Keywords: Origin of Vertebrates Fig 009.png Fig 9 ”Apus from the Royal Natural History Dorsal view This probably represents Lepidurus apus but may be another Lepidurus sp 1908 The Origin of Vertebrates https //archive org/details/originofvertebra1908gask Walter Holbrook Gaskell PD-old-auto-1923 1914 Origin of Vertebrates book Lepidurus apus |