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  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  The 
  relative 
  proportions 
  of 
  the 
  lobes 
  and 
  other 
  measurements 
  of 
  the 
  

   plastron 
  are 
  clearly 
  shown 
  in 
  table 
  6. 
  

  

  Table 
  4. 
  — 
  Comparative 
  measurements 
  (in 
  millimeters) 
  of 
  neurals 
  of 
  Testudo 
  

  

  praeextans 
  

  

  Table 
  5. 
  — 
  Comparative 
  measurements 
  (in 
  millimeters) 
  of 
  vertebrals 
  of 
  Testudo 
  

  

  praeextans 
  

  

  Table 
  6. 
  — 
  Comparative 
  measurements 
  (in 
  millimeters) 
  of 
  plastra 
  of 
  Testudo 
  

  

  praeextans 
  

  

  The 
  free 
  borders 
  of 
  the 
  plastra 
  in 
  all 
  five 
  specimens 
  are 
  acute, 
  

   except 
  those 
  parts 
  of 
  the 
  borders 
  adjacent 
  to 
  the 
  notches, 
  which 
  

   are 
  thickened 
  and 
  rounded. 
  The 
  posterior 
  lobes 
  are 
  terminated 
  

   behind 
  in 
  two 
  broadly 
  rounded 
  apices 
  separated 
  on 
  the 
  median 
  line 
  

   by 
  wide 
  V-shaped 
  notches. 
  The 
  borders 
  of 
  the 
  apices 
  are 
  usually 
  

   slightly 
  toothed. 
  Likewise, 
  the 
  anterior 
  ends 
  of 
  the 
  epiplastrai 
  lips 
  

   are 
  notched 
  at 
  the 
  center 
  and 
  the 
  borders 
  are 
  toothed 
  with 
  six 
  blunt 
  

   teeth, 
  except 
  in 
  the 
  type 
  of 
  Testudo 
  praeextans, 
  as 
  shown 
  in 
  figure 
  25. 
  

  

  