship is also exhib- — 
ited in a peculiarity of the feet pointed out by Gaudry, namely; — 
the proximal phalanges were retracted and not the distal, while - ’ 
in the cats the distal phalanges are retracted and in the edentates — 
the phalanges are not retracted at all but are flexed. In the a 
edentates the foot is thrown upon its outer side; in the Chali- — 
cotheriide this was only partly the case. i a 2 
