PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA ZA 
The third metacarpal is no heavier than the second, though longer. The articu- 
lar facet for the magnum slants inwardly, but the radial border is not raised as 
in Daphenodon so as to form a transverse concavity, but instead it is very nearly 
plane transversely and evenly convex antero-posteriorly. On the radial side is a 
facet for Mc. II which is succeeded, posteriorly, by a deep sulcus, the palmar tuber- 
osity forming its posterior border. On the ulnar side the proximal end is ex- 
cavated in order to accommodate the head of Mc. IV and the articular facet for the 
unciform is concave due chiefly to the development of the dorso-ulnar angle of the 
head. The shaft is very slighty arched and transversely oval, due to the divergence of 
the metacarpals directly from the proximal end as in the mustelids generally. The 
trochlea is more symmetrical than that of Me. II. 
MEASUREMENTS. 
Unciform, greatest antero-posterior diameter... 
Unciform, greatest transverse diameter. . 
Unciform, greatest vertical diameter. 
‘Trapezoid, greafest antero-posterior diameter. 
Trapezoid, greatest transverse diameter 
Trapezoid) greatest vertical (ia meters :.r.cc..cssesocsee cots pavstisqcovessonsssvncdeveecs asks ie ttarsteruor ate eteietees 6 
Metacarpal I, greatest length... 
Metacarpal II, greatest length.. 
Metacarpal III, greatest length... 
Median phalanx, greatest length.. 
A proximal phalanx of the pollex or hallux has the proximal end much ex- 
panded, the shaft strongly arched and of considerable length, while the distal 
trochlea is confined principally to the plantar face. A median phalanx found with 
the specimen is much depressed, quite long, and does not indicate retractility ofthe 
ungual. 
Tue Hrnp Lis. 
The greater portion of the femur is preserved. The head is well rounded and 
sits on a long neck, as in Meles, Lawtra, and Gulo. The pit for the ligamentum teres 
is located on the posterior half near the lower border. Unfortunately the great tro- 
chanter, together with the upper portion of the shaft, is lost on its external side, while 
internally the shaft is preserved, showing a large lesser trochanter. On the lower 
half of the shaft the fibular border is produced into a very prominent ridge, which 
is even more pronounced than in Meles taaws or Gulo luscus and terminates below in 
a rugose tubercle similar to that of Canis. The lateral development of the shaft 
gives it the characteristic transversely broad appearance seen in Gulo luscus or Meles 
tazus. The rotular trochlea is shallow and broad, the condyles have great trans- 
