Keel (bird anatomy) keel; and ratites (from "ratis", "raft" — referring to the flatness of the sternum), having a subtle keel structure or lacking one entirely. However, this classification has fallen into disuse as evolutionary studies have shown that many flightless birds have evolved from flighted birds. The current definition of Carinatae now includes all extant birds. Keel (bird anatomy) A keel or carina (plural carinae) in bird anatomy is an extension of the sternum (breastbone) which runs axially along the midline of the sternum and extends outward, perpendicular to the plane of the ribs. The keel provides an anchor to which a
The Anatomy of Melancholy sees in it many anticipations of 20th-century psychiatry). According to "The Guardian" literary critic Nick Lezard, the "Anatomy" "survives among the cognoscenti". Washington Irving uses a quote from the book on the title page of "The Sketch Book". Burton's solemn tone and his endeavour to prove indisputable facts by weighty quotations were ridiculed by Laurence Sterne in "Tristram Shandy". Sterne also mocked Burton's divisions in the titles of his chapters, and parodied his grave and sober account of Cicero's grief for the death of his daughter Tullia. The Anatomy of Melancholy The Anatomy of Melancholy (full title: The Anatomy of