. Bulletin. Natural history; Natuurlijke historie. 90 PEABODY MUSEUM BULLETIN 30. FIG. 54. Right scapula of Deinonychus antirrhopus (AMNH 3015) in lateral view; ac—acromial process or deltoid border. ness of mm and a fore-aft length of 46 mm at the upper margin of the glenoid. The acromial process or deltoid border is not greatly expanded an- teriorly. Although imperfectly preserved, the glenoid appears to have been an unusually deep notch, the orientation of which can only be approximated, but which appears to have faced anteroventrally and outward. Presumably the scapulo-coracoid suture
. Bulletin. Natural history; Natuurlijke historie. 90 PEABODY MUSEUM BULLETIN 30. FIG. 54. Right scapula of Deinonychus antirrhopus (AMNH 3015) in lateral view; ac—acromial process or deltoid border. ness of mm and a fore-aft length of 46 mm at the upper margin of the glenoid. The acromial process or deltoid border is not greatly expanded an- teriorly. Although imperfectly preserved, the glenoid appears to have been an unusually deep notch, the orientation of which can only be approximated, but which appears to have faced anteroventrally and outward. Presumably the scapulo-coracoid suture passed through its center. In general, the scapula is most like that of Ornithomimus with its long, narrow, parallel-edged blade. It differs from the typical theropod scapula in the apparent absence of any significant distal expansion of the blade and the unusually small size of the acromial process (deltoid border) above and an- terior to the glenoid. Both of these features may be correlated with reduction of the scapular deltoid musculature which in part is involved with humeral extension (recovery). CORACOID Only a small part of the left coracoid is preserved in AMNH 3015, representing the ventral margin of the glenoid. No other evidence exists pertaining to its size, shape or the nature of its junction with the scapula. FORELIMB HUMERUS Both humeri are known in AMNH 3015, although neither is 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 Peabody Museum of Natural History. New Haven : The Museum
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