File:EB1911-Gastropoda 1.png
Size of this preview: 800 × 303 pixels. Other resolutions: 320 × 121 pixels | 993 × 376 pixels.
Original file (993 × 376 pixels, file size: 1.07 MB, MIME type: image/png)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: Three stages in the development of Trochus, during the process of torsion. (After Robert.)
A, Nearly symmetrical larva (veliger). B, A stage 1½ hours later than A. C, A stage 3½ hours later than B. f, Foot. op, Operculum. pac, Pallial cavity. ve, Velum. The shell is represented as fixed, while the head and foot rotate from left to right. In reality the head and foot are fixed and the shell rotates from right to left. From Lankester’s Treatise on Zoology. |
| Date | |
| Source |
 Encyclopædia Britannica Eleventh Edition, Vol. 11, Page 506 |
| Author | Encyclopædia Britannica |
|
This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States. |  |
Licensing
|
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
|
 |
 |
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
|
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:37, 10 March 2015 | | 993 × 376 (1.07 MB) | Animalparty | User created page with UploadWizard |
File usage
The following 2 pages use this file:
