﻿EXPLANATION 
  OF 
  THE 
  PLATES. 
  HI 
  

  

  EXPLANATION 
  OF 
  THE 
  PLATES. 
  

  

  PLATE 
  I. 
  

  

  Figs. 
  1-12. 
  Vertebra 
  and 
  limb 
  bones 
  of 
  Polycotylus 
  laiipinms, 
  Cope, 
  from 
  Kansas 
  ; 
  (see 
  p. 
  34) 
  one 
  balf 
  the 
  

   natural 
  size. 
  

  

  1. 
  Profile 
  of 
  separated 
  neural 
  arch 
  of 
  a 
  dorsal 
  vertebra 
  from 
  the 
  left 
  side. 
  

  

  la. 
  Posterior 
  view 
  of 
  same, 
  showing 
  deep 
  compressed 
  basis 
  of 
  the 
  elevated 
  diapophysis. 
  

  

  2. 
  Dorsal 
  vertebra 
  : 
  2a, 
  the 
  same 
  from 
  below. 
  

  

  3. 
  Another 
  dorsal 
  vertebra 
  posterior 
  view 
  ; 
  3a, 
  the 
  same 
  from 
  the 
  left 
  side. 
  

  

  4. 
  Another 
  dorsal, 
  from 
  a 
  position 
  less 
  median 
  than 
  the 
  last, 
  anterior 
  view 
  ; 
  4a, 
  the 
  same 
  from 
  the 
  left 
  side 
  ; 
  4b, 
  

   the 
  same, 
  inferior 
  view. 
  

  

  5. 
  An 
  anterior 
  caudal 
  vertebra 
  from 
  behind, 
  exhibiting 
  the 
  surfaces 
  for 
  chevron 
  bones 
  ; 
  5a, 
  the 
  same 
  from 
  below. 
  

  

  6. 
  A 
  more 
  posterior 
  caudal, 
  obliquely 
  crushed, 
  showing 
  proximal 
  end 
  of 
  one 
  limb 
  of 
  a 
  chevron 
  bone 
  in 
  place. 
  

  

  7. 
  Two 
  coossified 
  cervical 
  vertebrae 
  from 
  below 
  ; 
  7a, 
  the 
  same 
  from 
  the 
  side, 
  the 
  neural 
  arches 
  being 
  lost. 
  

  

  8. 
  Proximal 
  end 
  of 
  supposed 
  ilium, 
  external 
  view 
  (p. 
  37). 
  9, 
  the 
  undetermined 
  bone. 
  

   10. 
  Tibia 
  ; 
  11, 
  tarsal 
  bone. 
  

  

  12. 
  Metatarsal 
  and 
  phalanges. 
  

  

  13. 
  Portion 
  of 
  cranium 
  of 
  Holops 
  brevispinis, 
  Cope, 
  from 
  above 
  ; 
  75 
  of 
  the 
  natural 
  size. 
  From 
  Tinton 
  Falls, 
  

   Monmouth 
  Co., 
  N. 
  J. 
  In 
  the 
  cabinet 
  of 
  Rutger's 
  College, 
  N. 
  J. 
  

  

  14-15. 
  Uypsibema 
  laticauda, 
  Cope, 
  from 
  Sampson 
  Co., 
  N. 
  Ca., 
  one 
  half 
  the 
  natural 
  size. 
  In 
  the 
  state 
  cabinet 
  

   at 
  Raleigh, 
  N. 
  Ca. 
  

  

  14. 
  Right 
  external 
  metatarsal. 
  

  

  15. 
  A 
  caudal 
  vertebra 
  ; 
  15a, 
  inferior; 
  15b, 
  posterior 
  views. 
  

  

  16. 
  Taphrosphys 
  nodosus, 
  Cope, 
  one-half 
  natural 
  size, 
  from 
  Hornerstown, 
  Monmouth 
  Co., 
  N. 
  Jersey. 
  Portions 
  

   of 
  two 
  costal 
  bones. 
  

  

  PLATE 
  II. 
  

  

  Figs. 
  1-9. 
  Elasmosaurus 
  platyurus, 
  Cope, 
  from 
  near 
  Fort 
  Wallace, 
  Kansas. 
  Fig. 
  1, 
  one 
  ? 
  forty-fifth 
  natural 
  

   size 
  ; 
  figs. 
  2-10, 
  one-third 
  the 
  natural 
  size. 
  

  

  Fig. 
  1. 
  Restoration 
  of 
  the 
  skeleton 
  of 
  Elasmosaurus 
  platyurus, 
  Cope. 
  The 
  limbs, 
  and 
  the 
  cranium 
  ' 
  behind 
  the 
  

   end 
  of 
  the 
  muzzle, 
  are 
  entirely 
  hypothetical. 
  

  

  Fig. 
  2. 
  Three 
  caudal 
  vertebrae, 
  probably 
  eleventh 
  to 
  fourteenth, 
  seen 
  from 
  the 
  left 
  side 
  ; 
  2a, 
  the 
  same 
  seen 
  from 
  

   below. 
  

  

  Fig. 
  3. 
  An 
  anterior 
  median 
  dorsal 
  vertebra, 
  seen 
  from 
  the 
  articular 
  extremity 
  ; 
  3a, 
  the 
  same 
  from 
  beneath. 
  

  

  Fig. 
  3b. 
  A 
  median 
  dorsal 
  with 
  subquadrate 
  section, 
  from 
  beneath. 
  

  

  Fig. 
  4. 
  Anterior 
  dorsal 
  of 
  the 
  same, 
  from 
  the 
  extremity 
  ; 
  4«, 
  from 
  below. 
  

  

  Fig. 
  5. 
  Two 
  median 
  cervical*, 
  from 
  the 
  side 
  ; 
  a, 
  from 
  below. 
  

  

  