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<p>Book digitized by Google and uploaded to the Internet Archive by user tpb.
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<br>Subjects: species; inch; length; aperture; whorls; margin; whorl; columella; breadth; spire; body whorl; average weight; parietal margin; columellar margin; columellar fold; north american; outer lip; external margin; vertical prism; upper whorls</div>
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New York Academy of Sciences</div>
Internet Archive identifier