RATHKE, Heinrich. Abhandlungen zur Bildungs- und Entwickelungs-Geschichte des Menschen und der Thiere, Leipzig, F.C.W. Vogel, 1832-33, 2 vols. in one, 4°, 14 folding engraved plates (some hand-coloured), contemporary grey boards (extremities rubbed). [Garrison & Morton 480: "Rathke's most notable discovery was of structures homologous with gill slits in bird and mammalian embryos. He discredited the vertebral theory of the skull."]