﻿362 
  

  

  H. 
  G. 
  SEELET 
  ON 
  NEUSTICOSAUETJS 
  PTJS1LLT7S. 
  

  

  expanded 
  as 
  in 
  the 
  other 
  specimen 
  ; 
  and 
  there 
  is 
  a 
  distinct 
  thickening 
  

   of 
  the 
  shaft 
  in 
  a 
  blunt 
  ridge 
  near 
  the 
  distal 
  articulation, 
  towards 
  its 
  

   middle. 
  The 
  radius 
  is 
  11 
  mm. 
  long. 
  No 
  digits 
  are 
  preserved. 
  

  

  Fig. 
  2. 
  — 
  Comparison 
  of 
  Fore 
  Limbs 
  of 
  Neusticosaurus 
  and 
  

   Plesiosaurus. 
  

  

  A. 
  Keusticosaurus 
  pit 
  stilus. 
  

  

  B. 
  Plesiosaurus 
  Hawkinsii. 
  

  

  The 
  fore 
  limb 
  at 
  first 
  sight 
  suggests 
  nothing 
  but 
  a 
  modified 
  

   Plesiosaurian, 
  in 
  which 
  the 
  forearm 
  is 
  relatively 
  more 
  elongated, 
  

   and 
  the 
  digital 
  bones 
  are 
  fewer 
  than 
  in 
  known 
  forms. 
  These 
  are 
  

   differences 
  such 
  as 
  are 
  well 
  known 
  in 
  certain 
  genera 
  among 
  the 
  

   Cetacea. 
  But 
  when 
  we 
  compare 
  the 
  bones 
  of 
  the 
  fore 
  limb 
  with 
  

   those 
  which 
  von 
  Meyer 
  has 
  referred 
  to 
  Nothosaurus, 
  a 
  marked 
  

   difference 
  is 
  observed 
  in 
  the 
  humerus 
  ; 
  for 
  that 
  bone 
  in 
  Nothosaurus 
  

   has 
  no 
  trace 
  of 
  the 
  Plesiosaurian 
  form, 
  and 
  is 
  essentially 
  the 
  hume- 
  

   rus 
  of 
  a 
  land 
  animal. 
  The 
  difference 
  consists 
  chiefly 
  in 
  expansion 
  

   of 
  the 
  anterior 
  part 
  of 
  the 
  bone 
  towards 
  the 
  distal 
  end. 
  There 
  is 
  

   the 
  same 
  slight 
  proximal 
  curvature 
  of 
  the 
  head 
  of 
  the 
  bone 
  back- 
  

   ward, 
  the 
  same 
  curvature 
  of 
  the 
  posterior 
  margin, 
  the 
  same 
  distal 
  

   foramen 
  on 
  the 
  hinder 
  margin 
  of 
  the 
  bone. 
  And 
  seeing 
  how 
  growth 
  

  

  