. Bulletin - United States National Museum. Science. OSTEOLOGY OF CAENIVOEOUS DINOSAUKS. 29 First antiorhital fenestra (/')•—The first antiorbital fenestra is of large size, beiag relatively larger than in either Tyrannosaurus or Ceratosaurus and by far the largest vacuity in the skull. Its upper boundary is formed ])y the lachrymal and maxillary, anteriorly bj* the maxillary, ventrally by the maxillary and jugal, and posteriorly by the descending branch of the lachrymal. Secoi^d antiorhital fenestra (/").—Tliis opening which is small, subcircular in •outline lies wholly within the maxill
. Bulletin - United States National Museum. Science. OSTEOLOGY OF CAENIVOEOUS DINOSAUKS. 29 First antiorhital fenestra (/')•—The first antiorbital fenestra is of large size, beiag relatively larger than in either Tyrannosaurus or Ceratosaurus and by far the largest vacuity in the skull. Its upper boundary is formed ])y the lachrymal and maxillary, anteriorly bj* the maxillary, ventrally by the maxillary and jugal, and posteriorly by the descending branch of the lachrymal. Secoi^d antiorhital fenestra (/").—Tliis opening which is small, subcircular in •outline lies wholly within the maxillary. Anterior nares ().—Tlie external narial openmg is elongate, oval in form and is bounded above by the nasal and premaxillary bones; anteriorly by the pre- maxillary; below by premaxillary and maxillary and posteriorly by the nasal and maxUlarj'. In this specimen it has a length antero-posteriorly of 118 mm.; a depth at the center of about 40 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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