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  H. 
  G. 
  SEELET 
  ON 
  NEUSTICOSAURTJS 
  PTJSILLTJS. 
  

  

  larger 
  animal's 
  femur 
  is 
  ovate. 
  The 
  distal 
  end, 
  1^ 
  mm. 
  thick, 
  is 
  

   compressed 
  from 
  front 
  to 
  back, 
  flattened 
  inferiorly, 
  with 
  a 
  sharp 
  

  

  Fig. 
  3. 
  — 
  Comparison 
  of 
  Hind 
  Limbs 
  of 
  Neusticosaurus 
  and 
  

   Plesiosanrus. 
  

  

  A. 
  Neusticosaurus 
  pusillus. 
  

  

  B. 
  Plesiosanrus 
  Hawkinsii. 
  

  

  ridge 
  margining 
  the 
  inferior 
  external 
  border 
  in 
  its 
  distal 
  half 
  ; 
  the 
  

   external 
  side 
  is 
  oblique 
  and 
  rounded 
  distally, 
  and 
  separated 
  by 
  a 
  

   ridge 
  from 
  the 
  superior 
  aspect 
  of 
  the 
  bone. 
  Proximally 
  the 
  lateral 
  

   aspect 
  of 
  the 
  bone 
  widens 
  in 
  a 
  wedge 
  shape 
  to 
  4 
  mm. 
  ; 
  its 
  inferior 
  

   aspect 
  is 
  flat 
  and 
  forms 
  nearly 
  a 
  right 
  angle 
  with 
  the 
  lateral 
  surface, 
  

   which 
  is 
  slightly 
  convex 
  ; 
  the 
  superior 
  aspect 
  appears 
  to 
  be 
  flattened. 
  

   There 
  is 
  no 
  indication 
  exposed 
  of 
  an 
  articular 
  condyle 
  to 
  the 
  

   proximal 
  end, 
  such 
  as 
  might 
  have 
  been 
  expected 
  from 
  a 
  longitudinal 
  

   ridge 
  running 
  down 
  the 
  underside 
  of 
  the 
  shaft. 
  The 
  tibia 
  and 
  

   fibula 
  are 
  about 
  11 
  mm. 
  long 
  in 
  the 
  larger 
  individual, 
  and 
  1 
  mm. 
  

   less 
  in 
  the 
  small 
  one 
  ; 
  and, 
  in 
  harmony 
  with 
  the 
  positions 
  of 
  the 
  

   skeletons, 
  one 
  exhibits 
  the 
  anterior, 
  the 
  other 
  the 
  posterior 
  aspect 
  

   of 
  the 
  bones 
  ; 
  but 
  both 
  bones 
  are 
  unduly 
  slender 
  in 
  the 
  small 
  speci- 
  

   men. 
  In 
  the 
  larger 
  animal 
  the 
  tibia 
  has 
  a 
  massive 
  appearance 
  : 
  its 
  

  

  