﻿AND 
  AVES 
  OF 
  NORTH 
  AMERICA. 
  197 
  

  

  Germain: 
  a 
  series 
  of 
  dorsals 
  of 
  a 
  larger 
  animal 
  from 
  the 
  same 
  locality: 
  a 
  series 
  of 
  five 
  consecutive 
  lumbo-sacrals 
  from 
  

   Birmingham, 
  N. 
  J., 
  in 
  the 
  museum 
  of 
  the 
  Mount 
  Holly 
  Lyceum, 
  and 
  others 
  of 
  the 
  same 
  in 
  my 
  cabinet, 
  from 
  

   Barnesboro. 
  

  

  The 
  depressed 
  centra 
  and 
  flattened 
  transverse 
  oval 
  of 
  the 
  articular 
  faces 
  of 
  the 
  vertebras, 
  in 
  the 
  cervical, 
  dorsal, 
  

   and 
  lumbo-sacral 
  series, 
  distinguishes 
  it 
  at 
  once 
  from 
  the 
  M. 
  maximus, 
  M. 
  dekayi, 
  and 
  the 
  European 
  species. 
  No 
  

   caudal 
  vertebrae 
  are 
  preserved, 
  so 
  that 
  their 
  form 
  is 
  not 
  known, 
  but 
  it 
  is 
  probably 
  discoid 
  or 
  rounded, 
  as 
  in 
  M. 
  missu- 
  

   riensis. 
  The 
  character 
  is 
  imperfectly 
  seen 
  by 
  comparing 
  the 
  figures 
  on 
  Plate 
  VII 
  of 
  Leidy's 
  Cretaceous 
  Reptiles. 
  

   Figs. 
  9 
  to 
  14 
  represent 
  M. 
  dekayi, 
  while 
  2, 
  3 
  and 
  8 
  belong 
  to 
  the 
  M. 
  depressus. 
  The 
  vertebra? 
  more 
  nearly 
  

   resemble 
  those 
  of 
  Platecarpus 
  tympaniticus. 
  The 
  latter 
  differs 
  distinctly 
  as 
  follows.- 
  the 
  ball 
  is 
  smaller 
  in 
  proportion 
  

   to 
  the 
  length 
  of 
  the 
  vertebra, 
  and 
  is 
  less 
  transverse; 
  in 
  one 
  cervical, 
  and 
  one 
  dorsal 
  it 
  has 
  a 
  more 
  oblique 
  uplook; 
  the 
  

   base 
  of 
  the 
  cervical 
  hypapophyses 
  is 
  carried 
  to 
  the 
  edge 
  of 
  the 
  cup 
  as 
  a 
  narrow 
  keel: 
  in 
  M. 
  depressus 
  as 
  an 
  elevated 
  

   rounded 
  rib, 
  as 
  wide 
  as 
  the 
  process 
  itself. 
  

  

  The 
  remains 
  preserved 
  indicate 
  an 
  animal 
  of 
  less 
  size 
  than 
  the 
  M. 
  dekayi; 
  perhaps 
  they 
  point 
  to 
  a 
  bulk 
  more 
  like 
  

  

  that 
  of 
  the 
  Liodon 
  validus. 
  

  

  Inches. 
  

  

  Length 
  of 
  centrum 
  anterior 
  dorsal, 
  3.5 
  

  

  Width 
  cup, 
  2.3 
  

  

  Depth 
  " 
  2. 
  

  

  Extent 
  diapophyses, 
  6.9 
  

  

  Length 
  of 
  five 
  lumbo-sacrals 
  of 
  a 
  smaller 
  individual, 
  13.5 
  

  

  The 
  lumbo-sacrals 
  resemble 
  in 
  some 
  degree 
  those 
  of 
  M. 
  brumbyi, 
  but 
  differ 
  in 
  important 
  features. 
  In 
  the 
  latter 
  

   the 
  basis 
  of 
  the 
  diapophysis 
  is 
  carried 
  as 
  a 
  prominent 
  obtuse 
  ridge, 
  to 
  the 
  edge 
  of 
  the 
  ball 
  and 
  rim 
  of 
  the 
  cup, 
  giving 
  

   the 
  centrum 
  a 
  sublenticular 
  section. 
  In 
  M. 
  depressus 
  these 
  vertebrae 
  have 
  an 
  oval 
  section, 
  as 
  the 
  diapophysis 
  is 
  not 
  

   continued 
  into 
  the 
  basal 
  ridge, 
  but 
  the 
  cup 
  and 
  ball 
  are 
  well 
  separated 
  from 
  it. 
  Some 
  of 
  the 
  vertebrae 
  figured 
  by 
  

   Gibbes 
  as 
  typical 
  of 
  M. 
  brumbyi, 
  present 
  an 
  obliquity 
  of 
  the 
  articular 
  faces 
  not 
  characteristic 
  of 
  M. 
  depressus; 
  the 
  

   feature 
  is 
  slightly 
  marked 
  in 
  specimens 
  from 
  Alabama, 
  in 
  the 
  writer's 
  collection. 
  

   Measurements 
  of 
  a 
  lumbo-sacral 
  from 
  Barnesboro: 
  

  

  In. 
  Lin. 
  

  

  Length 
  centrum, 
  *1 
  9.5 
  

  

  Transverse 
  diameter 
  cup, 
  * 
  2 
  

  

  Vertical 
  diameter 
  cup, 
  1 
  7.5 
  

  

  No 
  teeth 
  can 
  be 
  certainly 
  ascribed 
  to 
  this 
  species. 
  The 
  quadrate 
  bone 
  is 
  of 
  peculiar 
  form, 
  and 
  distinguishes 
  the 
  

   species 
  from 
  all 
  others 
  as 
  readily 
  as 
  the 
  vertebrae. 
  The 
  superior 
  or 
  proximal 
  extremity 
  of 
  this 
  bone 
  is 
  characterized 
  

   by 
  its 
  relative 
  narrowness, 
  and 
  its 
  long 
  continuation 
  on 
  the 
  upper 
  margin 
  of 
  the 
  great 
  ala. 
  The 
  external 
  angle 
  is 
  

   Weaker 
  than 
  in 
  any 
  other 
  species. 
  The 
  ala 
  is 
  strongly 
  convex, 
  not 
  flattened 
  as 
  in 
  the 
  M. 
  maximus; 
  it 
  is 
  less 
  abrubtly 
  

   given 
  off 
  from 
  the 
  main 
  shaft. 
  The 
  greatest 
  peculiarity 
  of 
  the 
  bone 
  is 
  a 
  massive 
  external 
  longitudinal 
  rib, 
  just 
  in 
  

   front 
  of 
  the 
  meatus, 
  which 
  throws 
  the 
  pit 
  as 
  it 
  were 
  into 
  the 
  mouth 
  of 
  the 
  meatus, 
  the 
  position 
  of 
  the 
  latter 
  thus 
  dif- 
  

   fering 
  much 
  from 
  its 
  usual 
  superficial 
  one. 
  The 
  rib 
  sinks 
  to 
  the 
  surrounding 
  level 
  just 
  above 
  the 
  meatus, 
  and 
  is 
  not 
  

   continued 
  to 
  the 
  external 
  proximal 
  angle 
  as 
  in 
  the 
  Liodon 
  validus, 
  the 
  only 
  known 
  species 
  where 
  such 
  a 
  development 
  

   of 
  the 
  rib 
  exists. 
  

  

  Lines. 
  

   Thickness 
  at 
  meatus, 
  16.5 
  

  

  Meatus 
  to 
  anterior 
  end 
  proximal 
  articulation, 
  . 
  25.6 
  

  

  Greatest 
  width 
  proximal 
  articulation, 
  12. 
  

  

  Two 
  opisthotic 
  bones 
  are 
  described 
  under 
  the 
  head 
  of 
  Liodon 
  validus, 
  which 
  it 
  is 
  just 
  possible 
  shoud 
  be 
  ascribed 
  

   to 
  the 
  present 
  species. 
  It 
  must 
  be 
  added, 
  that 
  when 
  the 
  caudal 
  vertebrae 
  are 
  discovered 
  they 
  must 
  be 
  compared 
  with 
  

   that 
  on 
  which 
  Morton 
  founded 
  his 
  M. 
  occidentalis. 
  (See 
  under 
  M. 
  dekayi.) 
  

  

  I 
  have 
  not 
  seen 
  this 
  species 
  from 
  any 
  other 
  region 
  than 
  New 
  Jersey, 
  where 
  it 
  is 
  abundant. 
  

  

  AMERICA. 
  PHILO. 
  SOC. 
  — 
  VOL. 
  XIV. 
  50 
  

  

  