. Description of new carnivores from the Miocene of western Nebraska. Carnivora, Fossil; Paleontology; Paleontology. PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA 249. Measurements of Calcaneum. Mm. Greatest length 67 Greatest transverse diameter 33 Length of tnber from sustentaculum to free end 40 Navicular.—The navicular differs from that of Daphamus by having a propor- tionally greater antero-posterior diameter, which is due almost entirely to the development of the palmar border in the Miocene genus. The tuberosity on the tibial face is also fully as prominent as in the Oligoc
. Description of new carnivores from the Miocene of western Nebraska. Carnivora, Fossil; Paleontology; Paleontology. PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA 249. Measurements of Calcaneum. Mm. Greatest length 67 Greatest transverse diameter 33 Length of tnber from sustentaculum to free end 40 Navicular.—The navicular differs from that of Daphamus by having a propor- tionally greater antero-posterior diameter, which is due almost entirely to the development of the palmar border in the Miocene genus. The tuberosity on the tibial face is also fully as prominent as in the Oligocene form, entirely un- (^ '' £12 like that in Canis, and is not dissimilar to what is found in the recent tiger or 4 r g lion. The palmar face is, as stated, greatly produced, and formed into a Ellllp^l/ ^df-% ', I'^Kfe large tuberosity, which, however, is not reduced transversely by the deep notches FlG-45- Navicular (right side) of d. superb™. Nat. , . ,, size. 1, dorsal view ; 2, superior view; 3, fibular view ; on the tibial and fibular sides as in La- ... , . , . „ .... , . 4, plantar view ; 5, inferior view ; 6, tibial view. rns, but presents a more nearly perfect triangular outline of the entire bone when viewed from above or below. On the fibular face are two small facets, one palmar and the other dorsal. The one lo- cated dorsally is sometimes wanting, but in the type it is faintly indicated and touches the lower portion of the facet on the proximal dorsal angle of the cuboid when extreme rotation takes place, while the palmar facet articulates with a cor- responding facet on the proximal palmar angle of the cuboid. The facet for the head of the astragalus is concave in the usual manner, while the facet for the en- tocuneiform is quite large and is not crowded posteriorly in the same degree as in Canis or Felis. Measurements of Naviculae. Mm. Greatest antero-posterior diameter 21 Greatest transverse diameter 24 Greatest vertical diameter 11 Entocufieiform. — T
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