| Publication Type: | Journal Article |
| Year of Publication: | 1844 |
| Authors: | C. Darwin |
| Journal: | The Annals and magazine of natural history; zoology, botany, and geology being a continuation of the Annals combined with Loudon and Charlesworth's Magazine of Natural History |
| Volume: | 14 |
| Pagination: | 241-251 |
| URL: | http://www.biodiversitylibrary.org/item/19582#page/267/mode/1up |
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