﻿PLATE'I. 
  

  

  PAOK. 
  

  

  Fig. 
  1. 
  Pbephodus 
  obliql-uh, 
  St. 
  J. 
  and 
  W 
  ... 
  

  

  1 
  a. 
  Large 
  median 
  tooth, 
  right 
  ramus 
  of 
  lower 
  jaw, 
  viewed 
  from 
  abov 
  

  

  from 
  inner 
  martin: 
  le 
  do., 
  outer 
  margin; 
  1 
  d 
  do., 
  antero- 
  lateral 
  border, 
  

   showing 
  crenulated 
  coronal 
  fold; 
  1 
  e 
  do., 
  postero-lateral 
  border, 
  show- 
  

   ing 
  broad 
  undulations. 
  Kinderhook; 
  Burlington. 
  Iowa. 
  Coll. 
  Prof. 
  

   Worthen. 
  

  

  Fig. 
  1 
  a. 
  U, 
  <■, 
  'I. 
  i 
  . 
  similar 
  rlewi 
  of 
  a 
  large 
  median 
  tooth, 
  referred 
  to 
  the 
  right 
  ramus 
  of 
  

   upper 
  jaw. 
  Same 
  formation, 
  locality 
  and 
  collection. 
  

  

  Pig, 
  :t 
  a. 
  b. 
  o, 
  d, 
  e. 
  Same 
  views 
  of 
  tooth, 
  left 
  ramus 
  of 
  upper 
  jaw. 
  Same 
  formation. 
  

   ility 
  and 
  collection. 
  

  

  Tig. 
  4 
  a, 
  h. 
  c, 
  d. 
  Similar 
  views 
  of 
  an 
  elongate, 
  more 
  convex 
  tooth, 
  identified 
  with 
  the 
  

   preceding 
  form. 
  Kinderhook 
  upper 
  fish 
  beds; 
  Burlington. 
  Iowa. 
  Coll. 
  

   Mr. 
  Wachsmuth. 
  

  

  I 
  Iff. 
  •'» 
  a. 
  h, 
  c. 
  d, 
  f. 
  Similar 
  views 
  of 
  a 
  very 
  small, 
  longitudinally 
  abbrevl.r 
  re- 
  

  

  ferred 
  to 
  the 
  same 
  position 
  upon 
  the 
  jaw 
  m 
  the 
  last, 
  with 
  which 
  it 
  is 
  pro- 
  

   visionally 
  identified. 
  Sumo 
  formation, 
  locality 
  and 
  collection. 
  

  

  : 
  '•. 
  PsEPHODUS 
  ? 
  SYJTMBTBICUS, 
  St. 
  J. 
  :.' 
  ~\ 
  

  

  '• 
  0. 
  Mandibular 
  tooth, 
  right 
  ramus, 
  seen 
  from 
  above; 
  6 
  l> 
  do., 
  outline 
  from 
  Inner 
  

   margin; 
  6 
  c 
  do., 
  outer 
  margin: 
  6 
  d 
  do., 
  profile 
  outline 
  from 
  antero- 
  lateral 
  

   border, 
  foreshortened. 
  Kinderhook 
  lower 
  fish 
  bed; 
  Burlington, 
  Iowa. 
  

   Coll. 
  Mr. 
  Wa.-hsmuth. 
  

   Flff, 
  7 
  a. 
  A 
  vory 
  small, 
  nearly 
  ent: 
  ramus 
  of 
  lower 
  jaw. 
  pi 
  

  

  anally 
  identified 
  with 
  the 
  lost, 
  view 
  from 
  above. 
  SOU] 
  

   Inner 
  margin; 
  T 
  e 
  do., 
  showing 
  outer 
  InroUed 
  margin: 
  : 
  illo 
  from 
  

  

  anti'ro-lat.ral 
  border. 
  Kinderhook, 
  upper 
  flsh-bed; 
  Burlington. 
  Iowa. 
  

   Coll. 
  Mr. 
  Wa.'hsmuth. 
  

  

  