XX. On a Fossil Shell of a fibrous Structure, the Fragments of which occur abundantly in the Chalk Strata and in the Flints accompanying it.
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| Description | |
| Author/s |
author: James Sowerby |
| Publication date | December 1822 |
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| Wikipedia link | |
| Copyright status |
public domain in United States. |
| Missing/wrong data? | Edit Wikidata item |