﻿PLATE 
  VII. 
  

  

  Pagf. 
  

   / 
  Fig. 
  ]— 
  10 
  Cochliodus 
  Van 
  Hoknh, 
  St. 
  J. 
  and 
  W 
  120 
  

  

  i 
  la. 
  Maxillary 
  posterior 
  tooth, 
  left 
  ramus, 
  view 
  from 
  above;! 
  b 
  do., 
  inner 
  margin; 
  

   1 
  c 
  do., 
  outer 
  margin; 
  1 
  d 
  do., 
  foreshortened 
  view 
  from 
  anterior 
  border; 
  

   1 
  e 
  do., 
  inferior 
  surface. 
  St. 
  Louis, 
  Alton, 
  111. 
  Mr. 
  W. 
  C. 
  Van 
  Home. 
  

   l3\plA$' 
  l 
  &' 
  2 
  a 
  - 
  Same 
  form, 
  right 
  ramus, 
  anterior 
  portion 
  broken 
  away, 
  showing 
  impres- 
  

   sion 
  of 
  inferior 
  surface 
  in 
  the 
  limestone 
  matrix. 
  Same 
  formation, 
  

   / 
  locality 
  and 
  collection. 
  

  

  V 
  Fig. 
  3 
  a. 
  Transverse 
  coronal 
  ridges 
  of 
  the 
  maxillary 
  medium 
  series 
  of 
  left 
  ramus, 
  

   . 
  30" 
  1 
  upon 
  a 
  common 
  basal 
  support, 
  seen 
  from 
  above, 
  enlarged; 
  3 
  5 
  do., 
  from 
  

  

  the 
  inner 
  margin; 
  3 
  c 
  do., 
  outer 
  margin; 
  3 
  d 
  do., 
  from 
  the 
  antero 
  -lateral 
  

   border: 
  3 
  e 
  do., 
  showing 
  the 
  undivided 
  inferior 
  surface 
  of 
  the 
  base. 
  St. 
  

   Louis, 
  Pella, 
  Iowa. 
  Mr. 
  Van 
  Home. 
  

   Fig. 
  4 
  a, 
  b, 
  c. 
  Inner, 
  outer 
  and 
  profile 
  views 
  of 
  a 
  fore 
  tooth 
  of 
  the 
  maxillary 
  median 
  

   or 
  anterior 
  series, 
  enlarged. 
  Same 
  formation, 
  locality 
  and 
  collection. 
  

   / 
  vL. 
  Fig. 
  5 
  a, 
  5, 
  c. 
  Similar 
  views 
  of 
  another 
  example 
  of 
  the 
  same 
  form, 
  enlarged. 
  Same 
  • 
  

  

  1° 
  formation, 
  locality 
  and 
  collection. 
  

  

  / 
  Fig 
  6 
  a, 
  b, 
  c, 
  d. 
  Another 
  specimen 
  of 
  the 
  same 
  form, 
  seen 
  from 
  above, 
  inner, 
  outer 
  

   . 
  5 
  q(o- 
  ■ 
  and 
  profile 
  views. 
  Same 
  formation, 
  locality, 
  and 
  collection. 
  

  

  Fig. 
  7 
  a. 
  Mandible, 
  with 
  the 
  teeth 
  of 
  the 
  rami 
  in 
  natural 
  position, 
  as 
  seen 
  from 
  

   below; 
  the 
  specimen 
  represented 
  as 
  discovered 
  in 
  the 
  limestone 
  matrix. 
  

   St. 
  Louis; 
  Alton, 
  111. 
  Mr. 
  Van 
  Home. 
  

   /3okC» 
  Fig. 
  8 
  a. 
  Mandibular 
  posterior 
  and 
  median 
  teeth 
  of 
  the 
  right 
  ramus 
  of 
  the 
  foregoing 
  

  

  specimen, 
  seen 
  from 
  above. 
  

   /3 
  D 
  (? 
  / 
  J 
  Fig. 
  9 
  a. 
  The 
  posterior 
  tooth 
  of 
  left 
  ramus 
  of 
  above 
  example, 
  seen 
  from 
  above; 
  9 
  b 
  

   do., 
  profile 
  outline 
  from 
  antero-lateral 
  border. 
  

   Fig. 
  10 
  a. 
  Mandibular 
  median 
  tooth, 
  associated 
  with 
  9 
  a, 
  seen 
  from 
  above; 
  10 
  b 
  do., 
  

   profile 
  and 
  outline 
  frompostero-lateral 
  border. 
  

  

  Cochliodus 
  Leidyi, 
  St. 
  J. 
  and 
  W 
  127 
  

  

  Fig. 
  11 
  a. 
  Maxillary 
  posterior 
  tooth, 
  right 
  ramus, 
  views 
  from 
  above. 
  Chester 
  lime- 
  

   stone; 
  Chester, 
  111. 
  Prof. 
  Worthen. 
  

   Fig. 
  12 
  a. 
  Same 
  form, 
  left 
  ramus, 
  from 
  above; 
  12 
  b 
  do., 
  from 
  inner 
  margin; 
  12 
  c 
  do., 
  

   outer 
  inrolled 
  margin; 
  12 
  d 
  do., 
  foreshortened 
  view 
  from 
  antero-lateral 
  

   border. 
  Chester 
  limestone; 
  Evansville, 
  111. 
  Dr. 
  Hambach. 
  

   Fig. 
  13 
  a, 
  Maxillary 
  median 
  series 
  of 
  left 
  ramus, 
  seen 
  from 
  above; 
  13 
  b 
  do., 
  from 
  inner 
  

   margin; 
  13 
  c 
  do., 
  outer 
  margin; 
  13 
  d 
  do., 
  profile 
  from 
  antero-lateral 
  bor- 
  

   der; 
  13 
  e 
  do., 
  inferior 
  surface, 
  showing 
  basal 
  support 
  without 
  transverse 
  

   sutures. 
  Chester; 
  Chester, 
  111. 
  Prof. 
  Worthen. 
  

   Fig. 
  14 
  a. 
  Mandibular 
  posterior 
  tooth, 
  left 
  ramus, 
  a 
  large, 
  imperfect 
  example, 
  from 
  

   above. 
  Chester 
  limestone; 
  Prairie 
  du 
  Long, 
  111. 
  Prof. 
  Worthen. 
  

   j-W 
  Fig. 
  15 
  a. 
  A 
  smaller 
  perfect 
  example 
  of 
  same 
  form, 
  right 
  ramus, 
  viewed 
  from 
  above; 
  * 
  

  

  15 
  b 
  do., 
  from 
  inner 
  margin; 
  15 
  c 
  do., 
  outer 
  margin; 
  15 
  d 
  do., 
  from 
  antero- 
  

   lateral 
  border, 
  foreshortened. 
  Chester; 
  Chester, 
  111. 
  Mr. 
  Van 
  Home. 
  

  

  Fig. 
  16 
  a. 
  Mandibular 
  median 
  tooth, 
  right 
  ramus, 
  view 
  from 
  above, 
  outline 
  restored; 
  

  

  16 
  b 
  do., 
  from 
  inner 
  margin; 
  16 
  c 
  do., 
  outer 
  inrolled 
  margin; 
  16 
  d 
  do., 
  from 
  

   postero-lateral 
  border. 
  Chester 
  limestone; 
  Chester, 
  111. 
  Prof. 
  Worthen. 
  

  

  Cochliodus 
  obliquus, 
  St. 
  J. 
  and 
  W 
  125 
  

  

  / 
  Fig. 
  17 
  a. 
  Maxillary 
  posterior 
  tooth, 
  left 
  ramus, 
  viewed 
  from 
  above, 
  enlarged; 
  17 
  b 
  do., 
  

   from 
  the 
  antero-lateral 
  border; 
  17 
  c 
  do., 
  postero-lateral 
  border. 
  St. 
  Louis 
  

   limestone; 
  St. 
  Louis, 
  Mo. 
  Mr. 
  St. 
  John. 
  

  

  