﻿Vol. 
  53.] 
  

  

  OF 
  THE 
  SKULL 
  OF 
  A 
  PLIOSAUR. 
  

  

  185- 
  

  

  EXPLANATION 
  OF 
  PLATE 
  XII. 
  

   Skull 
  of 
  Pliosaurus 
  ferox 
  (Sauvage) 
  from 
  the 
  Oxford 
  Clay 
  of 
  Peterborough. 
  

   \ 
  Nat. 
  size. 
  

   1. 
  From 
  below. 
  2. 
  From 
  above. 
  

  

  Reference 
  Letters. 
  

  

  col. 
  = 
  columella 
  (epipterygoid). 
  

   e.na. 
  = 
  external 
  nares. 
  

  

  par. 
  for. 
  = 
  parietal 
  foramen. 
  

   pas. 
  = 
  parasphenoid. 
  

  

  i.na. 
  = 
  internal 
  nares. 
  

  

  

  p.f. 
  = 
  post-frontal. 
  

  

  Ju. 
  =jugal. 
  

  

  I. 
  = 
  lachrymal. 
  

  

  mx. 
  = 
  maxilla. 
  

  

  n. 
  ? 
  = 
  nasal 
  (?). 
  

   oc.c. 
  = 
  occipital 
  condyle. 
  

   pal. 
  = 
  palatine. 
  

   par. 
  = 
  parietal. 
  

  

  

  pr.f. 
  = 
  pre-frontal. 
  

   p.mx. 
  = 
  premaxilla. 
  

   p.p.v. 
  = 
  posterior 
  palatine 
  vacuities 
  

   pt. 
  = 
  pterygoid. 
  

   sq. 
  = 
  squamosal. 
  

   s.orb. 
  = 
  supra-orbital. 
  

   vo. 
  = 
  vomer. 
  

  

  

  Discussion. 
  

  

  Mr. 
  Ltdekker 
  and 
  Mr. 
  Mare 
  spoke, 
  and 
  the 
  Author 
  briefly- 
  

   replied. 
  

  

  Q. 
  J. 
  G. 
  S. 
  No. 
  210. 
  

  

  