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Crinoidea (Crinoids). Illustration shows marine animals. Kunstformen der Natur (Art Forms in Nature) is a book of lithographic and halftone prints by Ernst Haeckel. Originally published in sets of ten between 1899 and 1904 and collectively in two volumes in 1904, it consists of 100 prints of various organisms, many of which were first described by Haeckel himself, translated from sketch to print by lithographer Adolf Giltsch. Ernst Heinrich Philipp August Haeckel (February 16, 1834 - August 9. 1919 was a German biologist, naturalist, philosopher, physician, professor, marine biologist, and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many terms in biology, including anthropogeny, ecology, phylum, phylogeny, and Protista. Haeckel's identification key was not provided.
