. Animals before man in North America; their lives and times. Paleontology. Animals Before Man to the aj)pareiit average size of extinct animals, for tlie great majority of fossil vertebrates are bound from the nature of things to be large, or above the average, so that there is a very general tendency to think of the animals of past ages as much larger than they really were. Placed usually with the anomodonts is a group of reptiles from the Permian of Tex- as, distinguished by the great heio^ht of the individual sec- tions of the back-bone. The ridge over the shoulders of a horse and the hump
. Animals before man in North America; their lives and times. Paleontology. Animals Before Man to the aj)pareiit average size of extinct animals, for tlie great majority of fossil vertebrates are bound from the nature of things to be large, or above the average, so that there is a very general tendency to think of the animals of past ages as much larger than they really were. Placed usually with the anomodonts is a group of reptiles from the Permian of Tex- as, distinguished by the great heio^ht of the individual sec- tions of the back-bone. The ridge over the shoulders of a horse and the hump of a buf- falo are formed by the very long processes of the back-bone. But long as these are they are greatly exceeded by the pro- cesses on the vertebrae of Di- metrodon and Naosaitrns, which must have formed an enormous ridge or keel along the back; furthermore, in Naosaurus each process bore a series of cross-bars, like the arms on a telegraph pole, standing out at right an- 132. A vertebra of Na- osaurus, one of the 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, D. Appleton and company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaleont, bookyear1902
