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  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  95 
  

  

  anterodistal 
  surface 
  for 
  attachment 
  of 
  flexor 
  muscles 
  for 
  the 
  

   manus 
  and 
  forearm. 
  

  

  The 
  radius 
  and 
  ulna 
  are 
  longer 
  than 
  in 
  Limnocyon 
  verus 
  

   and 
  noticeably 
  curved. 
  Both 
  elements 
  are 
  noticeably 
  flattened 
  

   transversely 
  and 
  anteroposteriorly 
  expanded 
  in 
  their 
  distal 
  por- 
  

   tions, 
  although 
  a 
  part 
  of 
  this 
  is 
  recognized 
  as 
  due 
  to 
  crushing. 
  The 
  

   olecranon 
  of 
  the 
  ulna 
  is 
  relatively 
  robust 
  and 
  bent 
  somev^^hat 
  

   inward 
  but 
  is 
  not 
  so 
  long 
  as 
  in 
  L. 
  verus. 
  The 
  shaft 
  of 
  the 
  ulna 
  is 
  

   not 
  convex 
  anteriorly, 
  as 
  described 
  for 
  L. 
  verus, 
  but, 
  if 
  anything, 
  

   is 
  concave 
  anteriorly. 
  The 
  radius 
  shows 
  a 
  compound 
  curve, 
  con- 
  

   cave 
  forward 
  in 
  the 
  proximal 
  portion 
  and 
  convex 
  forward 
  in 
  the 
  

   medial 
  and 
  distal 
  portions. 
  The 
  proximal 
  portion 
  of 
  the 
  radius 
  

   also 
  has 
  a 
  well-developed 
  bicipital 
  tuberosity, 
  turned 
  slightly 
  

   inward 
  from 
  the 
  shaft 
  of 
  the 
  ulna, 
  for 
  insertion 
  of 
  the 
  biceps. 
  

   Moreover, 
  the 
  distal 
  portion 
  of 
  the 
  radius 
  is 
  very 
  much 
  expanded 
  

   anteromedially 
  above 
  the 
  prominent 
  styloid 
  process. 
  This 
  ex- 
  

   pansion 
  supports 
  the 
  place 
  of 
  insertion 
  for 
  the 
  distal 
  end 
  of 
  the 
  

   supinator 
  longus 
  muscle 
  which 
  had 
  its 
  origin 
  on 
  the 
  well-developed 
  

   supinator 
  ridge 
  of 
  the 
  humerus. 
  

  

  Remains 
  of 
  the 
  manus 
  include 
  the 
  scapholunar 
  and 
  the 
  third 
  

   and 
  fifth 
  metacarpals. 
  The 
  scaphoid, 
  lunar, 
  and 
  centrale 
  are 
  

   fused, 
  although 
  a 
  groove 
  showing 
  the 
  line 
  of 
  separation 
  between 
  

   the 
  scaphoid 
  and 
  lunar 
  can 
  be 
  seen 
  across 
  a 
  portion 
  of 
  the 
  radial 
  

   facet. 
  The 
  distal 
  facets 
  for 
  articulation 
  with 
  the 
  magnum, 
  unci- 
  

   form, 
  and 
  trapezoid 
  are 
  deeply 
  concave 
  and 
  separated 
  from 
  one 
  

   another 
  by 
  sharp 
  angles. 
  The 
  metacarpals 
  appear 
  short 
  and 
  

   stout, 
  a 
  characteristic 
  noted 
  in 
  machairodonts 
  in 
  comparison 
  with 
  

   true 
  felids. 
  

  

  Table 
  2. 
  — 
  Measurevients 
  (in 
  millimeters) 
  of 
  the 
  limb 
  bones 
  of 
  Machaeroides 
  

   eothen, 
  U. 
  S. 
  N. 
  M. 
  No. 
  17059 
  

  

  LetiBth 
  of 
  humerus 
  104 
  

  

  Anteroposterior 
  diameter 
  of 
  proximal 
  end 
  of 
  humerus 
  ... 
  26.5 
  

  

  Transver.se 
  diameter 
  of 
  proximal 
  end 
  of 
  humerus 
  across 
  tuberosities 
  28 
  

  

  Transverse 
  diameter 
  of 
  distal 
  end 
  of 
  humerus 
  81,6 
  

  

  Greatest 
  length 
  of 
  radius 
  78,g 
  

  

  Greatest 
  diamster 
  of 
  proximal 
  end 
  of 
  radius 
  13.5 
  

  

  Greatest 
  diameter 
  of 
  distal 
  end 
  of 
  radius 
  ... 
  I8.8 
  

  

  Lengtli 
  of 
  ulna 
  102 
  

  

  Anteroposterior 
  diameter 
  of 
  olecranon 
  below 
  tuberosities 
  13.6 
  

  

  Greatest 
  diameter 
  of 
  distal 
  end 
  of 
  ulna 
  13 
  

  

  Greatest 
  lenslh 
  of 
  scapholunar 
  Ig 
  

  

  Length 
  of 
  metacarpal 
  III 
  27 
  

  

  Length 
  of 
  metacarpal 
  V 
  21 
  

  

  Length 
  of 
  femur 
  parallel 
  to 
  axis 
  of 
  shaft 
  118 
  

  

  Diameter 
  of 
  proximal 
  end 
  of 
  femur 
  across 
  head 
  and 
  greater 
  trochanter, 
  perpendicular 
  

  

  to 
  axis 
  of 
  shaft 
  ^ 
  35 
  

  

  Transverse 
  diameter 
  of 
  shaft 
  of 
  femur 
  at 
  midsection 
  17.5 
  

  

  Transverse 
  diameter 
  of 
  distal 
  end 
  of 
  femur 
  across 
  condyles, 
  excludine 
  tuberosities 
  18 
  

  

  Transverse 
  diameter 
  of 
  disUl 
  end 
  of 
  femur 
  across 
  tuberosities 
  IS 
  

  

  