. Bulletin. Natural history; Natuurlijke historie. FIG. 4. Restoration of the skull and mandible of Deinonychus antirrhopus. Dark stippling indi- cates known elements, light stippling indicates unknown parts. Based on elements from at least two skulls, so proportions are only approximate. Notice the two small anterior antorbital fenes- trae and the relatively large external mandibular fossa. Abbreviations: ang—angular; aof—antorb- ital fenestra; ar—articular; de—dentary; emf—external mandibular fossa; en—external naris; ju—jugal; la—lachrymal; Itf—lateral temporal fenestra; ma—maxilla; na—nasa
. Bulletin. Natural history; Natuurlijke historie. FIG. 4. Restoration of the skull and mandible of Deinonychus antirrhopus. Dark stippling indi- cates known elements, light stippling indicates unknown parts. Based on elements from at least two skulls, so proportions are only approximate. Notice the two small anterior antorbital fenes- trae and the relatively large external mandibular fossa. Abbreviations: ang—angular; aof—antorb- ital fenestra; ar—articular; de—dentary; emf—external mandibular fossa; en—external naris; ju—jugal; la—lachrymal; Itf—lateral temporal fenestra; ma—maxilla; na—nasal; or—orbit; pm —premaxilla; po—postorbital; qj—quadratojugal; qu—quadrate; sa—surangular; sq— FIG. 5. Restoration of the palate of Deinonychus antirrhopus, based upon disarticulated elements from at least two skulls. Dark stippling indicates known elements, light stippling unknown regions. Proportions are only approximate. Abbreviations: ect—ectopterygoid; in—internal naris; iptv—interpterygoidal vacuity; ju—jugal; ma—maxilla; pal—palatine; pf—palatine fenestra; pm —premaxilla; pt—pterygoid; qj—quadratojugal; spf—subsidiary palatine fenestra; stf—subtem- poral fossa; v—vomer. is moderately long, approximately 300 to 320 mm, with moderate to large-sized or- bits (probably oval) and lateral temporal fenestrae. Three antorbital fenestrae are. 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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