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Keywords: Origin of Vertebrates Fig 121.png Fig 121 ”Surface View of Anterior Surface of Velum of AmmocÅ“tes All references in this work to AmmocÅ“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 |