HOLLAND AND PETERSON: OSTEOLOGY OF THE CHALICOTHEROIDEA. Zao 
Naturalist, Vol. XLI, pp. 733-752 (1907).—Holland, Science (New Series), 
Vol. XXVIII, p. 809 (1908).—Osborn, Bulletin American Museum Natural 
History, Vol. XXXII, p. 263 (1913). 
Synonym: Moropus cooki Barbour, Nebraska Geol. Survey, Vol. III, pt. 2, p. 1 
(1908). 
Type: A number of the bones of the feet and a patella.” 
Neotype: Articulated skeleton and great assemblage of other material. 
Location of Types: Peabody Museum, Yale University. 
Location of Neotype: Carnegie Museum, Pittsburgh. 
Geological Horizon: Lower Harrison Beds, Nebraska (Lower Miocene). 
Specific Characters: Supraorbital ridges nearly meeting to form a low sagittal crest; 
interparietal subtriangular in outline; cervical vertebre massive; transverse 
= 
= 
=—— 
SS 
SSS 
SS 
ii 
Fic. 8. Part of type of M. elatus Marsh. 1-2, patella; 3-4, lateral and dorsal views of duplex bone; 
5, cuneiform of right forefoot. 4%. Drawn from Marsh’s types. 
process of the fifteenth dorsal having a great vertical diameter, and pierced 
by a foramen; anterior lumbar vertebre assuming the lumbar form some- 
what abruptly, and not retaining the features of the antecedent dorsals; neural 
spines of the lumbars and sacrals sloping but little backward; limbs and feet 
relatively heavy; fore and hind limbs subequal in length; scapula broad and 
comparatively short; facets for trapezium on scaphoid and on metacarpal 
II well indicated; metapodials relatively long and not expanding rapidly at 
their distal extremities; animal as large or larger than an African rhinoceros. 
10 In 1906 Peterson placed the genusand species upon a firm basis by a comparative study of the types 
in the Peabody Museum and the collections acquired by the Carnegie Museum. 
