File:The American Museum journal (c1900-(1918)) (18156303372).jpg

Title: The American Museum journal
Identifier: americanmuseumjo06amer (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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WING OF A FOSSIL Z\Q,^^k — (Lithocicadapeiita C/clL) Direct reproduction from fossil. deposited at different times, so that we must assume the presence of intermittent volcanoes somewhere in the neighborhood of the lake. The different strata, which have evidently been pro- duced by the as- sorting action of the sluggish lake currents, are often as thin as paper and are not equally fossiliferous. In fact, it is often nec- essary to remove great masses of shale and sandstone before coming on a rich fossiliferous layer, and this, though often traceable for many square feet, may be only a few inches in thickness. The extremely comminuted na- ture of the sediment is responsible for the beautiful preservation of many of the plants and insects, which, in the completeness of their detail, remind one of lithographs or delicate etchings. The collections secured by Professor Cockerell and the author show that, although more than 600 species of insects and about 150 species of plants have been described from Florissant, the number still to be unearthed must be enormously greater. One may say, in fact, that only the sur- fac9 of the vast de- posits has been scratched. With few exceptions, the Flor- issant insects hith- erto described, though all belonging to extinct species, are never- theless very similar to those found in subtropical America at the
Text Appearing After Image:
UNDESCRIBED SPECIES OF FCSSIL BEETLE (MLloid) Direct reproduction from fossil.

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