File:The American Museum journal (c1900-(1918)) (18159625055).jpg

Title: The American Museum journal
Identifier: americanmuseumjo11amer (find matches)
Year: c1900-(1918) (c190s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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.1 nixosirn mimmy
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PORTION OF SKIN FROM TRACHODON MUMMY This roptile had neither scalis nor twny covering, but a thin epidiTinis made up ol' tubercles of two sizes, the larger size iiredoininating on surfaces exposed to tiie sun down the stream, and rapidly buried in a bed of fine river .sand intermingled with sufficient elements of clay to take a perfect cast or mold of all the epidermal markinji;s l)efore any of the e()idermal tissues had time to soften under the solvent action of the water. In this way tlie markins were indi- cated with absolute distinctness, and as the specimen will soon Ix- mounted in a glass case, the visitor will be able by the u.se of a hand glass to study even the finer details of the ))attern, although of course there is no trace either of the epidermis itself, wliicli has eiitirel.\' di.sappeared, or of the pigmentation, or coloring, if such existed. The discovery of this sj)ecimen discloses the fact that nitliongli attain- ing a height of fifteen to sixteen feet and ;i length of thirty feet, the trachodons were not coNcred with scales or a bony protecting arma-

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