﻿406 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  Referred 
  specimen. 
  — 
  Trigonid 
  on 
  M2 
  high, 
  height 
  twice 
  that 
  of 
  the 
  

   talonid 
  and 
  nearly 
  twice 
  the 
  length 
  of 
  the 
  tooth, 
  recurved 
  and 
  com- 
  

   pressed 
  anteroposteriorly 
  , 
  pro 
  toconid 
  slightly 
  higher 
  than 
  paraconid 
  and 
  

   metaconid, 
  which 
  are 
  equal, 
  an 
  anterior 
  cingulum 
  present 
  which 
  

   terminates 
  in 
  a 
  small 
  but 
  distinct 
  cusp 
  about 
  the 
  middle 
  of 
  the 
  base 
  of 
  

  

  USNM 
  

   IQ87/ 
  

  

  Figure 
  44. 
  — 
  Occlusal 
  and 
  lateral 
  views 
  of 
  the 
  referred 
  specimen 
  (USNM 
  18871) 
  of 
  Kentro- 
  

   gomphios 
  strophensis, 
  new 
  genus 
  and 
  species. 
  X 
  7. 
  

  

  the 
  paraconid; 
  talonid 
  nearly 
  as 
  long 
  as 
  the 
  trigonid 
  but 
  narrower, 
  

   hypoconid 
  high 
  and 
  with 
  a 
  ridge 
  sloping 
  down 
  to 
  the 
  base 
  of 
  the 
  

   metaconid, 
  height 
  of 
  hypoconid 
  nearly 
  equal 
  to 
  the 
  length 
  of 
  the 
  tooth, 
  

   hypoconulid 
  minute, 
  entoconid 
  nearly 
  obsolete; 
  M3 
  similar 
  to 
  M2 
  but 
  

   smaller 
  and 
  with 
  a 
  narrower 
  talonid. 
  

  

  The 
  portion 
  of 
  the 
  jaw 
  preserved 
  indicates 
  a 
  strong 
  upward 
  curva- 
  

   ture 
  back 
  of 
  the 
  teeth. 
  The 
  massateric 
  fossa 
  is 
  deep 
  and 
  with 
  a 
  very 
  

   prominent 
  anterior 
  rim. 
  

  

  This 
  specimen 
  is 
  referred 
  to 
  this 
  species 
  on 
  the 
  basis 
  of 
  the 
  occlusion 
  

   with 
  the 
  type 
  which 
  is 
  as 
  good 
  as 
  occurs 
  between 
  different 
  specimens 
  of 
  

  

  