How the Snake Lost Its Legs fly embryo. His books on evolutionary developmental biology (evo-devo) include "Imaginal Discs: The Genetic and Cellular Logic of Pattern Formation" (2002), "Quirks of Human Anatomy: An Evo-Devo Look at the Human Body" (2009), and "Deep Homology? Uncanny Similarities of Humans and Flies Uncovered by Evo-Devo" (2017). In Held's view, "Quirks", "Snake", and "Deep Homology" form a trilogy on evo-devo. "How the Snake Lost Its Legs" is ostensibly organised into six chapters, but in effect into three parts. The first chapter serves as an introduction and overview. The next four chapters provide what Held calls "the meatier aspects of evo-devo" with
Madama Butterfly and Butterfly watch from the hill as the ship enters the harbor and drops anchor. Then Butterfly sees that the ship is the "Abraham Lincoln", and she tells Suzuki, "They were all lying! All of them! I alone knew. Only I, who love him." She continues, "My love, my faith, triumphs completely! He has returned, and he loves me!" She tells Suzuki to prepare a fragrant bath and asks how long she will have to wait for him. "An hour? Two hours, perhaps? The house must be filled with flowers. Everywhere. As the night is full of stars!" Butterfly tells