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 Wild Animals I Have Known Wild Animals I Have Known is an 1898 book by naturalist and author Ernest Thompson Seton. The first entry in a new genre of realistic wild-animal fiction, Seton's first collection of short stories quickly became one of the most popular books of its day. "Lobo the King of Currumpaw", the first story in the collection, was based upon Seton's experience hunting wolves in the southwestern United States. It became a classic, setting the tone for his future works that would similarly depict animals—especially predators who were often demonized in literature—as compassionate, individualistic beings. Several years