﻿J. 
  W. 
  HTTLKE 
  ON 
  SOME 
  IGUANODOtf-KEMAINS. 
  139 
  

  

  to 
  the 
  right 
  foot, 
  which 
  was 
  found 
  lying 
  apart 
  from 
  the 
  others, 
  all 
  

   the 
  phalanges 
  were 
  found 
  in 
  three 
  groups, 
  each 
  representing 
  a 
  toe 
  of 
  

   the 
  left 
  foot. 
  Eeconstructed 
  on 
  the 
  type 
  of 
  the 
  hind 
  foot 
  in 
  Hypsi- 
  

   lojphodon 
  Foxii, 
  the 
  outer 
  toe 
  has 
  five, 
  the 
  middle 
  four, 
  and 
  the 
  inner 
  

   toe 
  three 
  phalanges, 
  the 
  number 
  assigned 
  by 
  Prof. 
  Owen 
  to 
  these 
  

   toes 
  in 
  his 
  restoration 
  of 
  Mr. 
  Beckles's 
  specimen 
  ; 
  these 
  toes 
  are 
  

   therefore 
  homologous 
  with 
  the 
  three 
  outer 
  functional 
  toes 
  in 
  Hypsi- 
  

   lophodon, 
  and 
  with 
  the 
  2nd, 
  3rd, 
  and 
  4th 
  toes 
  of 
  extant 
  lizards. 
  

  

  Taking, 
  for 
  convenience 
  of 
  description, 
  the 
  toes 
  in 
  order 
  from 
  the 
  

   inner 
  to 
  the 
  outer 
  side 
  of 
  the 
  foot, 
  the 
  proximal 
  phalanx 
  of 
  the 
  inner 
  

   toe 
  is 
  stout, 
  and 
  nearly 
  as 
  long 
  as 
  the 
  corresponding 
  phalanx 
  of 
  the 
  

   middle 
  toe, 
  than 
  which, 
  however, 
  it 
  is 
  more 
  slender 
  and 
  constricted 
  

   at 
  the 
  middle. 
  The 
  proximal 
  end, 
  now 
  nearly 
  flat, 
  was 
  doubtless, 
  in 
  

   the 
  fresh 
  state, 
  adapted 
  by 
  a 
  cartilaginous 
  lip 
  for 
  the 
  reception 
  of 
  

   the 
  metatarsal 
  condyles. 
  The 
  contour 
  of 
  this 
  end 
  is 
  rudely 
  trigonal, 
  

   the 
  apex 
  directed 
  outwards, 
  the 
  base 
  towards 
  the 
  middle 
  toe. 
  The 
  

   distal 
  end 
  of 
  this 
  as 
  of 
  all 
  the 
  other 
  phalanges 
  is 
  condylarly 
  divided. 
  

   On 
  the 
  outer 
  border 
  of 
  the 
  phalanx, 
  nearer 
  to 
  the 
  proximal 
  than 
  to 
  

   the 
  distal 
  end, 
  is 
  a 
  swelling 
  suggestive 
  of 
  the 
  attachment 
  of 
  a 
  strong 
  

   tendon. 
  The 
  length 
  of 
  this 
  phalanx 
  between 
  its 
  extreme 
  points 
  is 
  

   15 
  centim. 
  (5^- 
  in.) 
  ; 
  the 
  girth 
  of 
  the 
  proximal 
  end 
  is 
  38 
  centim. 
  

   (15 
  in.), 
  that 
  of 
  the 
  distal 
  end 
  36 
  centim. 
  (144- 
  in.), 
  and 
  that 
  of 
  the 
  

   middle 
  of 
  the 
  phalanx 
  is 
  37 
  centim. 
  (14j 
  in.). 
  The 
  horizontal 
  

   diameter 
  of 
  the 
  proximal 
  end 
  is 
  12*6 
  centim. 
  (5 
  in.), 
  and 
  the 
  

   vertical 
  diameter 
  10*8 
  centim. 
  (4J 
  in.). 
  The 
  breadth 
  across 
  the 
  

   condyles 
  is 
  11-5 
  centim. 
  (4^ 
  in.). 
  The 
  second 
  phalanx 
  of 
  this 
  toe, 
  

   measured 
  along 
  its 
  dorsal 
  surface, 
  is 
  6 
  centim. 
  (2-J 
  in.) 
  long, 
  less 
  

   than 
  half 
  the 
  length 
  of 
  the 
  first 
  phalanx 
  ; 
  this 
  surface 
  is 
  produced 
  

   backwards 
  in 
  the 
  form 
  of 
  a 
  lip 
  adapted 
  to 
  the 
  intercondylar 
  groove 
  of 
  

   the 
  distal 
  end 
  of 
  the 
  first 
  phalanx. 
  The 
  outline 
  of 
  the 
  proximal 
  end 
  

   is 
  triangular 
  ; 
  the 
  articular 
  surface 
  is 
  concave 
  in 
  the 
  vertical 
  direc- 
  

   tion, 
  and 
  sinuous 
  in 
  the 
  horizontal. 
  The 
  distal 
  end 
  is 
  pulley-shaped 
  ; 
  

   its 
  articular 
  surface 
  is 
  prolonged 
  backwards 
  along 
  the 
  plantar 
  aspect 
  

   of 
  the 
  bone, 
  so 
  as 
  nearly 
  to 
  meet 
  the 
  proximal 
  articular 
  surface. 
  

   The 
  horizontal 
  diameter 
  of 
  this 
  phalanx 
  is 
  9*5 
  centim. 
  (3f 
  in.), 
  and 
  

   the 
  vertical 
  diameter 
  7*2 
  centim. 
  (24- 
  in.). 
  The 
  third 
  or 
  ungual 
  

   phalanx 
  is 
  only 
  inferior 
  in 
  size 
  to 
  that 
  of 
  the 
  middle 
  toe. 
  It 
  is 
  

   broad, 
  blunt, 
  and 
  curved 
  slightly 
  downwards 
  — 
  a 
  form 
  adapted 
  to 
  

   grubbing. 
  Its 
  extreme 
  length 
  is 
  17 
  centim. 
  (6^ 
  in.). 
  At 
  about 
  

   4 
  centim. 
  (1-| 
  in.) 
  from 
  the 
  proximal 
  end 
  its 
  lateral 
  borders 
  pro- 
  

   ject 
  in 
  a 
  lip 
  -like 
  form, 
  within 
  which 
  is 
  a 
  conspicuous 
  submarginal 
  

   nail-groove. 
  The 
  dorsal 
  surface 
  of 
  the 
  phalanx 
  is 
  convex 
  longitu- 
  

   dinally 
  and 
  transversely; 
  the 
  plantar 
  surface 
  is 
  concave 
  longitu- 
  

   dinally, 
  and 
  slightly 
  convex 
  transversely. 
  The 
  vertical 
  and 
  

   horizontal 
  diameters 
  of 
  the 
  proximal 
  end 
  are 
  each 
  7 
  centim. 
  

   (2 
  J 
  in.). 
  The 
  transverse, 
  horizontal 
  diameter 
  at 
  the 
  base 
  of 
  the 
  

   nail-groove 
  is 
  10-1 
  centim. 
  (4 
  in.), 
  from 
  which 
  part 
  the 
  breadth 
  

   contracts 
  to 
  6 
  -3 
  centim. 
  (2 
  J 
  in.) 
  at 
  the 
  distance 
  of 
  2 
  centim. 
  (-4 
  in.) 
  

   from 
  the 
  distal 
  end. 
  

  

  The 
  middle, 
  or 
  second 
  toe, 
  had 
  four 
  phalanges, 
  of 
  which 
  the 
  second 
  

   or 
  antepenultimate 
  was 
  unfortunately 
  not 
  recovered. 
  Unrecognized 
  

   at 
  the 
  moment 
  by 
  the 
  labourers 
  who 
  worked 
  under 
  my 
  guidance, 
  it 
  was 
  

  

  