. Bulletin. Natural history; Natuurlijke historie. OSTEOLOGY OF DEINONYCHUS ANTIRRHOPUS 23 medial to the quadrate cotylus the fifth process extends medially and forward to contact the parietal. Without the adjacent bones, it is impossible to record the exact size and shape of the temporal fenestrae. However, the shape of the squamosal indicates a supe- rior temporal fenestra of at least moderate size. The lateral fenestra was quite deep dorsoventrally and may have been slightly restricted from behind at about mid- height, as it is in nearly all "carnosaur" skulls. Without knowledge o
. Bulletin. Natural history; Natuurlijke historie. OSTEOLOGY OF DEINONYCHUS ANTIRRHOPUS 23 medial to the quadrate cotylus the fifth process extends medially and forward to contact the parietal. Without the adjacent bones, it is impossible to record the exact size and shape of the temporal fenestrae. However, the shape of the squamosal indicates a supe- rior temporal fenestra of at least moderate size. The lateral fenestra was quite deep dorsoventrally and may have been slightly restricted from behind at about mid- height, as it is in nearly all "carnosaur" skulls. Without knowledge of the quad- rate, however, the precise shape is in doubt. JUGAL Both jugals are known from skull YPM 5232 and the left jugal, complete and uncrushed, was recovered from skull YPM 5210 (Fg. 10). The jugal is a thin plate. FIG. 10. Right jugal of Deinonychus antirrhopus, YPM 5210, in lateral (A) and medial (B) views. Abbreviations: ect—articular scars of ectopterygoid; la and la?—lachrymal contact with jugalr ma—articular area of maxilla; po—articulation area of post-orbital; qj—articulation area of 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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