Annual report

Description:

Identifier: annualreport5741903newy (find matches)
Title: Annual report
Year: 1902 (1900s)
Authors: New York State Museum
Subjects: New York State Museum Science Science
Publisher: Albany : University of the State of New York
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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iluric, leaving but a few stragglers (four species inNorth America) in the Devonic.1 For this reason they can be considered aclass of organisms most characteristic of the Champlainic and Siluric eras. During the period of their greatest vitality they attained a remarkablerapidity of development, which has permitted the division of the graptoliteshales of several regions into a great number of life zones. This is notablythe case in certain parts of Sweden, where, for instance, Tullberg cites fromScania (1882) no less than 26 graptolite zones of the Lower and Upper Siluric.This fact, together with the discovery brought out by investigations inGreat Britain, France, America and Australia, that the larger division? hurley has also described a fossil from the Choteau limestone (Carboniferous) ofSedalia Mo. as Dictyonema blairi. This, however, is very doubtful and accordingto last accounts only the remains of a plant. Chart of the World showing the Distribution of the Lower Graptolite Fauna
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I and areas it the beginning of the Clianrplain (Lower Silurio) era in drub lint: their boundaries
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