Online Encyclopedia

QAAAA

Online Encyclopedia
Originally appearing in Volume V23, Page 141 of the 1911 Encyclopedia Britannica.
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QAAAA  . Scapular

arch
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external to ribs; two
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longitudinal
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post-orbital bars (paroccipital arch distinct) (Archosauria). a . A supramastoid bone . Ribs two-headed ; a clavicle and interclavicle ;
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acetabulum closed; no obturator foramen; ambulatory; vertebrae amphicoelous . Order 7, PELYCOSAURIA . aa . No supramastoid . 1 Proc . Amer . Assoc. for the
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Advancement of Science, loth meeting (Cambridge, 1871, 8vo), pp . 230 sq.; Amer . Naturalist (1889), vol.
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xxiii. p .

863 . 2

Syllabus of Lectures on the
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Vertebrata (
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Philadelphia, 1898, 8vo), P . 54.141 Ribs two-headed; interclavicle not distinct; external digits greatly elongated to support a patagium for
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flight . Order 8, ORNITHOSAURIA . Ribs two-headed; no interclavicle; acetabulum open; ambulatory . Order 9, DINOSAURIA . Ribs two-headed; an interclavicle; acetabulum closed; ambulatory . Order 1o, LORICATA . Ribs one-headed; an interclavicle; acetabulum closed, a large obturator foramen; ambulatory .

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