﻿216 
  PA 
  L.K 
  ONTOLOGY 
  OF 
  ILLINOIS. 
  

  

  growth, 
  instead 
  of 
  presenting 
  the 
  forward 
  curvature 
  or 
  moderate 
  

   coni 
  iharacteristio 
  of 
  perfect 
  teeth. 
  The 
  anterior 
  margin, 
  ah 
  

  

  shows 
  an 
  accurate 
  outline, 
  with 
  auriculations 
  at 
  either 
  angle, 
  which 
  

   may 
  he 
  attributable 
  in 
  part 
  to 
  wear 
  from 
  the 
  severe 
  a 
  which 
  

  

  the 
  teeth 
  were 
  subjected 
  during 
  the 
  life 
  of 
  their 
  possessor. 
  1 
  

   backward 
  curvature 
  of 
  the 
  lines 
  of 
  growth, 
  which 
  appear 
  to 
  he 
  in- 
  

   dicated 
  by 
  alternating 
  belts 
  Blightly 
  varying 
  in 
  density 
  and 
  hardm 
  

   are 
  the 
  same 
  as 
  above 
  remarked 
  in 
  the 
  maxillary 
  form. 
  

  

  It 
  is 
  a 
  singular, 
  not 
  to 
  say 
  extraordinary, 
  circumstance 
  that 
  none 
  

   hut 
  left-side 
  individuals 
  of 
  the 
  supposed 
  maxillary 
  form 
  and 
  right' 
  

   Bide 
  teeth 
  of 
  the 
  mandible 
  exist 
  in 
  the 
  collection--, 
  which 
  contain 
  a 
  

   score 
  and 
  a 
  half 
  of 
  specimens 
  in 
  all 
  conditions 
  of 
  preservation. 
  

   Supposing 
  the 
  teeth 
  to 
  have 
  been 
  ranged 
  in 
  doable 
  rows 
  upon 
  the 
  

   jaws, 
  the 
  impingement 
  of 
  individuals 
  of 
  opposite 
  rows 
  at 
  their 
  

   oblique 
  articular 
  inner 
  borders 
  gives 
  to 
  the 
  transverse 
  section 
  a 
  

   m 
  irked 
  concavity, 
  while 
  the 
  inbeveled 
  apparent 
  obliquity 
  of 
  the 
  

   anterior 
  and 
  posterior 
  margins 
  indicate 
  a 
  considerable 
  fore 
  and 
  aft 
  

   arching 
  in 
  the 
  coronal 
  contour 
  of 
  the 
  series 
  of 
  maxillary 
  teeth. 
  The 
  

   individuals 
  of 
  the 
  opposed 
  mandibular 
  form, 
  viewed 
  in 
  the 
  same 
  

   relative 
  position, 
  present 
  contour: 
  diametrically 
  opposite 
  to 
  those 
  

   noted 
  in 
  relation 
  to 
  the 
  maxillary 
  Beries, 
  the 
  tran>\ei>. 
  of 
  

  

  the 
  double 
  row 
  showing 
  a 
  convex 
  inning 
  to 
  the 
  concavity 
  

  

  the 
  opposes 
  . 
  though 
  the 
  Longitudinal 
  arching 
  of 
  tl 
  of 
  

  

  the 
  latter 
  form 
  was 
  perceptibly 
  less 
  than 
  that 
  o\ 
  the 
  mandibular 
  

   series. 
  The 
  latter 
  observations 
  apply 
  to 
  the 
  small 
  and 
  medium 
  - 
  

   teeth, 
  hut 
  in 
  the 
  large 
  mature 
  teeth 
  the 
  Longitudinal 
  convexity 
  of 
  

   the 
  crown 
  Beems 
  to 
  lie 
  more 
  pronounced, 
  which 
  would 
  give 
  to 
  the 
  

   ries 
  of 
  teeth 
  upon 
  the 
  jaw 
  a 
  greater 
  relative 
  convexity 
  from 
  be- 
  

   hind 
  Forwards. 
  However, 
  it 
  will 
  have 
  heconie 
  apparent, 
  that 
  tl 
  

   ,. 
  ;,.; 
  ',. 
  londence 
  in 
  the 
  coronal 
  contour 
  and 
  co-ada; 
  

  

  tion 
  of 
  triturating 
  surface 
  in 
  the 
  two 
  forms 
  her, 
  associated 
  under 
  

  

  the 
  same 
  specific 
  tion. 
  And. 
  however 
  lai 
  materials 
  in 
  

  

  ,„,,- 
  p 
  ( 
  . 
  it 
  is 
  hardly 
  more 
  than 
  - 
  

  

  tory 
  of 
  tl 
  tea 
  they 
  repr< 
  Bent. 
  

  

  An 
  imperfeoi 
  tooth 
  from 
  the 
  same 
  form 
  .tion 
  at 
  Grand 
  I:.. 
  

   M, 
  Kindly 
  submitted 
  to 
  n 
  lamination 
  by 
  Prof. 
  E. 
  \. 
  

  

  Strong, 
  ap 
  • 
  be 
  intimately 
  allied 
  to 
  the 
  present 
  ap 
  Phe 
  

  

  . 
  oimen 
  Ide 
  tooth 
  of 
  the 
  mandibular 
  form. 
  f. 
  

  

  which 
  the 
  . 
  aamel 
  lay. 
  t 
  I 
  n 
  exfoliated, 
  tiful 
  

  

  punctal 
  [uite 
  in 
  contrast 
  to 
  thai 
  usual! 
  dent 
  in 
  the 
  

  

  iri 
  and 
  Ulino 
  litiea. 
  The 
  moduli 
  

  

  

  