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Batrachia frogs, 1904 illustration. This illustration is from 'Kunstformen der Natur' (Art Forms in Nature, 1904) by German biologist Ernst Haeckel (1834-1919). The illustrations were by Haeckel, with the lithography by Adolf Giltsch (1852-1911). As well as illustrating animals and plants, the artworks represented Haeckel's philosophy and worldview, with the specimens arranged for specific aesthetic and visual impact.
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