Kunstformen der Natur

by Ernst Haeckel, 1904.

5 of 1000 engravings produced based on Haeckel's sketches and watercolours:
1. Ascidian (Ascidiae)
2. Bat (Chiroptera)
3. Box Jellyfish (Cubomedusae)
4. Conifer (Coniferae)
5. Jellyfish (Discomedusae) which Haeckel named Discomedusae annasethe after his wife Anna Sethe who died the year before he observed this creature. He said the tentacles reminded him of her long hair.

"...not just a book of illustrations but also the summation of his view of the world."
- Olaf Breidbach