Keywords: Origin of Vertebrates Fig 005.png Fig 5 from H Woodward ”1 Limulus polyphemus dorsal aspect 2 Limulus young in trilobite stage 3 Prestwichia rotundata 4 Prestwichia Birtwelli 5 Hemiaspis limuloides 6 Pseudoniscus aculeatus Prestwichia Woodward is now synonymised to Euproops extracted image Pseudoniscus aculeatus Origin of Vertebrates png 1908 The Origin of Vertebrates https //archive org/details/originofvertebra1908gask Walter Holbrook Gaskell PD-old-auto-1923 1914 Origin of Vertebrates book Limulus polyphemus anatomy Limuloides Euproops Pseudoniscus |