A monograph of West American pyramidellid mollusks,
The Pyramellidae are a family of mollusks mostly of small size and world-wide distribution. No record of unmistakable Pyramidellidae has been found in the Cretaceous faunas, though such may occur, but they are numerous in the Tertiaries and perhaps most fully represented in the existing faunas.
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| Other Authors: | , |
| Format: | Book |
| Language: | English |
| Published: |
Washington,
Govt. Print. Off.,
1909.
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| Series: | Smithsonian Institution. United States national museum. Bulletin 68
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| Subjects: | |
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