Keywords: Origin of Vertebrates Fig 155.png Fig 155 ”A The Digging Appendage or Ectognath of Limulus; B The Middle Protuberance 2 of the Entocoxite opened to show the Generative and Hepatic Tissue gen within it; C One of the Prosomatic Locomotor Appendages or Endognaths of Limulus for comparison with A fl flabellum; cox coxopodite; ent entocoxite; m mandible; i m inner mandible or epicoxite 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 |