The front part of the trochlear faces for the patella are gone in our specimen.
Measurements of Femur.
| M. | |
| Greatest distal diameter across condyles | ·178 |
| Length of condyles | ·079 |
| Transverse diameter of shaft six inches above distal end | ·121 |
The Tibia ([Plate VIII.], Fig. 2).—The tibia is short, straight, and simple, slender in the middle, but much expanded at the extremities. The proximal end is especially massive, with deeply concave articular faces; the internal cotylus is the larger, and has its greatest diameter fore-and-aft, directly at right angles to the greatest diameter of the external.
The cotyli are separated by a smooth ridge, that is highest at its posterior termination. The tuberosity is high and massive, with a wide depression on its top for the reception of the ligament of the patella; the sides are deeply pitted by venous foramina. A section of the shaft at the lower part of the tuberosity would be subtriangular; while below it becomes more cylindrical, as it becomes smaller, reaching its shortest diameter about three fifths down the shaft. Below this it expands and forms the large subcircular distal end. The articular face is concave, with a slight, smooth ridge running fore-and-aft on its internal side. The malleolus is broad and low.
The fibula is distinct, but very slender; its proximal end has a small circular face, which articulates with the tibia on a facet developed on the bottom of a projection of the tuberosity; the distal end is much flattened, but enters into the ankle-joint.
Measurements of the Tibia.
| M. | |
| Transverse diameter of proximal articulation | ·158 |
| Longitudinal diameter of proximal articulation | ·123 |
| Smallest circumference of shaft | ·16 |
| Greatest distal circumference above the articular face | ·308 |
| Diameter of distal articulation longitudinally | ·082 |
| Diameter of distal articulation transversely | ·130 |
| Width of tuberosity below pit for ligament of the patella | ·075 |
Uintatherium princeps, sp. nov.