PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA 230 
that the similarity is remarkably close. The dorsal face of the bone in the present 
genus has a less vertical diameter than in the Oligocene form, which is due to the 
fact that the articulation for the radius is carried further downward on the anterior 
face than in the older type, in fact lower than in the lion and tiger, consequently 
far removed from conditions in the recent dogs, in which the dorsal face of the 
scapho-lunar is very large, the bone being much higher throughout. 
The articular facet for the radius also 
extends far downwards on the palmar face 
near the ulnar angle, as in the lion and tiger, 
which indicates that there was even more power 
of flexure between these two bones (radius and 
scapho-lunar) in the present genus than in 
Dapheenus, and is a condition strikingly similar 
to what is seen in the large cats, The radio- 
palmar process is well developed, but has not 
the vertical diameter seen in Canis, and is 
more nearly like that in the cats. It is, how- 
ever, more distinctly separated, by a constric- : ‘ 
tion, from the main body of the bone than in it OLD EE Sipabegans 1s wore 
the felines, which is due to the greater devel- 3, radial view; 4, ulnar view ; 5, inferior view ; 
opment of the palmar face of the scapho- & Superior view. 
lunar in the latter. The ulnar face has no facet for the cuneiform, which is 
identical with that in Daphenus, in which the cuneiform and seapho-lunar did not 
come in touch with one another sufficiently to establish facets. Distally there are 
well defined facets for the unciform, magnum, trapezoid, and trapezium respectively. 
The facet for the unciform is deeply excavated as in Daphenus, while that for the 
magnum is extended downward somewhat less near the dorsal border, the beak of 
the lunar being less produced: downward in the present genus. The facet for the 
trapezoid is a large, irregularly shaped, and obliquely placed surface, indicating a 
trapezoid of considerable size. ‘The facet for the trapezium is located on the extreme 
radial angle, but is poorly demarcated from the facet for the trapezoid. 
MEASUREMENTS OF SCAPHO-LUNAR. 
Greatest antero-posterior diameter, including the radio-palmar process. 
Greatest transverse diameter. 
Cuneiform. — As in Daphenus the cuneiform is broad laterally, much depressed 
in the vertical direction, and has a large process which occupies the dorso-ulnar 
