﻿)3o 
  

  

  / 
  

  

  I 
  

  

  PLATE 
  XI. 
  

  

  Page. 
  

  

  Deltodopsis 
  affinis, 
  St. 
  J. 
  and 
  W 
  160 
  

  

  -Fig. 
  1 
  a. 
  Mandibular 
  posterior 
  tooth, 
  left 
  ramus, 
  view 
  from 
  above; 
  1 
  b, 
  do., 
  showing 
  

   antero-lateral 
  border; 
  1 
  c, 
  do., 
  transverse 
  profile 
  from 
  inner 
  margin. 
  

   Warsaw 
  limestone; 
  Warsaw, 
  111., 
  Prof. 
  Worthen. 
  

  

  Deltodopsis 
  St. 
  Ludovici, 
  St. 
  J 
  and 
  W 
  161 
  

  

  Jk^-Fig. 
  2 
  a. 
  Mandibular 
  posterior 
  tooth, 
  left 
  ramus, 
  view 
  from 
  above, 
  outer 
  extremity 
  

   restored 
  in 
  outline; 
  2 
  b, 
  do., 
  longitudinal 
  profile 
  from 
  antero-lateral 
  

   border; 
  2 
  c, 
  do., 
  postero-lateral 
  border; 
  2 
  d, 
  do., 
  transverse 
  profile 
  from 
  

   inner 
  margin: 
  2 
  e, 
  do., 
  inferior 
  surface. 
  St. 
  Louis 
  formation; 
  Pella, 
  Iowa, 
  

   O. 
  St. 
  John. 
  

   iso/3 
  — 
  L, 
  Fig. 
  2/. 
  Tooth 
  of 
  the 
  same 
  form, 
  right 
  ramus. 
  Same 
  formation, 
  locality 
  and 
  col- 
  

   lection. 
  

   ' 
  Pig. 
  3 
  a. 
  A 
  smaller 
  perfect 
  example 
  of 
  the 
  same 
  form, 
  right 
  ramus, 
  from 
  above; 
  3 
  b, 
  

   do., 
  antero-lateral 
  border. 
  Alton, 
  111., 
  Prof. 
  Worthen. 
  

   /Sell 
  / 
  Fig. 
  4 
  a. 
  Maxillary 
  posterior 
  tooth, 
  right 
  ramus, 
  view 
  from 
  above, 
  inrolled 
  extremity 
  

   restored 
  in 
  outline; 
  4 
  b, 
  do., 
  antero-lateral 
  border; 
  4 
  c, 
  do., 
  the 
  same 
  in 
  

   longitudinal 
  profile; 
  4 
  d, 
  do., 
  postero-lateral 
  border; 
  4 
  e, 
  do., 
  transverse 
  

   profile 
  from 
  inner 
  margin; 
  4 
  f, 
  do., 
  inferior 
  surface. 
  St. 
  Louis 
  formation; 
  

   Pella, 
  Iowa, 
  Mr. 
  St. 
  John. 
  

   v 
  Fig. 
  5 
  a. 
  Same 
  form, 
  left 
  ramus, 
  seen 
  from 
  above; 
  5 
  b, 
  do., 
  antero-lateral 
  border. 
  

   Alton, 
  111., 
  Mr. 
  Van 
  Home. 
  

   Fig. 
  6 
  a. 
  Mandibular 
  median 
  tooth, 
  left 
  ramus, 
  view 
  from 
  above, 
  enlarged 
  and 
  par- 
  

   tially 
  restored 
  at 
  the 
  outer 
  extremity; 
  6 
  6, 
  do., 
  postero-lateral 
  border; 
  

   6 
  c, 
  do., 
  antero-lateral 
  border. 
  Pella, 
  Iowa, 
  Mr. 
  St. 
  John. 
  

  

  Deltodopsis 
  angustus,(N. 
  and 
  W. 
  sp.) 
  163 
  

  

  Fig. 
  7 
  a. 
  Maxillary 
  posterior 
  tooth, 
  left 
  ramus, 
  view 
  from 
  above; 
  7 
  b, 
  do., 
  longitudinal 
  

   profile 
  from 
  antero-lateral 
  border; 
  7 
  c, 
  do., 
  transverse 
  profile 
  from 
  inner 
  

   margin. 
  Chester 
  limestone; 
  Chester, 
  Prof. 
  Worthen. 
  

  

  Fig. 
  8 
  a. 
  Same 
  form, 
  right 
  ramus, 
  from 
  above; 
  8 
  b, 
  do., 
  antero-lateral 
  border. 
  Same 
  

   formation, 
  locality 
  and 
  collection. 
  

  

  Fig. 
  9 
  a, 
  Mandibular 
  posterior 
  tooth, 
  right 
  ramus, 
  from 
  above, 
  outer 
  margin 
  restored 
  

   in 
  outline; 
  9 
  6, 
  do., 
  antero-lateral 
  border; 
  9 
  c, 
  do., 
  transverse 
  profile 
  

   from 
  inner 
  margin. 
  Same 
  formation, 
  locality 
  and 
  collection. 
  

  

  Fig. 
  10 
  a. 
  Same 
  form, 
  left 
  ramus, 
  from 
  above, 
  restored 
  in 
  outline. 
  Same 
  formation, 
  

   locality 
  and 
  collection. 
  

  

  Deltodopsis 
  ? 
  convolutus, 
  St. 
  J. 
  and 
  W 
  165 
  

  

  i 
  * 
  » 
  \ 
  y 
  - 
  Fig. 
  11 
  a. 
  Mandibular 
  posterior 
  tooth, 
  left 
  ramus, 
  view 
  from 
  above; 
  11 
  5, 
  do., 
  longitu- 
  

   dinal 
  profile 
  from 
  the 
  antero-lateral 
  border; 
  11 
  c, 
  do., 
  postero-lateral 
  

   border; 
  11 
  d, 
  do., 
  inferior 
  surface; 
  11 
  e, 
  do., 
  transverse 
  profile 
  from 
  the 
  

   inner 
  margin. 
  Upper 
  Burlington 
  limestone, 
  fish-bed; 
  Louisa 
  county, 
  

   Iowa, 
  Mr. 
  Springer. 
  

  

  I 
  "h 
  &"f 
  -Fig. 
  12 
  a, 
  b, 
  c, 
  d, 
  e. 
  Similar 
  views 
  of 
  a 
  small 
  example 
  of 
  the 
  same 
  form, 
  right 
  ramus. 
  

   Same 
  formation, 
  locality 
  and 
  collection. 
  

  

  Deltodopsis 
  ? 
  inflexus, 
  St. 
  J. 
  and 
  W 
  167 
  

  

  Fig. 
  13 
  a. 
  Mandibular 
  posterior 
  tooth, 
  right 
  ramus, 
  from 
  above, 
  outline 
  restored; 
  

   13 
  b, 
  do., 
  transverse 
  profile 
  from 
  inner 
  margin; 
  13 
  c, 
  do., 
  outer 
  margin; 
  

   13 
  d, 
  do., 
  longitudinal 
  profile 
  from 
  the 
  antero-lateral 
  border, 
  articular 
  

   edge 
  mutilated; 
  13 
  e, 
  do., 
  postero-lateral 
  border. 
  Keokuk 
  limestone; 
  

   Warsaw, 
  111., 
  Prof. 
  Worthen. 
  

  

  