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
Jock Stirrup Security Review. In April 2013, Stirrup was appointed Knight Companion of the Order of the Garter by the Queen Elizabeth II. He was appointed as an honorary Marshal of the Royal Air Force in the Queen's 2014 Birthday Honours. In 2013 Stirrup, along with Field Marshal Lord Guthrie and Admiral of the Fleet Lord Boyce, called upon the British Government to derogate from the European Convention on Human Rights for the duration of deployed operations. They were concerned that the increased risk of prosecution faced by commanders would lead to a generation of risk-averse military leaders. In August 2014, Stirrup