Actiniae / Sea anemones from Ernst Haeckel's 'Kunstformen der Natur' (Art forms of Nature), 1904
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Ernst Haeckel - Chaetopoda - 1904
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Ernst Haeckel from 'Kunstformen der Natur', published 1904
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Ernst Haeckel from 'Kunstformen der Natur', Birds, 1904
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Ernst Haeckel, Stephoidea from 'Kunstformen der Natur', 1899

