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This is from Darwin's Notebook B: Transmutation of species from 1837–1838. From what I understand, the tree is a hypothetical depiction of descent used to discuss differences and relatedness between forms/species. This is the text that accompanies and follows the sketch (notebook pages 36-44): I think (sketch) Case must be that one generation ...


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Your link says: [...] whereof the Latines derive or rather borrow their Cordulus, and Cordyla [...]. Wikipedia says about this: The genus Cordylus (Sauria: Cordylidae) includes a wide variety of small- to medium-sized spiny lizards from Africa, collectively called girdle-tailed or girdled lizards. Tropical girdled lizard (Cordylus ...



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