﻿In. 
  

  

  Lin. 
  

  

  2 
  

  

  4. 
  

  

  1 
  

  

  7.5 
  

  

  

  8. 
  

  

  

  5.5 
  

  

  162 
  THE 
  EXTINCT 
  BATRACHIA, 
  REPTILIA 
  

  

  Anteroposterior 
  extent 
  of 
  last 
  vertebral, 
  

   Width 
  to 
  middle 
  line, 
  

   Thickness 
  in 
  front, 
  

  

  " 
  behind, 
  

  

  Width 
  costal 
  near 
  head, 
  1 
  9. 
  

  

  Thickness 
  costal 
  near 
  head, 
  5. 
  

  

  The 
  presence 
  of 
  this 
  azygus 
  bone 
  may 
  be 
  abnormal, 
  in 
  which 
  case 
  the 
  group 
  Prochonias 
  will 
  not 
  be 
  distinguished 
  

   I 
  from 
  Taphrosphys. 
  

  

  VAR. 
  ENODIS, 
  Cope. 
  

  

  This 
  may 
  be 
  a 
  smooth 
  or 
  worn 
  individual 
  of 
  T. 
  molops. 
  The 
  remains 
  are 
  in 
  good 
  condition, 
  and 
  do 
  not 
  appear 
  

   to 
  have 
  been 
  eroded 
  or 
  corroded. 
  It 
  is 
  indicated 
  by 
  a 
  large 
  portion 
  of 
  the 
  plastron 
  of 
  a 
  single 
  individual 
  from 
  Barnes- 
  

   boro, 
  N. 
  J 
  . 
  It 
  is 
  a 
  species 
  of 
  considerable 
  size 
  and 
  solidity, 
  and 
  is 
  distinguished 
  by 
  the 
  entire 
  absence 
  of 
  any 
  sculp- 
  

   ture, 
  or 
  of 
  grooves 
  for 
  the 
  margins 
  of 
  horny 
  scuta. 
  The 
  external 
  margin 
  of 
  the 
  whole 
  length 
  of 
  the 
  hyposternal 
  bone 
  

   is 
  of 
  equal 
  thickness 
  and 
  nearly 
  equally 
  obtuse, 
  a 
  circumstance 
  uncommon 
  among 
  tortoises. 
  The 
  vertical 
  portion 
  of 
  

   this 
  bone 
  is 
  massive, 
  indicating 
  strong 
  union 
  with 
  the 
  carapace. 
  The 
  margin 
  of 
  the 
  hyosternal, 
  descending 
  from 
  the 
  

   bridge-process, 
  is 
  more 
  compressed 
  and 
  acute, 
  as 
  are 
  also 
  other 
  portions 
  of 
  the 
  margin 
  of 
  the 
  anterior 
  lobe 
  of 
  the 
  

   sternum. 
  

  

  The 
  ischiadic 
  scar 
  is 
  not 
  far 
  behind 
  the 
  hyosternal 
  suture, 
  and 
  is 
  quite 
  elevated 
  on 
  a 
  broad 
  base. 
  It 
  is 
  wider 
  

   behind 
  than 
  before. 
  

  

  Measurements. 
  In. 
  Lin. 
  

  

  Length 
  of 
  hyosternal 
  from 
  middle 
  of 
  vertical 
  process, 
  4 
  3. 
  

  

  Thickness 
  of 
  margin 
  of 
  do., 
  5. 
  

  

  Length 
  of 
  pubic 
  scar, 
  1 
  10.2 
  

  

  Distance 
  behind 
  hyosternal 
  suture, 
  1 
  2.5 
  

  

  Thickness 
  of 
  xiphisternal 
  near 
  do. 
  suture, 
  5. 
  

  

  This 
  may 
  be 
  an 
  old 
  T. 
  molops 
  worn 
  smooth. 
  

   Position: 
  — 
  The 
  upper 
  green-sand 
  bed 
  of 
  the 
  upper 
  cretaceous 
  of 
  New 
  Jersey. 
  

  

  TAPHROSPHYS 
  LONGINUCHUS, 
  Cope. 
  

  

  Spec. 
  nov. 
  

  

  Established 
  on 
  a 
  nearly 
  complete 
  but 
  much 
  fractured 
  individual, 
  from 
  the 
  excavations 
  of 
  David 
  Haines, 
  N. 
  Jersey. 
  

   This 
  is 
  one 
  of 
  the 
  smaller 
  species, 
  and 
  is 
  of 
  light 
  construction, 
  though 
  rather 
  stouter 
  than 
  the 
  T. 
  sulcatus. 
  In 
  

   many 
  points 
  it 
  resembles 
  the 
  latter 
  species, 
  but 
  differs 
  in 
  many 
  others. 
  

  

  A 
  marked 
  peculiarity 
  is 
  seen 
  in 
  the 
  greater 
  posterior 
  prolongation 
  of 
  the 
  first 
  vertebral 
  dermal 
  scutum. 
  Its 
  pos- 
  

   terior 
  suture 
  enters 
  the 
  first 
  costal 
  bone 
  considerably 
  nearer 
  the 
  costal 
  than 
  the 
  nuchal 
  suture; 
  it 
  is 
  considerably 
  nearer 
  

   the 
  nuchal 
  than 
  the 
  costal 
  in 
  T. 
  molops, 
  T. 
  sulcatus, 
  and 
  T. 
  leslianus. 
  The 
  costo-first-vertebral 
  dermal 
  sutures 
  are 
  

   thus 
  less 
  divergent 
  than 
  in 
  T. 
  leslianus, 
  at 
  least. 
  The 
  suture 
  with 
  the 
  first 
  vertebral 
  bone 
  is 
  quite 
  concave. 
  The 
  axil- 
  

   lary 
  pit 
  is 
  strongly 
  marked, 
  but 
  not 
  so 
  much 
  so 
  as 
  in 
  T. 
  molops. 
  

  

  M. 
  M. 
  

  

  Width 
  first 
  costal 
  bone 
  (proximal), 
  0.0645 
  

  

  Thickness 
  (posterior), 
  .0085 
  

  

  Width 
  from 
  costal 
  suture 
  to 
  transverse 
  dermal, 
  .026 
  

  

  " 
  axillary 
  pit, 
  .0125 
  

  

  Three 
  vertebral 
  bones 
  indicate 
  that 
  the 
  most 
  elongate 
  are 
  not 
  so 
  slender 
  as 
  those 
  of 
  the 
  genus 
  Trionyx. 
  The 
  lat- 
  

   eral 
  outlines 
  are 
  straight 
  and 
  make 
  an 
  open 
  angle 
  with 
  each 
  other, 
  the 
  short 
  anterior 
  and 
  posterior 
  are 
  gently 
  convex 
  

   backwards. 
  The 
  last 
  vertebral 
  bone 
  is 
  small 
  and 
  subround. 
  Three 
  rudimental 
  vertebrals 
  were 
  attached 
  beneath 
  the 
  

  

  