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Keywords: Origin of Vertebrates Fig 064.jpg Fig 64 ”Dorsal half of Head-region of AmmocĹ“tes Tr trabeculæ; Pit pituitary space; Inf infundibulum; Ser median serrated flange of velar folds 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 |