﻿190 
  THE 
  EXTINCT 
  BATRACHIA, 
  REPTILIA 
  » 
  

  

  prolonged 
  into 
  a 
  i>rocess 
  below, 
  which 
  is 
  merely 
  rudimentary 
  in 
  the 
  two 
  species 
  named. 
  The 
  centra 
  of 
  the 
  dorsal 
  

   vertebras 
  are 
  very 
  eylindric, 
  and 
  shortened 
  antero-posteriorly. 
  In 
  an 
  anterior, 
  with 
  diapophyses 
  directed 
  obliquely 
  up- 
  

   wards, 
  the 
  centrum 
  is 
  very 
  convex 
  in 
  cross-section 
  beneath 
  and 
  the 
  articular 
  faces 
  are 
  a 
  little 
  deeper 
  than 
  wide. 
  In 
  

   more 
  posterior 
  dorsals, 
  with 
  diapophyses 
  at 
  the 
  middle 
  of 
  the 
  centrum, 
  the 
  inferior 
  convexity 
  is 
  also 
  very 
  strong. 
  

   The 
  articular 
  ball 
  is 
  subpentagonal 
  in 
  outline, 
  its 
  lateral 
  margin 
  being 
  remarkably 
  prolonged 
  forwards 
  towards 
  the 
  

   basis 
  of 
  the 
  diapophysis. 
  This 
  form 
  prepares 
  us 
  for 
  subpentagonal 
  lumbars 
  such 
  as 
  characterize 
  several 
  species 
  of 
  

   the 
  genus. 
  

  

  The 
  hypapoplvysis 
  of 
  the 
  axis 
  is 
  very 
  stout, 
  occupying 
  its 
  whole 
  inferior 
  surface; 
  its 
  articular 
  face 
  is 
  half 
  as 
  large 
  

   as 
  the 
  ball 
  of 
  the 
  centrum, 
  its 
  posterior 
  margin 
  extending 
  as 
  far 
  as 
  the 
  line 
  of 
  the 
  edge 
  of 
  the 
  ball. 
  The 
  latter 
  a 
  little 
  

   broader 
  than 
  deep. 
  That 
  of 
  the 
  seventh 
  to 
  ninth 
  cervical 
  is 
  more 
  nearly 
  round. 
  Tbe 
  diapophysis 
  of 
  the 
  latter 
  has 
  a 
  

   triangular 
  section,* 
  a 
  plane 
  face 
  being 
  anterior, 
  and 
  angle, 
  posterior. 
  

  

  Length 
  of 
  (7th, 
  8th 
  or 
  9th?) 
  cervical, 
  

   Width 
  ball, 
  

  

  " 
  neural 
  canal, 
  

   Expanse 
  of 
  diapophyses, 
  

   Length 
  neurapophysis 
  of 
  atlas, 
  

  

  " 
  of 
  a 
  median 
  dorsal, 
  

   Width 
  ball 
  of 
  do., 
  

   Depth 
  do. 
  do., 
  

  

  Length 
  of 
  os 
  quadratum, 
  

  

  " 
  proximal 
  articular 
  face, 
  

   distal 
  

   Width 
  proximal 
  extremity 
  — 
  greatest, 
  

   " 
  " 
  " 
  —least, 
  

  

  •' 
  great 
  ala 
  at 
  middle 
  (within), 
  

  

  This 
  animal, 
  if 
  the 
  measurements 
  of 
  the 
  Kansas 
  specimen 
  are 
  to 
  be 
  relied 
  on, 
  must 
  have 
  reached 
  a 
  length 
  of 
  seventy 
  

   feet. 
  

  

  Portions 
  of 
  an 
  individual 
  of 
  similar 
  proportions 
  are 
  preserved 
  in 
  the 
  Cabinet 
  of 
  the 
  Burlington 
  Co. 
  Lyceum, 
  

   which 
  were 
  found 
  in 
  Gloucester 
  Co., 
  on 
  the 
  farm 
  of 
  David 
  B. 
  Coles. 
  They 
  consist 
  of 
  two 
  cervicals, 
  five 
  dorsals 
  and 
  

   three 
  caudals. 
  Those 
  of 
  the 
  first 
  two 
  series 
  resemble 
  those 
  of 
  the 
  Monmouth 
  Co. 
  individual 
  exactly, 
  while 
  the 
  cau- 
  

   dals 
  furnish 
  important 
  additional 
  characters. 
  The 
  latter 
  are 
  furnished 
  with 
  coossified 
  chevron 
  bones, 
  and 
  their 
  di- 
  

   apophyses 
  are 
  situated 
  a 
  little 
  above 
  them, 
  and 
  have 
  an 
  oval 
  section. 
  The 
  articular 
  faces 
  are 
  more 
  nearly 
  round 
  

   than 
  in 
  some 
  other 
  species, 
  e. 
  g. 
  M. 
  dekayi, 
  and 
  are 
  as 
  deep 
  as 
  wide, 
  with 
  but 
  a 
  slight 
  truncation 
  on 
  the 
  upper 
  ex- 
  

   ternal 
  outlines. 
  

  

  Lines. 
  

   Length 
  centrum, 
  3:3..) 
  

  

  Depth 
  ball, 
  36.7 
  

  

  Width 
  do., 
  39. 
  

  

  A 
  more 
  posterior 
  caudal 
  of 
  an 
  individual 
  of 
  the 
  same 
  size, 
  in 
  the 
  Museum 
  of 
  the 
  Acad. 
  Nat. 
  Sciences, 
  is 
  smaller, 
  

   and 
  exhibits 
  diapophyses 
  at 
  a 
  slightly 
  higher 
  position, 
  and 
  more 
  eylindric. 
  Its 
  proportions 
  are 
  quite 
  similar 
  to 
  those 
  

   of 
  the 
  caudal 
  measured 
  above. 
  From 
  this 
  cause 
  I 
  am 
  disposed 
  to 
  think 
  that 
  this 
  species 
  may 
  have 
  had 
  sub-round, 
  or 
  

   very 
  slightly 
  compressed 
  caudals, 
  far 
  posteriorly 
  in 
  the 
  series, 
  as 
  in 
  it. 
  missuriensis. 
  See 
  the 
  measurements 
  of 
  the 
  

   corresponding 
  vertebrae 
  of 
  M. 
  dekayi. 
  

  

  The 
  remains 
  of 
  a 
  still 
  more 
  gigantic 
  individual 
  of 
  this 
  species 
  were 
  submitted 
  to 
  me 
  by 
  Dr. 
  G. 
  J. 
  Fisher, 
  of 
  Sing- 
  

   Sing, 
  New 
  York, 
  in 
  whose 
  possession 
  they 
  now 
  are. 
  

  

  The 
  bones 
  were 
  obtained 
  through 
  the 
  efforts 
  of 
  P. 
  R. 
  Brinckerhoft'. 
  of 
  Westchester 
  County, 
  N. 
  Y.. 
  in 
  the 
  latter 
  

  

  III. 
  

  

  Lin. 
  

  

  4 
  

  

  10.5 
  

  

  3- 
  

  

  

  

  10 
  

  

  7 
  

  

  5 
  

  

  4 
  

  

  

  4 
  

  

  

  3 
  

  

  5 
  

  

  3 
  

  

  2 
  

  

  7 
  

  

  6 
  

  

  5 
  

  

  2 
  

  

  5 
  

  

  

  2 
  

  

  1 
  

  

  1 
  

  

  5 
  

  

  2 
  

  

  8 
  

  

  