. The age of mammals in Europe, Asia and North America. Mammals, Fossil; Paleontology. 166 THE AGE OF MAMMALS coarse, fluviatile materials and contain but few fossils, including Dino- cerata, the rhinoceroses (Amynodon), and Triplopus (an excessively light- limbed hyracodont), the aberrant titanotheres Sphenocoelus and Metarhinus. The latter titanothere appears to be a dwarf and possibly aquatic or river- frequenting form, hence the specific name, M. fluviatilis. Upper Eocene, as Represented in the Upper Washakie and Middle and Upper Uinta. The Ludian Stage Upper Washakie : Eobasileus Zone. —
. The age of mammals in Europe, Asia and North America. Mammals, Fossil; Paleontology. 166 THE AGE OF MAMMALS coarse, fluviatile materials and contain but few fossils, including Dino- cerata, the rhinoceroses (Amynodon), and Triplopus (an excessively light- limbed hyracodont), the aberrant titanotheres Sphenocoelus and Metarhinus. The latter titanothere appears to be a dwarf and possibly aquatic or river- frequenting form, hence the specific name, M. fluviatilis. Upper Eocene, as Represented in the Upper Washakie and Middle and Upper Uinta. The Ludian Stage Upper Washakie : Eobasileus Zone. — In these famous beds, constitut- ing the Haystack Mountain, or Mammoth Buttes (Fig. 59) of Cope's. Fig. 66. — The Upper Eocene KohasUcus, the four-horned amblypod, last representative of its race. To the left a female, with small horns and tusks ; to the right a male with large horns and tusks. After original by Charles R. Knight in the American Museum of Natural History. descriptions, the archaic fauna is distinguished by the final evolution of the Amblypoda into giant specialized Dinocerata, including the extremely long-headed form, Eobasileus ( = 'Loxolophodon') of Cope.^ Eobasileus (Fig. 66) represents a distinct phylum of amblypods, as shown by the more posterior position of the front pair of horns and the consequent great elon- gation of the snout; in Tinoceras the front horns are more anterior in position, and the snout is thus relatively shorter, the proportions of the ' The type of the genus Tinoceras, namely, the species T. anceps is from the Upper Bridger, Sage Creek, Horizon C. The type of the species T. ingens is probably from the Lower Washakie. (W. D. M. 1909).. 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 Osborn, Henry Fairfield, 1857-1935. New York, The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectpaleontology, bookyea
