Keywords: Origin of Vertebrates Fig 116.jpg Fig 116 ”Horizontal Section through the Anterior Part of AmmocÅ“tes immediately Ventrally to the Auditory Capsule sk<sub>1</sub>-sk<sub>5</sub> skeletal bars; m<sub>1</sub>-m<sub>5</sub> striated visceral muscles; mt<sub>1</sub>-mt<sub>4</sub> tubular muscles; br<sub>1</sub>-br<sub>3</sub> branchiæ; tr trabeculæ; inf infundibulum; ped pedicle; V trigeminal nerve Muco-cartilage red; soft cartilage blue; hard cartilage purple All references in this work to AmmocÅ“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 |