File:Nature (1910) (14762894022).jpg

Identifier: nature841910lock (find matches)
Title: Nature
Year: 1869 (1860s)
Authors: Lockyer, Norman, Sir, 1836-1920. edt
Subjects: Science Science Sciences Biologie Physique Natuurwetenschappen CIENCIA NATURAL HISTORY BIOLOGY SCIENCE
Publisher: (London, etc., Macmillan Journals Ltd., etc.)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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tebrte (Fig. i). Prof. Osborn,who describes this specimen, is careful to explainexactly on what material the various parts of the recon- July 7, 1910) NATURE 13 struction are based, so that each may judge of theextent to which it is trustworthy. Perhaps the most interesting real novehy is a smallskeleton from the Middle Eocene of Wyoming, deter-mined by Prof. Osborn to belong to a primitivearmadillo. Fragments of this animal were obtainedsome vears ago by Dr. J. L. Wortman, and ascribedby him to a Lemuroid under the name of Meta-cheiromys. Four good specimens now seem to showthat it is truly an armadillo, differing chiefly from thetypical existing armadillos in the probable presenceof a leathery instead of a bony shield, of an enamelcovering on the single large caniniform teeth in theupper and lower jaws and the degeneration of otherteeth. This discovery confirms the suppositions ofMarsh, Wortman, and Schlosser as to the existenceof Edentata in North .\merica in the Eocene period; jm.
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1 of Tyra. and it adds to the difficulties of understanding theearlv Tertiary mammal faunas of South .\merica. .Vnother astonishing discovery is that of a colossalcarnivorous Dinosaur, Tyrannosaurus (Fig. 2), fromthe Upper Cretaceous (Laramie formation) of Wyo-ming and Montana. It has hitherto been supposed thatthe flesh-eaters were all much smaller than thelargest vegetable-feeders among Dinosaurs; but hereis a reptile like Megalosaurus, with a skull from4 to 5 feet in length, and when standing on its heavyhindquarters reaching a height of from 16 to 17 feet..Another new herbivorous Dinosaur, Ankylosaurus,from the same geological formation, measures 14 feetin length, and is armoured like the South AmericanGlyptodons. The technical papers on remains of horses andrhinoceroses, by Prof. Osborn and others, and oncamels and deer, by Dr. Matthew, are of extremescientific value. The discussion of the extinct horsesis especially exhaustive, and the result is that it be-comes impossible at pr

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