File:PSM V07 D585 Aperture of shell closed by operculum.jpg

PSM_V07_D585_Aperture_of_shell_closed_by_operculum.jpg(545 × 513 pixels, file size: 35 KB, MIME type: image/jpeg)

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English: Drawing of the apertural view of the shell closed by operculum.
Date
Source Popular Science Monthly Volume 7
Author Unknown authorUnknown author
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current02:58, 4 July 2010Thumbnail for version as of 02:58, 4 July 2010545 × 513 (35 KB)Ineuw{{Information |Description = Aperture of shell closed by operculum |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_7.djvu/585 |Date = 1875 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} {{GFDL-user-w|en|

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