. Description of new carnivores from the Miocene of western Nebraska. Carnivora, Fossil; Paleontology; Paleontology. PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA 239 and the articulation for the trapezium is broader. In comparative size the bone is very little smaller than in Daphcenus and consequently much heavier and longer than in Cards. On the ulnar face the rugosity for the ligamentary attachment to Mc. II is quite prominent and the tuberosity on the radial side of the head is as large proportionally as in recent cats, though the bone as a whole however, is, lighter and long
. Description of new carnivores from the Miocene of western Nebraska. Carnivora, Fossil; Paleontology; Paleontology. PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA 239 and the articulation for the trapezium is broader. In comparative size the bone is very little smaller than in Daphcenus and consequently much heavier and longer than in Cards. On the ulnar face the rugosity for the ligamentary attachment to Mc. II is quite prominent and the tuberosity on the radial side of the head is as large proportionally as in recent cats, though the bone as a whole however, is, lighter and longer than Mc. I of the pollex in the latter. The distal end has a well formed facet which is separated palmarly by a prominent keel. The shaft is slightly curved, so that the distal end points a little in the ulnar direction. Measurements of Metacarpal Fig. 35. Dorsal and Ra- dial Views of Left Metacar- pal I of D. supeibus. Nat. size. Greatest length 32 Greatest antero-posterior diameter of head 10 Greatest transverse diameter of head 11 Metacarpal II —While the actual length of the first metacarpal is equal to that in Canis the second, third, fourth, and fifth are much shorter. This gives a char- acteristically low and broad appearance to the manus, as in Meles or perhaps even more similar to that in Arcticfis. Thus the second and fifth are of subequal length and are considerably shorter than the third and fourth. The head of Mc. II has the antero-posterior diameter much greater than the transverse, which is due to the comparatively small extent in the ulnar direction of the flange which carries the facet for Mc. III. In the cats this flange is very prominent on Mc. II and III, and forms a more completely interlock- ing condition of the metacarpals than is seen in the present Fio. 36. Dorsal and Radial genus and in the recent clogs generally. The shaft is sub- Views of Left Metacarpal ii cylindrical in and strongly arched in the dor- of D. superbus. Nat. siz
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectpaleontology, bookyea
