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  Plate 
  IV 
  — 
  Coiitim. 
  

  

  Page. 
  

  

  1C 
  a. 
  Mandibular 
  posterior 
  tootb. 
  left 
  ramus, 
  an 
  Imperfect 
  example, 
  seen 
  from 
  

   16 
  li, 
  do.. 
  Inner 
  margin: 
  16 
  r. 
  tlo.. 
  profile 
  from 
  anterior 
  bordi 
  

   Keokuk 
  limestone; 
  Hamilt"n. 
  111. 
  l'rof. 
  Worthen. 
  

  

  Fig. 
  1; 
  IS, 
  Vaticiscodi'sV' 
  similis. 
  St. 
  J. 
  and 
  W 
  M 
  

  

  17 
  a. 
  A 
  mature 
  perfect 
  posterior 
  tooth 
  of 
  the 
  right 
  ramus 
  of 
  upper 
  jaw. 
  view 
  from 
  

   above; 
  17 
  b. 
  do., 
  inner 
  margin: 
  IT 
  4, 
  do., 
  outer 
  inrolled 
  margin: 
  1? 
  d. 
  do., 
  

   foreshortened, 
  from 
  posterior 
  extremity. 
  Chester 
  limestone; 
  Evansville, 
  

   Illinois. 
  Dr. 
  George 
  Hambach. 
  

   V 
  \h 
  a. 
  An 
  imperfect 
  specimen 
  of 
  tl 
  ' 
  rm, 
  from 
  kit 
  ramus, 
  seen 
  from 
  above: 
  

  

  18 
  b. 
  do., 
  inner 
  margin. 
  I 
  Chester. 
  III. 
  Mr. 
  Van 
  Home. 
  

  

  19 
  a. 
  Mandibular 
  posterior 
  tooth, 
  left 
  ramus, 
  seen 
  from 
  above, 
  enlarged; 
  IV 
  I. 
  do., 
  

   inner 
  margin; 
  19 
  c. 
  do., 
  antero-lateral 
  border. 
  Chester. 
  11L 
  

  

  \V. 
  r;heli. 
  

  

  Fig. 
  Vaticinodub 
  - 
  ' 
  cai. 
  mil 
  W 
  ». 
  

  

  It 
  a. 
  Maxillary 
  posterior 
  tOOth-, 
  left 
  ramus, 
  seen 
  from 
  above, 
  outline 
  restored; 
  M 
  

  

  do., 
  from 
  inner 
  margin. 
  Lower 
  Coal 
  Measures; 
  Carllnvllle. 
  111. 
  Prof. 
  

   Wor- 
  1 
  

  

  Fig. 
  -1. 
  VatiitsodusV 
  lepis. 
  St. 
  J. 
  and 
  \V 
  88 
  

  

  ltd. 
  Maxillary 
  posterior 
  tooth, 
  right 
  ramus, 
  view 
  from 
  above, 
  outline 
  restored; 
  

   21 
  b, 
  do., 
  from 
  inner 
  margin, 
  trai- 
  

   LuSiille. 
  111. 
  Prof. 
  Wortfaea. 
  

  

  /ig. 
  22-26. 
  Va 
  simplex. 
  St. 
  J. 
  and 
  W 
  

  

  22 
  o. 
  Maxillary 
  posterior 
  tooth, 
  right 
  ramus, 
  an 
  imi 
  • 
  elinen 
  al 
  

  

  posterior 
  coronal 
  contour, 
  from 
  above, 
  enlir 
  -iner 
  margin: 
  

  

  ■lo., 
  outer 
  margin. 
  Bt 
  Louis 
  If) 
  Telia, 
  Iowa. 
  O. 
  Kt. 
  John. 
  

  

  , 
  23 
  a. 
  Bame 
  form, 
  left 
  ramus, 
  -hawing 
  a:. 
  th, 
  coronal 
  surface 
  much 
  • 
  

  

  ^> 
  ' 
  seen 
  from 
  above; 
  23 
  b. 
  do., 
  inner 
  margin. 
  BtLotttt 
  ha. 
  

  

  jt 
  a. 
  & 
  similar 
  example, 
  en 
  «nd 
  coronal 
  limits. 
  Bt. 
  

  

  Louis 
  limestone: 
  St. 
  L"i.-M 
  . 
  ProL 
  Worthen. 
  

   26 
  a. 
  Mandibular 
  posterior 
  tooth, 
  left 
  ran. 
  ''om 
  above, 
  outer 
  extremltr 
  

  

  restored 
  in 
  outline. 
  Bt. 
  Louis 
  limestone: 
  Pelln. 
  Iowa. 
  O. 
  Bl 
  

  

  maple 
  of 
  same 
  form, 
  right 
  ramus, 
  seen 
  froi; 
  H 
  b. 
  

  

  do.. 
  Inner 
  ninrgin;26 
  c. 
  do. 
  untoro-liitoral 
  border. 
  Su 
  L» 
  u:> 
  Ua 
  

   Pel 
  la. 
  

  

  