﻿90 
  ACTINOPTEETGII. 
  

  

  vertebrae 
  absent. 
  Pin-fulcra 
  slender 
  ; 
  pelvic 
  fins 
  arising 
  considerably 
  

   behind 
  the 
  middle 
  point 
  between 
  the 
  pectoral 
  and 
  anal 
  fins. 
  Scales 
  

   large 
  and 
  smooth 
  ; 
  principal 
  flank-scales 
  about 
  as 
  deep 
  as 
  broad, 
  

   with 
  conspicuous 
  denticulations 
  on 
  the 
  hinder 
  border 
  ; 
  caudal 
  flank- 
  

   scales 
  with 
  a 
  much-produced 
  postero-inferior 
  angle. 
  

   Form. 
  $• 
  Loc. 
  Oxfordian 
  : 
  Huntingdonshire. 
  

  

  P. 
  6841. 
  An 
  imperfect 
  disarticulated 
  skeleton, 
  the 
  type 
  specimen 
  ; 
  

   Peterborough. 
  The 
  principal 
  bones 
  of 
  the 
  head 
  and 
  

   opercular 
  apparatus 
  are 
  described 
  and 
  figured 
  loc. 
  cit. 
  

   There 
  are 
  many 
  portions 
  of 
  ribs 
  and 
  neural 
  arches, 
  but, 
  

   except 
  the 
  doubtful 
  fragment 
  attached 
  to 
  the 
  basioccipital 
  

   bone, 
  there 
  are 
  no 
  traces 
  of 
  ring-vertebrae. 
  Leeds 
  Coll. 
  

  

  P. 
  6838. 
  Nearly 
  complete 
  fish, 
  much 
  fractured 
  ; 
  Peterborough. 
  

   The 
  right 
  maxilla 
  is 
  preserved 
  as 
  described 
  and 
  figured, 
  

   loc. 
  cit. 
  p. 
  562, 
  pi. 
  xlix. 
  fig. 
  2, 
  and 
  the 
  splenial 
  bone, 
  with 
  

   its 
  robust 
  elongated 
  teeth, 
  is 
  shown 
  in 
  position 
  in 
  the 
  

   mandible 
  ; 
  the 
  bases 
  of 
  some 
  of 
  the 
  large 
  hinder 
  vomerine 
  

   teeth 
  are 
  also 
  exposed. 
  The 
  tuberculations 
  upon 
  the 
  

   frontals 
  and 
  the 
  operculum 
  are 
  stronger 
  and 
  more 
  closely 
  

   arranged 
  than 
  in 
  the 
  type 
  specimen. 
  The 
  bases 
  of 
  the 
  

   pectoral 
  fins 
  are 
  preserved, 
  and 
  some 
  of 
  the 
  hinder 
  rays 
  

   on 
  the 
  right 
  side 
  are 
  nearly 
  complete; 
  the 
  right 
  pelvic 
  

   fin 
  is 
  very 
  incomplete, 
  but 
  in 
  position, 
  and 
  there 
  are 
  frag- 
  

   ments 
  of 
  the 
  anal 
  and 
  caudal 
  fins. 
  The 
  characters 
  of 
  the 
  

   squamation 
  can 
  be 
  observed, 
  and 
  the 
  three 
  enlarged 
  anal 
  

   scales 
  occur 
  in 
  position. 
  Leeds 
  Coll. 
  

  

  P. 
  6840. 
  An 
  associated 
  series 
  of 
  scales, 
  with 
  some 
  bones 
  of 
  the 
  

   head 
  and 
  pectoral 
  arch, 
  and 
  ribs 
  ; 
  Peterborough. 
  The 
  

   parasphenoid, 
  metapterygoid, 
  and 
  hyomandibular 
  are 
  

   described 
  and 
  figured 
  loc. 
  cit. 
  pp. 
  561, 
  562, 
  woodc. 
  figs. 
  3, 
  6, 
  

   pi. 
  1. 
  fig. 
  2. 
  Leeds 
  Coll. 
  

  

  Lepidotus 
  macrocheirus, 
  Egerton. 
  

  

  1845. 
  Lepidotus 
  macrochirusj 
  Sir 
  P. 
  Egerton, 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  

   vol. 
  i. 
  p. 
  230. 
  

  

  Type. 
  Imperfect 
  fish, 
  ventral 
  aspect 
  ; 
  British 
  Museum. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*7 
  ; 
  form 
  and 
  proportions 
  

   unknown, 
  but 
  trunk 
  apparently 
  very 
  robust 
  and 
  head 
  with 
  opercular 
  

   apparatus 
  occupying 
  about 
  one-fifth 
  of 
  the 
  total 
  length 
  of 
  the 
  fish. 
  

   External 
  bones 
  more 
  or 
  less 
  feebly 
  rugose 
  and 
  finely 
  tuberculated, 
  

   but 
  in 
  great 
  part 
  smooth 
  ; 
  parietal 
  bones 
  somewhat 
  less 
  than 
  half 
  

  

  