﻿98 
  ACTINOPTERYGII. 
  

  

  the 
  premaxilla 
  and 
  maxilla, 
  the 
  latter 
  element 
  with 
  a 
  

   concavely 
  arched 
  oral 
  border 
  and 
  shaped 
  as 
  in 
  L. 
  latifrons. 
  

   Below 
  and 
  behind 
  the 
  mandible 
  there 
  occur 
  portions 
  of 
  

   the 
  ceratohyal 
  and 
  epihyal 
  ; 
  and 
  the 
  cranial 
  roof-bones, 
  

   besides 
  the 
  operculum, 
  are 
  shown 
  to 
  be 
  tuberculated. 
  

   The 
  serration 
  of 
  the 
  principal 
  flank-scales 
  is 
  very 
  con- 
  

   spicuous. 
  Egerton 
  Coll. 
  

  

  8047. 
  Imperfect 
  head 
  and 
  abdominal 
  region, 
  equalling 
  the 
  pre- 
  

   ceding 
  (P. 
  2006 
  a) 
  in 
  size. 
  The 
  tuberculations 
  upon 
  the 
  

   cranial 
  and 
  facial 
  bones 
  are 
  exhibited, 
  and 
  the 
  clavicle 
  is 
  

   preserved 
  behind. 
  The 
  removal 
  of 
  part 
  of 
  the 
  squamation 
  

   of 
  the 
  right 
  side 
  exposes 
  the 
  long, 
  slender 
  ribs 
  and 
  traces 
  

   of 
  the 
  somewhat 
  stouter 
  neural 
  arches, 
  but 
  no 
  vertebral 
  

   centra. 
  Mantell 
  Coll. 
  

  

  P. 
  6371. 
  Imperfect 
  small 
  fish 
  shortened 
  and 
  deepened 
  by 
  crushing, 
  

   and 
  exhibiting 
  serrated 
  scales. 
  Beekles 
  Coll. 
  

  

  P 
  5591. 
  Imperfect 
  head 
  and 
  trunk 
  of 
  a 
  slightly 
  larger 
  individual 
  

   than 
  no. 
  8047, 
  apparently 
  deeper 
  and 
  with 
  non-serrated 
  

   scales. 
  The 
  teeth 
  exhibited 
  are 
  unusually 
  stout, 
  diminish- 
  

   ing 
  in 
  size 
  in 
  the 
  hinder 
  portion 
  of 
  both 
  jaws. 
  

  

  Harford 
  Coll. 
  

  

  P. 
  4441. 
  Imperfect 
  head 
  and 
  abdominal 
  region 
  of 
  a 
  large 
  fish, 
  with 
  

   the 
  dorsal 
  fin-fulcra 
  and 
  relatively 
  large 
  scales. 
  The 
  

   imperfect 
  coronoid 
  bone 
  is 
  exposed 
  in 
  the 
  mandible. 
  

  

  EnnisJcillen 
  Coll. 
  

  

  P. 
  1118. 
  Portion 
  of 
  a 
  skull, 
  vertically 
  crushed 
  and 
  exposed 
  from 
  

   within, 
  with 
  some 
  of 
  the 
  anterior 
  dorsal 
  scales 
  shown 
  

   from 
  the 
  inner 
  aspect. 
  The 
  parietals 
  and 
  frontals 
  are 
  

   well 
  shown, 
  and 
  the 
  squamosal 
  is 
  preserved 
  on 
  the 
  left 
  

   side. 
  The 
  pair 
  of 
  supratemporal 
  bones 
  considerably 
  

   overlaps 
  the 
  parietals; 
  and 
  between 
  the 
  two 
  post-temporals 
  

   there 
  occurs 
  a 
  small 
  median 
  element, 
  forming 
  the 
  first 
  of 
  

   the 
  dorsal 
  series 
  of 
  ridge-scales. 
  Anteriorly 
  the 
  ascending 
  

   process 
  of 
  each 
  premaxilla 
  is 
  apposed 
  to 
  the 
  inner 
  face 
  of 
  

   the 
  frontal 
  bone 
  of 
  the 
  same 
  side 
  ; 
  and 
  the 
  displaced 
  left 
  

   mandibular 
  ramus 
  shows 
  that 
  the 
  splenial 
  element, 
  in 
  

   addition 
  to 
  the 
  dentary, 
  bore 
  teeth. 
  The 
  inner 
  teeth 
  are 
  

   much 
  stouter 
  than 
  those 
  of 
  the 
  margin 
  of 
  the 
  jaw 
  ; 
  and 
  

   they 
  appear 
  to 
  be 
  in 
  three 
  series 
  on 
  the 
  anterior 
  end 
  

   of 
  the 
  splenial. 
  The 
  circumorbital 
  and 
  suborbital 
  facial 
  

   bones 
  are 
  also 
  in 
  part 
  well 
  displayed. 
  Egerton 
  Coll. 
  

  

  