an image of some kind of art work on the back of a sheet of paper
Kunstformen der Natur - Wikipedia
Haeckel Narcomedusae - Kunstformen der Natur - Wikipedia, the free encyclopedia
an old black and white photo of corals
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an old black and white photo with many different types of sea urchins on it
Ernst Haeckel Illustration "Cyrtoidea" Ernst Haeckel's Kunstformen der Natur. Art Forms of Nature.
an illustration of different types of plants and mushrooms in black and white ink on paper
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Ernst Haeckel. Hexacoralla, Ascomycetes, Lichenes, Phaeodaria, Ophiodea, Spumellaria, Basimycetes, Diatomea, Amphoridea. Kunstformen der Natur (Art Forms in Nature). 1899-1904.
an illustration of jellyfish and other sea creatures
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Méduses I Antique Chromolitograph Print C. Merculiano 1890
an old book with pictures of shells and other things on it's cover,
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an image of gold decorations on a purple background
PHOTOS: Microscopic Life Drawings Still Dazzle 100 Years Later
Ernst Haeckel's 'Kunstformen Der Natur' Highlights (PHOTOS)
an image of different types of flowers and plants on a black background with water droplets
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an image of some plants and flowers on a black background with white lines in the middle
Ernst Haeckel — Wikipédia
Haeckel Phaeodaria 61 - Ernst Haeckel — Wikipédia
an illustration of different types of corals
Ernst Haeckel
Unus Mundus: Ernst Haeckel