Copepoda - Calanus horse Sophie Henriette Gertrud Taeuber-Arp was

Sophie Henriette Gertrud Taeuber-Arp was a Swiss artist

William Morris was a British textile designer

and the largest of the New Deal art projects

There are no markings on the reverse of the poster

Copepoda - Calanus horse Sophie Henriette Gertrud Taeuber-Arp wasThis is the hidden world of the plankton, magnified into art. Copepods the minuscule crustaceans that drift in their billions through the world's oceans are usually invisible to the naked eye, but Ernst Haeckel drew them here as translucent, long antennaed jewels, each one a tiny marvel of engineering set against a dark, deep water background. The plate comes from Kunstformen der Natur (Art Forms in Nature), Haeckel's defining series of 100