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| Description |
drawing of eggs of Physa gyrina: upper image is egg-mass showing position of eggs in envelope. Lower images is enlarged single egg showing position of an embryo. |
| Date | |
| Source | Frank Collins Baker: Shells of land and water; a familiar introduction to the study of the mollusks. (1903), Chicago, A.W. Mumford, page 36. (Exported from the file at https://archive.org/details/shellsoflandwate1903bake from the page 66 of the PDF file in 600 dpi/inch and a bit retouched by User:Snek01.) |
| Author | Frank Collins Baker (1867-1942) |
| Permission (Reusing this file) |
public domain |
|
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:35, 15 October 2008 | | 826 × 830 (194 KB) | Snek01 | {{Information |Description={{en|drawing of eggs of ''Physa gyrina'': upper image is egg-mass showing position of eggs in envelope. Lower images is enlarged single egg showing position of an embryo.}} |Source=Frank Collins Baker: ''Shells of land and w |
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