﻿36 
  

  

  ACTINOPTERTGII. 
  

  

  Fig. 
  7. 
  

  

  Parasphenoid 
  of 
  Gyrosteus 
  mirabilis, 
  inferior 
  aspect, 
  one-fourth 
  

   nat. 
  size. 
  [No. 
  P. 
  2262 
  a.] 
  

  

  Fig. 
  8. 
  

  

  Parasphenoid 
  of 
  the 
  recent 
  Jcipenser, 
  inferior 
  aspect. 
  

  

  P. 
  3356 
  g. 
  More 
  imperfect 
  parasphenoid 
  associated 
  with 
  other 
  

   fragments. 
  EnnisHllen 
  Coll. 
  

  

  P. 
  3356 
  a, 
  h. 
  Two 
  examples 
  of 
  the 
  hyomandibular, 
  ossified 
  appa- 
  

   rently 
  as 
  far 
  as 
  the 
  distal 
  border, 
  the 
  first 
  shown 
  of 
  one- 
  

   third 
  the 
  natural 
  size, 
  from 
  the 
  lateral 
  and 
  posterior 
  

   aspects, 
  in 
  fig. 
  9 
  ; 
  described 
  and 
  figured 
  loc. 
  cit. 
  pp. 
  32, 
  33, 
  

   fi 
  g- 
  2 
  ' 
  EnnisMllen 
  Coll. 
  

  

  P. 
  3356 
  k. 
  Hyomandibular 
  probably 
  of 
  young, 
  wanting 
  the 
  ossifi- 
  

   cation 
  of 
  the 
  expanded 
  extremities. 
  EnnisHllen 
  Coll. 
  

  

  