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Document Type

Research

Abstract

Among a large number of species recently discovered in the lower coal measures near Des Moines are some hitherto unrecognized forms. The following are the descriptions of three of the most important shells.

Publication Date

1890

Journal Title

Proceedings of the Iowa Academy of Sciences

Volume

1

Issue

Pt. 2

First Page

22

Last Page

23

Copyright

©1890 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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