Keywords: Origin of Vertebrates Fig 122.png Fig 122 ”A Tubular Muscle-fibre of AmmocĹ“tes A portion of fibre seen longitudinally; B transverse section of fibre osmic preparation ; the black dots are fat-globules 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 |