Haeckel on animal and human limbs, 1874 illustrations. The nine hand and limbs bones are (from top left to bottom right): human, gorilla, orangutan, dog, seal, dolphin, bat, mole and platypus. This page is from a work on evolution by German naturalist Ernst Haeckel (1834-1919). Haeckel's argued that humans shared a common ancestry with these animals (the biogenetic law). This page is from an 1874 edition of Haekel's work 'Naturliche Schopfungsgeschichte' (The History of Creation), first published in 1868.