﻿AND 
  AVES 
  OF 
  NORTH 
  AMERICA. 
  69 
  

  

  IV. 
  Cervicals 
  with 
  a 
  thick 
  obtuse 
  transverse 
  ridge 
  connecting 
  parapophyses 
  in 
  place 
  

   of 
  hypapophyses. 
  

  

  Large 
  ; 
  cup 
  quadrate. 
  bottosaurus 
  harlani. 
  

  

  IIOLOPS 
  BREVISPINIS, 
  Cope. 
  

  

  TJioracosawus 
  brevispinis 
  Cope. 
  Proceed. 
  Acad. 
  Nat. 
  Sci., 
  Phila., 
  1807, 
  p. 
  39. 
  Geological 
  Survey 
  N. 
  Jersey, 
  

   Appendix 
  C. 
  

  

  The 
  specimens 
  on 
  which 
  this 
  species 
  are 
  established 
  are, 
  a 
  cervical 
  vertebra 
  in 
  the 
  Museum 
  of 
  the 
  Academy 
  of 
  

   Natural 
  Sciences, 
  procured 
  by 
  Timothy 
  A. 
  Conrad 
  at 
  St. 
  George's, 
  Delaware, 
  and 
  one 
  cervical, 
  six 
  dorsal, 
  four 
  

   lumbar, 
  one 
  sacral 
  and 
  four 
  caudal 
  vertebrae 
  from 
  the 
  Greensand 
  of 
  Burlington 
  County, 
  N. 
  J., 
  which 
  have 
  been 
  

   liberally 
  placed 
  at 
  my 
  disposal 
  by 
  the 
  Burlington 
  County 
  Lyceum 
  of 
  Natural 
  and 
  Civil 
  History. 
  The 
  last 
  series 
  

   is 
  from 
  the 
  same 
  individual 
  apparently, 
  and 
  is 
  more 
  complete 
  than 
  that 
  of 
  any 
  other 
  cretaceous 
  Crocodile 
  hitherto 
  

   brought 
  to 
  light. 
  Also 
  on 
  a 
  seventh 
  dorsal, 
  two 
  lumbars 
  and 
  a 
  humerus 
  from 
  the 
  marl 
  excavations 
  of 
  Samuel 
  Engle, 
  

   near 
  Medford, 
  Burlington 
  County, 
  New 
  Jersey. 
  

  

  The 
  last 
  are 
  from 
  an 
  adult, 
  while 
  the 
  more 
  perfectly 
  preserved 
  is 
  not 
  fully 
  grown, 
  since 
  the 
  neural 
  arches 
  of 
  many 
  

   of 
  the 
  dorsal 
  vertebrae 
  have 
  separated 
  at 
  their 
  sutures, 
  yet 
  its 
  approach 
  to 
  maturity 
  is 
  indicated 
  by 
  the 
  persistence 
  of 
  

   this 
  arch 
  of 
  the 
  third 
  cervical, 
  of 
  some 
  dorsals, 
  lumbars 
  and 
  caudals. 
  The 
  species 
  is 
  the 
  smallest 
  of 
  the 
  genus, 
  and 
  

   will 
  furnish 
  reliable 
  date 
  for 
  the 
  estimation 
  of 
  the 
  dimensions 
  of 
  other 
  extinct 
  crocodilia. 
  The 
  vertebrae 
  are 
  relatively 
  

   more 
  slender 
  than 
  those 
  of 
  the 
  Alligators, 
  and 
  the 
  general 
  proportions 
  are 
  more 
  probably 
  those 
  of 
  the 
  T. 
  neocae- 
  

   sariensis 
  and 
  of 
  the 
  Gavials. 
  This 
  will 
  give 
  a 
  basis 
  of 
  estimation 
  for 
  the 
  head 
  and 
  tail. 
  

  

  Length 
  of 
  cervical 
  series, 
  

   " 
  dorsal 
  " 
  

   " 
  lumbar 
  " 
  

   ' 
  ' 
  sacral 
  ' 
  ' 
  

  

  Total 
  body, 
  

  

  Caudal 
  series 
  (part 
  estimated), 
  

  

  Head 
  (estimated), 
  

  

  Total, 
  

  

  Cervical 
  vertebra. 
  — 
  Characteristic 
  of 
  the 
  two 
  of 
  these 
  before 
  us, 
  is 
  the 
  deep 
  concavity 
  of 
  the 
  inferior 
  aspect 
  of 
  the 
  

   centrum 
  with 
  only 
  a 
  trace 
  of 
  a 
  keel, 
  and 
  the 
  steep 
  elevation 
  of 
  the 
  same 
  surface 
  to 
  the 
  rim 
  of 
  the 
  articular 
  cup. 
  The 
  

   latter 
  does 
  not 
  form 
  a 
  well 
  defined 
  ridge, 
  but 
  rather 
  a 
  plane, 
  connecting 
  the 
  anterior 
  extremities 
  of 
  the 
  parapophyses, 
  

   which, 
  in 
  the 
  sixth, 
  supports 
  two 
  short 
  accuminate 
  hypapophyses. 
  In 
  both 
  cervicals 
  the 
  parapophyses 
  look 
  outwards 
  

   at 
  right 
  angles 
  to 
  the 
  centrum, 
  but 
  as 
  in 
  existing 
  species, 
  possess 
  shorter 
  articular 
  surfaces 
  on 
  the 
  third, 
  whose 
  f 
  

   body 
  is 
  also 
  rather 
  more 
  elongate 
  behind 
  them. 
  In 
  the 
  sixth, 
  which 
  will 
  be 
  typical 
  of 
  the 
  posterior 
  four 
  of 
  the 
  series, 
  

   from 
  the 
  crest 
  of 
  the 
  posterior 
  shoulder 
  to 
  the 
  posterior 
  outline 
  of 
  the 
  parapophysis, 
  is 
  one-half 
  the 
  distance 
  from 
  the 
  

   latter 
  point 
  to 
  the 
  margin 
  of 
  the 
  anterior 
  cup, 
  and 
  somewhat 
  less 
  than 
  the 
  articular 
  face 
  of 
  the 
  parapophysis. 
  The 
  

   posterior 
  shoulder 
  is 
  elevated 
  in 
  both, 
  and 
  the 
  articular 
  globe 
  is 
  contracted 
  and 
  projecting. 
  

  

  The 
  vertical 
  diameter 
  of 
  the 
  neural 
  canal 
  of 
  the 
  third 
  is 
  four-fifths 
  the 
  same 
  as 
  the 
  anterior 
  cup. 
  The 
  latter 
  is 
  

   small, 
  its 
  vertical 
  diameter 
  being 
  only 
  double 
  the 
  depth 
  of 
  the 
  osseous 
  elevation 
  between 
  the 
  parapophyses. 
  The 
  

   neural 
  spine 
  is 
  little 
  elevated, 
  compressed, 
  its 
  anterior 
  margin 
  subacute, 
  and 
  obliquely 
  turned 
  backwards 
  to 
  a 
  

   posterior 
  apex. 
  

  

  AMEKI. 
  PHILOSO. 
  SOC. 
  — 
  VOL. 
  XIV. 
  18 
  

  

  Indies. 
  

  

  

  7.75 
  

  

  

  15. 
  

  

  

  6.25 
  

  

  

  2.33 
  

  

  

  31.33 
  

  

  

  35. 
  

  

  

  13. 
  

  

  

  6 
  ft. 
  7-J 
  

  

  inches, 
  

  

  