﻿J. 
  W. 
  HULKE 
  Otf 
  THE 
  OS 
  PUBIS 
  AND 
  

  

  38. 
  Note 
  on 
  the 
  Os 
  Pubis 
  and 
  Ischium 
  of 
  Ornithopsis 
  eucamerotus*. 
  

   By 
  J. 
  W. 
  Hulke, 
  Esq., 
  P.R.S., 
  P.G.S. 
  (Read 
  March 
  22, 
  1882.) 
  

  

  [Plate 
  XIV.] 
  

  

  In 
  four 
  communications 
  on 
  remains 
  of 
  this 
  remarkable 
  aberrant 
  

   form 
  of 
  Dinosaur 
  which 
  the 
  Society 
  has 
  published 
  in 
  its 
  Quarterly 
  

   Journal, 
  I 
  have 
  described 
  and 
  figured 
  its 
  cervical 
  and 
  thoracic 
  

   vertebrae, 
  and 
  noticed 
  the 
  affinity 
  which 
  these 
  suggest 
  with 
  Ceteo- 
  

   saurus 
  oxoniensis, 
  and 
  also 
  with 
  certain 
  North- 
  American 
  Dinosaurs 
  

   described 
  by 
  Profs. 
  0. 
  C. 
  Marsh 
  and 
  Copef 
  . 
  At 
  the 
  date 
  of 
  my 
  last 
  

   communication 
  (1879), 
  I 
  was 
  unable 
  to 
  lay 
  before 
  the 
  Society 
  any 
  

   information 
  respecting 
  the 
  vertebras 
  behind 
  the 
  thorax, 
  or 
  the 
  

   girdle- 
  and 
  limb-bones. 
  None 
  of 
  these 
  had 
  been 
  found 
  by 
  Mr. 
  Pox 
  

   or 
  myself 
  in 
  such 
  close 
  association 
  with 
  vertebrae 
  of 
  the 
  forms 
  I 
  

   described 
  as 
  to 
  demonstrate 
  that 
  they 
  were 
  parts 
  of 
  one 
  skeleton 
  ; 
  

   and 
  in 
  the 
  absence 
  of 
  this, 
  the 
  expectation 
  that 
  the 
  posterior 
  verte- 
  

   brae 
  and 
  the 
  other 
  bones 
  should 
  exhibit 
  a 
  textural 
  and 
  constructive 
  

   agreement 
  with 
  the 
  vertebrae 
  known 
  to 
  us 
  constituted 
  during 
  several 
  

   years 
  an 
  insuperable 
  obstacle 
  to 
  their 
  identification. 
  

  

  The 
  removal 
  of 
  this 
  prejudice 
  we 
  owe 
  to 
  the 
  recovery 
  in 
  Colorado 
  

   of 
  a 
  large 
  series 
  of 
  remains 
  of 
  allied 
  forms, 
  in 
  excellent 
  preservation, 
  

   which 
  demonstrate 
  in 
  the 
  posterior 
  vertebrae 
  the 
  absence 
  of 
  the 
  side 
  

   pits 
  and 
  chambers 
  that 
  are 
  so 
  conspicuous 
  a 
  feature 
  in 
  the 
  cervical 
  

   and 
  thoracic 
  centra, 
  and 
  the 
  solidity 
  of 
  the 
  posterior 
  centra, 
  as 
  also 
  

   of 
  the 
  girdle- 
  and 
  limb-bones 
  %. 
  

  

  The 
  figures 
  already 
  published 
  by 
  Profs. 
  0. 
  C. 
  Marsh 
  and 
  Cope 
  have 
  

   confirmed 
  an 
  identification 
  that 
  I 
  made 
  in 
  1873 
  of 
  three 
  bones 
  then 
  

   recently 
  acquired 
  by 
  the 
  late 
  Rev. 
  W. 
  Pox 
  ; 
  and 
  they 
  enable 
  me 
  now 
  

   to 
  make 
  another 
  step 
  in 
  the 
  reconstruction 
  of 
  Omiihopsis. 
  These 
  

   bones, 
  lately 
  purchased 
  as 
  part 
  of 
  the 
  Pox 
  Collection 
  by 
  the 
  British 
  

   Museum, 
  were 
  bought 
  by 
  Mr. 
  Pox 
  with 
  several 
  of 
  his 
  finest 
  typical 
  

   thoracic 
  vertebrae 
  of 
  Ornithopsis, 
  and 
  a 
  couple 
  of 
  other 
  vertebrae, 
  

   which, 
  considering 
  them 
  Ceteosaurian, 
  he 
  threw 
  aside, 
  as 
  he 
  never 
  

   placed 
  any 
  value 
  on 
  these. 
  Two 
  of 
  these 
  bones 
  appeared 
  to 
  me 
  to 
  be 
  

   unmistakably 
  ischia, 
  and 
  the 
  third 
  a 
  pubis. 
  Mr. 
  Pox 
  permitted 
  me 
  

   to 
  take 
  a 
  rough 
  sketch 
  of 
  them 
  ; 
  but 
  for 
  a 
  long 
  time 
  he 
  would 
  not 
  

   allow 
  their 
  complete 
  extrication 
  from 
  the 
  rock, 
  nor 
  the 
  readjustment 
  

  

  * 
  Synonyms 
  : 
  Ev 
  earner 
  ot 
  us, 
  Hulke 
  ; 
  Bothriospondylus 
  (in 
  part), 
  R. 
  Owen 
  ; 
  

   Ckondrosteosaurus, 
  R. 
  Owen. 
  

  

  t 
  Its 
  affinity 
  with 
  Camarosaurus, 
  Cope, 
  was 
  discussed 
  by 
  Prof. 
  R. 
  Owen 
  in 
  a 
  

   paper 
  in 
  the 
  Ann. 
  & 
  Mag. 
  Nat. 
  Hist. 
  Sept, 
  1878, 
  " 
  Restoration 
  of 
  Ckondrosteo- 
  

   saurus? 
  the 
  name 
  substituted 
  for 
  Bothriospondylus, 
  under 
  which 
  he 
  had 
  pre- 
  

   viously 
  described 
  (Pal. 
  Soc. 
  Mem. 
  1875-1876) 
  some 
  vertebral 
  remains 
  in 
  the 
  

   British 
  Museum, 
  including 
  the 
  centra 
  (nos. 
  2239, 
  28362) 
  upon 
  which, 
  in 
  1869, 
  

   Prof. 
  Seel 
  ey 
  had 
  founded 
  tbe 
  genus 
  Ornithopsis. 
  

  

  \ 
  Prof. 
  O. 
  C. 
  Marsh 
  writes 
  to 
  me, 
  under 
  date 
  Dec. 
  24, 
  1881, 
  that 
  he 
  had 
  

   nearly 
  completed 
  a 
  memoir 
  on 
  these 
  Sauropoda, 
  illustrated 
  by 
  90 
  quarto 
  

   plates. 
  

  

  