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Books Books 1 - 1 of 1 on ... ancestor is an entirely different proposition, but if such be the case we must....
" ... ancestor is an entirely different proposition, but if such be the case we must go far back in time to seek for this hypothetical form. And it must ever be borne in mind in dealing with birds that our knowledge of early forms is extremely slight, so... "
Notes on the Osteology and Relationship of the Fossil Birds of the Genera ... - Page 550
by Frederic Augustus Lucas - 1903
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Proceedings of the United States National Museum, Volume 26

United States National Museum - Science - 1903
...knowledge of early forms is extremely slight, so that we have a very small foundation of facts for a very large edifice of theory, a pyramid resting on its...little better than speculation. HARGERIA, new genus. Ilesperornix gracills differs so much from its larger relative that it should be placed in a distinct...
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