﻿IV 
  EXPLANATION 
  OF 
  THE 
  PLATES. 
  

  

  Fig. 
  C. 
  Two 
  distal 
  cervicals, 
  with 
  (?) 
  parapophysis 
  preserved 
  ; 
  a, 
  from 
  below 
  ; 
  5, 
  the 
  articular 
  extremity, 
  the 
  (?) 
  

   parapophysis 
  of 
  the 
  left 
  side 
  broken. 
  

  

  Fig. 
  7. 
  The 
  connate 
  atlas 
  and 
  axis. 
  

  

  Fig. 
  8. 
  The 
  extremity 
  of 
  the 
  muzzle, 
  from 
  above 
  ; 
  8a, 
  do. 
  from 
  the 
  side, 
  displaying 
  the 
  broken 
  teeth 
  ; 
  85, 
  the 
  

   symphysis, 
  from 
  below. 
  

  

  Fig. 
  9. 
  The 
  alveolus 
  and 
  fang 
  of 
  a 
  mandibular 
  tooth. 
  

  

  Fig. 
  10. 
  Sacro-caudal 
  vertebra 
  of 
  Elasmosaurus 
  orientalis, 
  Cope, 
  from 
  near 
  Swedesboro, 
  Gloucester 
  Co., 
  N. 
  J., 
  

   inferior 
  view 
  ; 
  10a, 
  from 
  the 
  side. 
  Both 
  one-third 
  natural 
  size. 
  

  

  PLATE 
  III. 
  

  

  Four 
  anterior 
  dorsal 
  vertebras 
  of 
  Elasmosaurus 
  platyurus, 
  Cope, 
  of 
  one-half 
  the 
  natural 
  size, 
  belonging 
  to 
  the 
  

   individual 
  figured 
  on 
  Plate 
  II. 
  Seen 
  from 
  the 
  right 
  side. 
  

  

  PLATE 
  IV. 
  

  

  Figs. 
  1-8. 
  Holops 
  obscurus, 
  from 
  Burlington 
  Co 
  , 
  N. 
  J., 
  one 
  individual. 
  

  

  Fig. 
  1. 
  Cervical, 
  dorsal 
  and 
  isolated 
  lumbar 
  vertebrae 
  a 
  little 
  more 
  than 
  three-fifths 
  natural 
  size. 
  

  

  Fig. 
  2. 
  Femur 
  of 
  same, 
  one-half 
  natural 
  size. 
  

  

  Fig. 
  3. 
  Humerus 
  of 
  same, 
  one-half 
  natural 
  size. 
  

  

  Fig. 
  4. 
  Vertebral 
  column 
  of 
  a 
  young 
  Holops 
  brevispinis, 
  Cope, 
  from 
  Burlington 
  Co., 
  N. 
  J., 
  one-half 
  natural 
  size, 
  

   seen 
  from 
  below. 
  

  

  Fig. 
  5. 
  Anterior 
  dorsal 
  vertebra 
  of 
  adult 
  Holops 
  brevispinis, 
  Cope, 
  one-half 
  natural 
  size, 
  from 
  the 
  side 
  ; 
  fig. 
  

   5a, 
  same 
  from 
  the 
  front. 
  

  

  Fig. 
  6. 
  Humerus 
  of 
  the 
  same, 
  one-half 
  natural 
  size. 
  

  

  Fig. 
  7. 
  Posterior-median 
  dorsal 
  of 
  Holops 
  caudatus, 
  Cope, 
  from 
  Barnesboro, 
  one-half 
  natural 
  size. 
  

  

  Fig. 
  8-9. 
  Vertebrae 
  of 
  Holops 
  basitruncatus, 
  Ow., 
  one-half 
  natural 
  size 
  (marked 
  erroneously 
  on 
  the 
  plate 
  

   Bottosaurus 
  harlani). 
  

  

  Fig. 
  8. 
  Cervical 
  vertebra 
  of 
  the 
  same, 
  from 
  below 
  ; 
  fig. 
  9, 
  lumbar 
  of 
  the 
  same, 
  anterior 
  ; 
  and 
  9a, 
  inferior 
  views. 
  

  

  Fig. 
  10. 
  Femur 
  of 
  Hyposaurus 
  rogersii, 
  Oav., 
  from 
  the 
  inside 
  ; 
  one-half 
  natural 
  size. 
  

  

  Fig. 
  11. 
  Humerus 
  of 
  the 
  same 
  individual 
  as 
  fig. 
  10. 
  Both 
  from 
  Barnesboro, 
  N. 
  J., 
  and 
  in 
  the 
  cabinet 
  of 
  the 
  

   State 
  Geological 
  survey 
  at 
  Butger's 
  College. 
  

  

  PLATE 
  V. 
  

  

  Fig. 
  1. 
  Anterior 
  dorsal 
  vertebra 
  of 
  PalmopMs 
  littoralis, 
  Cope, 
  from 
  the 
  right 
  side 
  ; 
  la, 
  from 
  the 
  front 
  ; 
  lb, 
  from 
  

   below. 
  From 
  specimens 
  belonging 
  to 
  the 
  Geological 
  survey 
  of 
  N. 
  Jersey. 
  

  

  Fig. 
  2. 
  ' 
  PalceopJiis 
  Jialidanus, 
  Cope, 
  anterior 
  dorsal 
  vertebra, 
  from 
  below 
  ; 
  2a, 
  same 
  from 
  the 
  front 
  ; 
  both 
  this 
  

   species 
  and 
  the 
  last, 
  of 
  natural 
  size. 
  The 
  latter 
  in 
  Prof. 
  Marsh's 
  collection, 
  Yale 
  College. 
  

  

  Fig. 
  3. 
  Dorsal 
  vertebra 
  of 
  Clidastes 
  iguanavus, 
  one-half 
  natural 
  size, 
  from 
  the 
  side 
  ; 
  the 
  neural 
  spine 
  is 
  broken 
  

   away 
  ; 
  3a, 
  anterior 
  view 
  ; 
  35, 
  view 
  from 
  above 
  ; 
  3c, 
  from 
  below. 
  This 
  vertebra 
  is 
  in 
  Prof. 
  Marsh's 
  collection 
  at 
  Yale 
  

   College, 
  Conn. 
  

  

  Fig. 
  4. 
  Posterior 
  lumbar 
  vertebra, 
  from 
  Barnesboro, 
  supposed 
  by 
  me 
  formerly 
  to 
  belong 
  to 
  Mosasaurus 
  depressus. 
  

   It 
  is 
  not 
  probably 
  that 
  species, 
  but 
  more 
  likely 
  Liodon 
  validus, 
  but 
  of 
  this 
  I 
  cannot 
  assure 
  myself. 
  4a, 
  from 
  the 
  side 
  ; 
  

   45, 
  from 
  below. 
  One-half 
  natural 
  size. 
  

  

  