. Bulletin. Natural history; Natuurlijke historie. Fig. 37. The left radius of Stylinodon rnirus, YPM 11096. a) Anterior view, b) Posterior view. Abbreviations: ca = articular surface for capitulum of humerus; da = distal articular surface for carpals; h = head; n = neck; s = styloid process; ta = articular surface for trochlea of humerus; u = surface for ulna. Scale is 4 cm long. tween the individuals represented. It may also be possible that late Bridgerian stylinodontids were, on the average, larger and more robust than the late Wa- satchian stylinodontids. The general characters of the man
. Bulletin. Natural history; Natuurlijke historie. Fig. 37. The left radius of Stylinodon rnirus, YPM 11096. a) Anterior view, b) Posterior view. Abbreviations: ca = articular surface for capitulum of humerus; da = distal articular surface for carpals; h = head; n = neck; s = styloid process; ta = articular surface for trochlea of humerus; u = surface for ulna. Scale is 4 cm long. tween the individuals represented. It may also be possible that late Bridgerian stylinodontids were, on the average, larger and more robust than the late Wa- satchian stylinodontids. The general characters of the manus of Stylinodon have been described pre- viously by Gazin (1952) and Patterson (1949b). The three middle digits are stout and robust with greatly enlarged, transversely compressed, recurved claws. The proximal and medial phalanges are little more than short, squat wedges. Meta- carpal five is reduced to vestigial in both USNM 18425 and FMNH PM 3895. In neither specimen is it clear that the phalanges of the fifth digit were present. They are not preserved in USNM 18425, and only a small, spherical, circular bony element (sesamoid?) that may have articulated with the fifth metacarpal is preserved in FMNH PM 3895. Likewise, the first metacarpal (and thus, the digit) was probably greatly reduced or vestigial, but is not preserved in any of the specimens. Distally and ventrally the three central metacarpals bear pairs of large, ovoid sesamoids. Lunar Seen dorsally, the lunar is elongated mediolaterally and five-sided. The distal facets for the magnum and unciform are set at an angle of approximately thirty degrees to one another. Proximally, it bears a large, ovoid, smoothly convex (in both directions) articular facet for articulation with the distal end of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original w
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