﻿8 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.67 
  

  

  ls 
  similarly 
  displaced, 
  but 
  the 
  other 
  sutures 
  of 
  the 
  occipital 
  are 
  not 
  

   traceable. 
  Because 
  of 
  the 
  fact 
  that 
  so 
  few 
  of 
  the 
  individual 
  bones 
  

   of 
  the 
  cranium 
  can 
  be 
  denned, 
  it 
  is 
  impossible 
  to 
  tell 
  whether 
  the 
  

   lateral 
  shortness 
  of 
  the 
  right 
  mastoid 
  and 
  exoccipital, 
  which 
  also 
  

   means 
  the 
  lambdoidal 
  crest 
  upon 
  this 
  side, 
  is 
  due 
  entirely 
  to 
  the 
  

   effect 
  of 
  the 
  cervical 
  muscles 
  involved, 
  or 
  also 
  to 
  that 
  of 
  the 
  tem- 
  

   poral. 
  In 
  all 
  probability 
  both 
  have 
  contributed 
  to 
  the 
  existing 
  state 
  

   < 
  if 
  affairs. 
  It 
  also 
  seems 
  likely 
  that 
  the 
  right 
  cervical 
  musles 
  pre- 
  

   viously 
  enumerated 
  were 
  relatively 
  weak. 
  

  

  The 
  medial 
  portion 
  of 
  the 
  right 
  petrous 
  temporal 
  has 
  been 
  ad- 
  

   vanced 
  several 
  millimeters, 
  with 
  corresponding 
  displacement 
  of 
  the 
  

   origins 
  of 
  the 
  palati 
  muscles. 
  The 
  origin 
  of 
  the 
  light 
  internal 
  ptery- 
  

   goid 
  is 
  larger 
  than 
  the 
  left, 
  but 
  the 
  difference 
  is 
  not 
  of 
  greater 
  

   degree 
  than 
  occurs 
  in 
  symmetrical 
  skulls. 
  The 
  right 
  curve 
  of 
  the 
  

   palatal 
  shelf 
  extends 
  slightly 
  farther 
  craniad 
  than 
  the 
  left, 
  indicat- 
  

   ing 
  a 
  corresponding 
  disparity 
  between 
  the 
  insertions 
  of 
  the 
  two 
  

   tensor 
  palati 
  muscles. 
  

  

  An 
  examination 
  of 
  the 
  superior 
  aspect 
  of 
  the 
  skull 
  at 
  once 
  dis- 
  

   closes 
  the 
  fact 
  that 
  the 
  right 
  temporal 
  fossa 
  as 
  a 
  whole 
  is 
  consider- 
  

   ably 
  smaller 
  than 
  the 
  left. 
  It 
  is 
  not 
  less 
  deep, 
  to 
  any 
  appreciable 
  

   extent, 
  but 
  the 
  sagittal 
  crest 
  is 
  displaced 
  toward 
  the 
  right 
  and 
  the 
  

   right 
  lambdoidal 
  crest 
  is 
  shorter. 
  The 
  fact 
  is 
  disclosed, 
  however, 
  

   that 
  the 
  anterior 
  part 
  of 
  the 
  right 
  temporal 
  was 
  of 
  greater 
  mass 
  than 
  

   upon 
  the 
  left. 
  This 
  resulted 
  in 
  the 
  displacement, 
  in 
  both 
  anterior 
  

   and 
  lateral 
  directions, 
  of 
  the 
  right 
  frontal, 
  now 
  best 
  shown 
  by 
  the 
  

   position 
  of 
  the 
  supraorbital 
  ridging. 
  The 
  origin 
  of 
  this 
  part 
  of 
  the 
  

   muscle 
  is 
  thus 
  more 
  extensive 
  upon 
  the 
  right 
  side, 
  and 
  it 
  may 
  well 
  

   have 
  been 
  thicker 
  also. 
  

  

  For 
  certain 
  work 
  the 
  right 
  side 
  of 
  the 
  jaw 
  must 
  have 
  been 
  favored 
  

   to 
  a 
  marked 
  degree. 
  The 
  right 
  condylar 
  articulation 
  was 
  either 
  

   permanently 
  painful 
  when 
  stressed, 
  which 
  I 
  am 
  inclined 
  to 
  doubt, 
  

   or 
  what 
  is 
  more 
  likely, 
  there 
  was 
  some 
  mechanical 
  handicap 
  to 
  its 
  

   use, 
  such 
  as 
  lesions 
  of 
  the 
  ligaments 
  or 
  condylar 
  capsule, 
  causing 
  the 
  

   animal 
  to 
  rely 
  largely 
  upon 
  the 
  left 
  side 
  of 
  the 
  jaw. 
  It 
  seems 
  

   certain 
  that 
  this 
  is 
  the 
  proper 
  explanation 
  for 
  the 
  fact 
  that 
  the 
  pos- 
  

   terior 
  part 
  of 
  the 
  right 
  temporal 
  muscle 
  was 
  smaller 
  than 
  the 
  left. 
  

   The 
  fact 
  that 
  the 
  anterior 
  part 
  of 
  the 
  right 
  temporal 
  was 
  larger 
  than 
  

   the 
  corresponding 
  portion 
  of 
  the 
  left 
  is 
  somewhat 
  unexpected. 
  It 
  

   would 
  be 
  entirely 
  logical 
  were 
  the 
  temporal 
  muscle 
  divisible 
  into 
  an 
  

   anterior 
  and 
  a 
  posterior 
  part, 
  but 
  according 
  to 
  Sonntag 
  8 
  the 
  division 
  is 
  

   rather 
  into 
  a 
  superficial 
  and 
  a 
  deep 
  portion. 
  The 
  vacuity 
  of 
  the 
  tem- 
  

   poral 
  fossa, 
  inclosed 
  by 
  the 
  zygomatic 
  arch, 
  is 
  shorter 
  and 
  broader 
  

   i 
  transversely) 
  upon 
  the 
  right 
  side, 
  and 
  as 
  the 
  two 
  zygomatic 
  arches 
  

  

  ' 
  Sonntag, 
  C. 
  F., 
  The 
  morphology 
  and 
  evolution 
  of 
  the 
  apes 
  and 
  man, 
  London, 
  1924, 
  pp. 
  1-364. 
  

  

  