﻿REPTILE 
  FOSSIL 
  SKELETONS 
  — 
  GILMORE 
  

  

  203 
  

  

  Listed 
  in 
  chronological 
  order 
  these 
  are: 
  C. 
  casuarius 
  Brown,' 
  C. 
  

   excamtus 
  Gilmore,"^ 
  C. 
  infermeduis 
  Parks," 
  C. 
  bicrisfatus 
  Parks,'^ 
  

   0. 
  Jronfalis 
  Parks,'* 
  and 
  C. 
  breincristatus 
  Parks.'* 
  

  

  Five 
  of 
  the 
  six 
  species 
  were 
  established 
  on 
  skull 
  characters 
  alono 
  

   and 
  are 
  distinguished 
  chiefly 
  by 
  differences 
  found 
  in 
  the 
  shape 
  and 
  

   extent 
  of 
  the 
  crest. 
  In 
  the 
  absence 
  of 
  the 
  skull 
  in 
  the 
  specimen 
  under 
  

   consideration 
  it 
  appears 
  quite 
  impossible 
  at 
  this 
  time 
  to 
  make 
  a 
  definite 
  

   identification 
  of 
  the 
  species. 
  However, 
  on 
  the 
  basis 
  of 
  similarity 
  of 
  

   skin 
  pattern 
  and 
  close 
  agreement 
  in 
  proportions 
  to 
  the 
  type 
  specimen 
  

   of 
  Con/thosaurus 
  casuarius, 
  as 
  shown 
  in 
  table 
  4, 
  this 
  specimen 
  is 
  

   provisionally 
  identified 
  as 
  pertaining 
  to 
  that 
  species. 
  

  

  Table 
  4. 
  — 
  Comparative 
  measuremenls 
  (in 
  cm.) 
  of 
  (u'o 
  specimens 
  of 
  Corythosaurus 
  

  

  casuarius 
  

  

  Measurements 
  

  

  U.S.N.M. 
  

   No. 
  15493 
  

  

  A.M.N.n. 
  

   No. 
  5338, 
  typo 
  

  

  Length 
  ot 
  longest 
  che\Ton 
  

  

  Ischhim, 
  greatest 
  length 
  

  

  Ischium, 
  length 
  of 
  terminal 
  foot 
  

  

  Femur, 
  greatest 
  length 
  

  

  Femur, 
  position 
  of 
  fourth 
  trochanter 
  from 
  central 
  point 
  to 
  top 
  of 
  femur 
  

  

  Tibia, 
  length 
  of 
  tibia 
  and 
  astragalus 
  

  

  Fibula, 
  length 
  

  

  40 
  

   113.6 
  

  

  20 
  

   115.9 
  

  

  58.5 
  

   100.7 
  

  

  98.2 
  

  

  38.5 
  

   lfr3 
  

  

  22 
  

   lOS 
  

  

  58 
  

   100 
  

  

  95 
  

  

  » 
  Brown, 
  Bamum, 
  Bull. 
  Amer. 
  Mus. 
  Nat. 
  Hist., 
  vol. 
  33, 
  pp. 
  559-565, 
  pi. 
  41, 
  1914. 
  

   '• 
  Ollmore, 
  C. 
  W., 
  Can. 
  Field-Nat., 
  vol. 
  37, 
  pp. 
  46-52, 
  1923. 
  

  

  " 
  Parks, 
  W. 
  A., 
  Univ. 
  Toronto 
  Stud., 
  geol. 
  scr.. 
  No. 
  15, 
  pp. 
  1-57, 
  13 
  Ogs., 
  pis. 
  1-4, 
  1923. 
  

   n 
  Parks. 
  W. 
  A., 
  Univ. 
  Toronto 
  Stud., 
  gool. 
  scr.. 
  No. 
  37, 
  pp. 
  2^45, 
  pis. 
  4-8, 
  1935. 
  

  

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  t. 
  aovcmiMCNT 
  miNTiNa 
  orricii 
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