Chordate of the three subdivisions of chordates, all have distinct skulls. They include the hagfish, which have no vertebrae. Michael J. Benton commented that "craniates are characterized by their heads, just as chordates, or possibly all deuterostomes, are by their tails". Most craniates are vertebrates, in which the notochord is replaced by the vertebral column. These consist of a series of bony or cartilaginous cylindrical vertebrae, generally with neural arches that protect the spinal cord, and with projections that link the vertebrae. However hagfish have incomplete braincases and no vertebrae, and are therefore not regarded as vertebrates, but as members of
Wild Animals I Have Known after its publication, Seton and his works came under fire during the nature fakers controversy, which began in 1903 when naturalist John Burroughs published an essay called "Real and Sham Natural History" in "The Atlantic Monthly". In particular Burroughs blamed Seton's collection of stories for founding the sentimental animal story genre, which he felt featured fabricated events and wild animal behaviors; he even amended the title of the collection to "Wild Animals I" Alone "Have Known". Wild Animals I Have Known Wild Animals I Have Known is an 1898 book by naturalist and author Ernest Thompson Seton. The first entry