Keywords: Hylaeosaurus oweni.jpg Caudal vertebræ of the Hylæosaurus oweni one sixth nat size Fig 1 Ten vertebræ from the base of the tail Fig 2 Eleven vertebræ from near the end of the tail Fig 3 Under view of anterior caudal vertebræ showing the form and place of articulation of the hæmapophyses Fig 4 Back view of a hæmal arch from the same h region of the tail half nat size Fig 4' Under view of middle caudal vertebræ showing the shape of the hæmapophyses h Fig 5 Side view of a hæmal arch from a middle caudal vertebra half nat size Fig 6 Under view of caudal vertebræ beyond the middle of the tail Fig 7 Back view of a hæmal arch from one of these vertebræ half nat size The further modification of the hæmapophyses in the posterior caudal vertebræ is shown in fig 2 From the Wealden of Tilgate Sussex In the British Museum http //www lib utexas edu/books/britfossils/html/txu-oclc-13370987-2-dinosauria-plate41 php s 1840 Jos Dinkel PD-old-70-1923 Hylaeosaurus fossils |