Plate XVI from the first volume of Pettigrew’s Design in Nature (1908), illustrating “spiral structures as seen in shells, horns, tusks, teeth, feathers, proboscides, tentacles, &c”.
Featured on PDR in the essay The Spiralist
Why do helical seashells resemble spiralling galaxies and the human heart? Kevin Dann leads us into the gyre of James Bell Pettigrew’s Design in Nature (1908), a provocative and forgotten exploration of the world’s archetypal whorl.