Keywords: Origin of Vertebrates Fig 117.jpg Fig 117 ”Sagittal Lateral Section through the Anterior Part of AmmocĹ“tes Lettering and colouring same as in Fig 116 aud auditory capsule; j v jugular vein All references in this work to AmmocĹ“tes or Petromyzon appear to refer to the species now called Lampetra planeri 1908 The Origin of Vertebrates https //archive org/details/ost-biology-the_origin_of_vertebrates Walter Holbrook Gaskell PD-old-auto-1923 1914 Origin of Vertebrates book Lampetra planeri |