. Animals of the past; an account of some of the creatures of the ancient world. Paleontology. 66 ANIMALS OF THE PAST r^ M. Stages in the Development of Flight Tetrapteryx, Archaeopteryx, Hypothetical Stage, Modern Bird. After Beebe. the Tetrapteryx or four-winged stage. At this stage, to quote from Mr. Beebe, " flight was merely gliding, the fingers were too free, the arm bones too delicate, the sternum small or absent, and these facts considered in connection with the small, weak pelvis, make it impos- sible to picture the creature as flying skilfully Please note that these imag
. Animals of the past; an account of some of the creatures of the ancient world. Paleontology. 66 ANIMALS OF THE PAST r^ M. Stages in the Development of Flight Tetrapteryx, Archaeopteryx, Hypothetical Stage, Modern Bird. After Beebe. the Tetrapteryx or four-winged stage. At this stage, to quote from Mr. Beebe, " flight was merely gliding, the fingers were too free, the arm bones too delicate, the sternum small or absent, and these facts considered in connection with the small, weak pelvis, make it impos- sible to picture the creature as flying skilfully 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 Lucas, Frederic A. (Frederic Augustus), 1852-1929. New York
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Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaleont, bookyear1922
