﻿ISCHIUM 
  OF 
  OBNITHOPSIS 
  ETJCAMEBOTTJ8. 
  373 
  

  

  of 
  the 
  many 
  fragments 
  into 
  which 
  they 
  were 
  broken. 
  This 
  has 
  now 
  

   been 
  accomplished 
  by 
  the 
  skilful 
  mason 
  of 
  the 
  national 
  museum, 
  

   under 
  the 
  instruction 
  of 
  Mr. 
  Davies, 
  who 
  has 
  succeeded 
  beyond 
  my 
  

   expectation 
  in 
  joining 
  together 
  these 
  valuable 
  relics. 
  

  

  The 
  Os 
  Pubis 
  (PI. 
  XIV. 
  fig. 
  1, 
  P) 
  is 
  an 
  oblong 
  flattened 
  bar 
  73 
  

   centim. 
  (28§ 
  in.) 
  long, 
  with 
  a 
  breadth 
  of 
  28*6 
  centim. 
  (11-| 
  in.) 
  

   and 
  27*5 
  centim. 
  (10-J 
  in.) 
  at 
  its 
  proximal 
  and 
  distal 
  ends, 
  and 
  

   of 
  23 
  centim. 
  (9-A- 
  in.) 
  at 
  its 
  middle, 
  where, 
  however, 
  the 
  posterior 
  

   border 
  is 
  mutilated. 
  The 
  proximal 
  end 
  is 
  divided 
  into 
  two 
  parts. 
  

   Of 
  these, 
  the 
  posterior, 
  10*1 
  centim. 
  (4 
  in.) 
  long 
  by 
  5-5 
  centim. 
  

   (2-L 
  in.) 
  wide, 
  is 
  an 
  arc 
  of 
  a 
  large 
  circle 
  ; 
  it 
  is 
  smooth, 
  and 
  evidently 
  

   formed 
  part 
  of 
  the 
  circumference 
  of 
  the 
  acetabulum. 
  The 
  other 
  part 
  

   of 
  the 
  proximal 
  end, 
  anterior 
  in 
  position 
  to 
  that 
  just 
  described, 
  is 
  19 
  

   centim. 
  (7g 
  in.) 
  long, 
  and 
  7-5 
  centim. 
  (3 
  in.) 
  wide 
  at 
  its 
  middle, 
  from 
  

   which 
  its 
  width 
  decreases 
  forwards 
  to 
  the 
  angle 
  where 
  the 
  end 
  meets 
  

   the 
  anterior 
  border 
  of 
  the 
  bone 
  ; 
  this 
  part, 
  now 
  somewhat 
  damaged, 
  

   was 
  evidently 
  united 
  to 
  the 
  pubic 
  process 
  of 
  the 
  ilium. 
  The 
  anterior 
  

   border, 
  fortunately 
  entire, 
  stouter 
  than 
  the 
  posterior, 
  is 
  slightly 
  in- 
  

   curved 
  near 
  the 
  ends, 
  and 
  intermediately 
  throughout 
  nearly 
  its 
  whole 
  

   length 
  almost 
  straight. 
  The 
  posterior 
  border, 
  for 
  a 
  space 
  of 
  20*3 
  

   centim. 
  (8 
  in.) 
  from 
  the 
  obtuse 
  angle 
  it 
  makes 
  with 
  the 
  upper 
  end 
  of 
  

   the 
  bone, 
  is 
  nearly 
  straight, 
  and 
  throughout 
  this 
  extent 
  it 
  articulates 
  

   with 
  the 
  ischium. 
  Below 
  this 
  articular 
  portion 
  the 
  remainder 
  of 
  

   the 
  border, 
  non- 
  articular, 
  takes 
  first 
  a 
  deep 
  incurve, 
  and 
  then 
  curves 
  

   outwards 
  with 
  the 
  widening 
  of 
  the 
  bone 
  at 
  its 
  distal 
  end. 
  This 
  

   strong 
  incurve 
  of 
  the 
  border 
  between 
  the 
  two 
  ends 
  appears 
  to 
  have 
  

   been 
  interrupted 
  at 
  its 
  middle 
  by 
  a 
  slight 
  projection, 
  where 
  also 
  

   is 
  a 
  slight 
  inflexion 
  of 
  the 
  border 
  towards 
  the 
  interior 
  of 
  the 
  pelvis. 
  

   The 
  exact 
  form 
  of 
  this 
  part 
  is 
  no 
  further 
  ascertainable, 
  some 
  

   pieces 
  having 
  been 
  broken 
  off 
  and 
  lost. 
  The 
  distal 
  end 
  of 
  the 
  bone, 
  

   now 
  27*5 
  centim. 
  (10J 
  in.) 
  across, 
  was 
  originally 
  wider, 
  as 
  the 
  pos- 
  

   terior 
  angle 
  is 
  mutilated. 
  It 
  is 
  stout, 
  being 
  at 
  the 
  middle 
  9 
  centim. 
  

   (34 
  in.) 
  thick 
  ; 
  and 
  inferiorly, 
  and 
  on 
  its 
  inner 
  aspect, 
  it 
  has 
  the 
  

   roughness 
  indicative 
  of 
  a 
  symphysial 
  union 
  with 
  its 
  fellow 
  bone 
  of 
  the 
  

   other 
  side 
  of 
  the 
  pelvis. 
  

  

  An 
  oval 
  foramen, 
  8*3 
  centim. 
  (3f 
  in.) 
  in 
  its 
  long 
  diameter, 
  pierces 
  

   the 
  pubis 
  near 
  its 
  upper 
  end 
  in 
  the 
  angle 
  included 
  by 
  the 
  acetabular 
  

   and 
  ischiatic 
  margins. 
  

  

  The 
  Ischium 
  (PL 
  XIV. 
  fig. 
  1, 
  Is.) 
  is 
  a 
  narrower, 
  stouter, 
  and 
  more 
  

   curved 
  bar 
  than 
  the 
  os 
  pubis, 
  than 
  which 
  it 
  is 
  also 
  shorter, 
  a 
  straight 
  

   line 
  joining 
  its 
  extreme 
  points 
  measuring 
  Q5 
  centim. 
  (25-| 
  in.). 
  Its 
  

   greatest 
  breadth 
  nearly 
  in 
  the 
  mid-level 
  of 
  the 
  pubic 
  articulation 
  is 
  

   19 
  centim. 
  (7^ 
  in.), 
  its 
  distal 
  end 
  is 
  17'7 
  centim. 
  (7 
  in.) 
  wide, 
  and 
  the 
  

   middle 
  is 
  its 
  narrowest 
  part, 
  being 
  somewhat 
  more 
  than 
  10 
  centim. 
  

   (3^ 
  in.) 
  across. 
  Its 
  upper 
  end, 
  like 
  that 
  of 
  the 
  os 
  pubis, 
  consists 
  of 
  

   two 
  parts. 
  Of 
  these, 
  the 
  posterior, 
  very 
  stout, 
  rises 
  high 
  above 
  the 
  

   other. 
  It 
  has 
  a 
  rudely 
  oval 
  sectional 
  outline 
  14 
  and 
  7*7 
  centim. 
  

   (o-| 
  and 
  2-f 
  in.) 
  in 
  its 
  two 
  diameters 
  ; 
  and 
  its 
  surface 
  has 
  a 
  roughness 
  

   which 
  plainly 
  speaks 
  of 
  its 
  junction 
  with 
  the 
  ilium. 
  The 
  other 
  part 
  

   of 
  this 
  end 
  lying 
  in 
  front 
  of 
  that 
  just 
  described 
  is 
  a 
  curved, 
  smooth 
  

  

  Q.J.G.S. 
  No. 
  151. 
  2 
  c 
  

  

  