CHAPTER 80. The Nut. If the Sperm Whale be physiognomically a Sphinx, to the phrenologist his brain seems that geometrical circle which it is impossible to square. In the full-grown creature the skull will measure at least twenty feet in length. Unhinge the lower jaw, and the side view of this skull is as the side of a moderately inclined plane resting throughout on a level base. But in life—as we have elsewhere seen—this inclined plane is angularly filled up, and almost squared by the enormous superincumbent mass of the junk and sperm. At the high end the skull forms