Evolution of the cochlea about 7 mm long. Like in lepidosaurs and archosaurs, it contains a lagena, a vestibular sensory epithelium, at its tip. Only in therian mammals (marsupials and placentals) is the cochlea truly coiled 1.5 to 3.5 times. Whereas in monotremes there are many rows of both inner and outer hair cells in the organ of Corti, in therian (marsupial and placental) mammals the number of inner hair-cell rows is one, and there are generally only three rows of outer hair cells. Amphibians have unique inner ear structures. There are two sensory papillae involved in hearing, the basilar (higher frequency) and amphibian
Fantastic Beasts and Where to Find Them described hereafter are fictional and cannot hurt you." He repeats the Hogwarts motto: "Draco dormiens nunquam titillandus", Latin for "Never tickle a sleeping dragon". "Fantastic Beasts and Where to Find Them" contains the history of magizoology and describes 85 magical species found around the world. Scamander says that he collected most of the information found in the book through observations made over years of travel across five continents. He notes that the first edition was commissioned in 1918 by Augustus Worme of Obscurus Books. However, it was not published until 1927. It is now in its fifty-second edition. In the