Beard therefore called this opening of the hypophysial tube the old mouth, or palostoma.
Recently, in 1893, Kupffer has also put forward the view that the hypophysial opening is the palostoma.
hypophysial hy·poph·y·si·al or hy·poph·y·se·al (hī-pŏf'ĭ-sē'əl, -zē'-, hī'pə-fĭz'ē-əl)adj. Of or relating to a pituitary gland.
hypophysis hy·poph·y·sis (hī-pŏf'ĭ-sĭs)n. pl. hy·poph·y·ses (-sēz') See pituitary gland.