Keywords: Origin of Vertebrates Fig 141.png Fig 141 ”Section of Skin and Underlying Tissues in the Head-Region of AmmocĹ“tes a cranial wall; b muco-cartilage; c laminated layer; d external cuticular layer All references in this work to AmmocĹ“tes or Petromyzon appear to refer to the European Brook Lamprey now called Lampetra planeri 1908 The Origin of Vertebrates https //archive org/details/originofvertebra1908gask Walter Holbrook Gaskell PD-old-auto-1923 1914 Origin of Vertebrates book Lampetra planeri |