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Protoreodon Oreonetes Merycoidodon Limnenetes Eporeodon Mesoreodon Promerycochcerus Merycochoerus Pronomotherium Merycoides Phenacoccelus Ticholeptus Merychyus Leptauchenia Cyclopidius Upper Eocene (Uinta) Lower Chadron Genera <strong>of</strong> Oreodonts, their Respective Geologica AGE SKULL BULLAE | POSTPTERYGOID PROCESS Upper Chadron to Middle Oligocene Lower Chadron Middle Oligocene to Lower Miocene Lower Miocene Lower to Middle Miocene Upper Harrison to Middle Miocene Upper Miocene to Pliocene Lower Miocene Lower Miocene Lower Miocene to Pliocene Lower Miocene to Pliocene Upper Oligocene to Middle Miocene Lower Miocene to Middle Miocene mesocephalic; open orbit mesocephalic; open orbit mesocephalic; closed orbit mesocephalic; open orbit mesocephalic; closed orbit dolichocephalic; closed orbit dolichocephalic; closed orbit brachycephalic; closed orbit brachycephalic; closed orbit dolichocephalic; closed orbit mesocephalic; closed orbit mesocephalic; closed orbit brachycephalic; closed orbit brachycephalic; closed orbit brachycephalic; closed orbit 18 tiny tiny tiny large medium large medium large large medium large small, cylindrical medium large large large large enormous enormous moderately oval small and oval moderately oval small and oval moderate and ova small, oval anc long stout, oval and short very wide and flattened wide and flattened moderate and oval large and oval wide and flattened small and flattened tiny and flattened tiny and flattened
Iorizons and their Diagnostic Skull Characters ZYGOMATIC ARCH EXoCCIPITAL BONES I ANTORBITAL NASAL BONES PIT OR VACUrTY I~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ight supraocc. crest prolonged behind long neither ight ight ight ight ight ieavy and wide teavy and wide nedium and wide ight ight ight ight and fairly wide ight and very wide ieavy and very wide supraocc. crest moderate supraocc. crest prolonged behind occiput wide; crest not prolonged supraocc. crest high and prolonged supraocc. crest high and prolonged supraocc. crest high and prolonged supraocc. crest none supraocc. crest moderate supraocc. crest low, not prolonged pits supraocc. crest low, little prolonged pits supraocc. crest moderate, little prolonged supraocc. crest low, not prolonged pits behind occiput very broad occiput very broad 19 long long long long long long greatly shortened greatly shortened long long long long fused to maxilla fused to maxilla neither shallow pit pit pit pit pit pit pit pit pit and big vacuity vacuity pit and small vacuity enormous vacuity enormous vacuity
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Page 3 and 4: * BULLETIN OF THE AMERICAN MUSEUM O
Page 5 and 6: THE AMERICAN MUSEUM OF NATURAL HIST
Page 7 and 8: Scientific Staff ICHTHYOLOGY BASHFO
Page 9 and 10: CONTENTS OF VOLUME LI PAGE Title-pa
Page 11 and 12: Illustrations PAGE Merychyus elegan
Page 13 and 14: Illustrations PAGE Eryops, Sphenodo
Page 15 and 16: Illustrations PAGE Holops brevispin
Page 19 and 20: BULLETIN OF THE AMERICAN MUSEUM OF
Page 21 and 22: 1924] Loomis, Miocene Oreodonts in
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Page 35: 1924] Loomis, Miocene Oreodonts in
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Page 55: 1924] Loomis, Miocene Oreodonts in

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