232 MEMOIRS OF THE CARNEGIE MUSEUM. 
8. M. hollandi Pererson, Science (New Series), Vol. XX XVIII, p. 673 (1918). 
Type: Radius, ulna, and portion of fore foot, femur, tibia, fragment of fibula, and 
portions of both hind feet.1° (No. 1424 Catalog Vert. Foss. Carnegie Museum.) 
Specific Characters: Limbs slenderer than in M. elatus or M. peterson. Third 
trochanter of femur less developed than in the latter species. Facet for the trapezium 
on the scaphoid much reduced or wanting. Facet for trapezium on trapezoid not 
extending down to the lower face of the trapezoid as in M. elatus and M. petersoni; 
the heavy protuberance on the dorso-radial angle of the trapezoid (found in elatus 
and petersoni) absent. Facet for trapezium on Me. II wanting. Metacarpals pro- 
portionally long and slender. Proximal and medial phalanges of second digit of 
manus more compressed laterally than in M. elatus or M. petersoni. Animals larger 
than a tapir, but smaller than M. elatus. 
Ita. 11. Anterior view of left manus of M. hollandi Fic. 12. Postero-radial view of scaphoid, trape- 
Peterson. Xi. zoid and Me. II of M. hollandi (1) compared with 
the same bones of M. elatus (2). X#. 
Geological Horizon: Upper Harrison Beds, Western Nebraska near Wyoming 
State-line (Middle Miocene). 
The olecranon process of the ulna is short and heavy, as in the Chalicotheres 
generally. Distally the radius and ulna are rather slender and very much elongated. 
1° This material was discovered in 1901 and partially described by O. A. Peterson (Ann. Car. Mus., Vol, 
IV, pp. 60-61, 1906) under M. elatus. The description here given amplifies the original. 
