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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; specimens; genus; shells; journal; lip; aperture; whorls; spire; plate; american journal; outer lip; inner lip; closely allied; body whorl; anterior canal; species described; soft parts; posterior canal; natural history</div>
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George Washington Tryon,  Academy of Natural Sciences of Philadelphia Conchological Section</div>
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