﻿92 
  ACTINOPTERYGII. 
  

  

  are 
  slender, 
  denticulated, 
  calcified 
  gill-supports. 
  Some 
  

   of 
  the 
  elongated 
  basal 
  bones 
  of 
  the 
  pectoral 
  fin 
  are 
  shown, 
  

   and 
  the 
  coracoid 
  is 
  preserved 
  on 
  the 
  left 
  side. 
  The 
  

   characters 
  of 
  the 
  squamation 
  can 
  be 
  observed, 
  and 
  the 
  

   three 
  enlarged 
  anal 
  scales 
  occur 
  in 
  position. 
  Leeds 
  Coll. 
  

  

  P. 
  6899. 
  Portion 
  of 
  trunk 
  in 
  hard 
  nodule, 
  with 
  associated 
  fragments 
  

   of 
  head 
  and 
  fins; 
  Peterborough. 
  Part 
  of 
  the 
  frontals, 
  

   a 
  portion 
  of 
  the 
  right 
  mandibular 
  ramus, 
  and 
  the 
  right 
  

   quadrate 
  are 
  shown. 
  Fragments 
  of 
  the 
  pectoral, 
  pelvic, 
  

   and 
  dorsal 
  fins 
  occur 
  in 
  position, 
  and 
  the 
  dorsal 
  fulcra 
  are 
  

   seen 
  to 
  be 
  remarkably 
  slender. 
  The 
  caudal 
  fin-rays 
  

   exhibit 
  small 
  patches 
  of 
  enamel 
  ; 
  and 
  the 
  denticulation 
  

   of 
  the 
  scales 
  is 
  especially 
  well 
  displayed. 
  Leeds 
  Coll. 
  

  

  P. 
  6900. 
  Associated 
  set 
  of 
  fragmentary 
  bones 
  and 
  scales, 
  comprising 
  

   left 
  parietal, 
  right 
  frontal, 
  hyomandibular, 
  ceratohyal, 
  

   supraclavicle, 
  &c, 
  and 
  the 
  three 
  anal 
  scales 
  ; 
  Peterborough. 
  

   The 
  portions 
  of 
  clavicle 
  show 
  several 
  longitudinal 
  close 
  

   series 
  of 
  minute 
  denticulations 
  on 
  the 
  middle 
  of 
  its 
  outer 
  

   face. 
  Leeds 
  Coll. 
  

  

  Lepidotus 
  notopterus, 
  Agassiz. 
  

  

  1835-37. 
  Lepidotus 
  notopterus, 
  L. 
  Agassiz, 
  Poiss. 
  Foss. 
  vol. 
  ii. 
  pt. 
  i. 
  

  

  p. 
  257, 
  pi. 
  xxxv. 
  

   1850. 
  Lepidotus 
  notopterus 
  ?, 
  V. 
  Thiolliere, 
  Ann. 
  Sci. 
  phys. 
  & 
  nat. 
  

  

  Lyon, 
  [2] 
  vol. 
  iii. 
  p. 
  138. 
  

   1852. 
  Lepidotus 
  notopterus, 
  F. 
  A. 
  Quenstedt, 
  Handb. 
  Petrefakt. 
  p. 
  197, 
  

  

  pi. 
  xv. 
  fig. 
  4. 
  • 
  

  

  1863. 
  Lepidotus 
  notopterus, 
  A. 
  Wagner, 
  Abh. 
  k. 
  bay. 
  Akad. 
  Wiss., 
  

  

  math.-phys. 
  CI. 
  vol. 
  ix. 
  p. 
  628. 
  

   1873. 
  Lepidotus 
  notopterus 
  ?, 
  V. 
  Thiolliere, 
  Poiss. 
  Foss. 
  Bugey, 
  pt. 
  ii. 
  

  

  p. 
  15, 
  pi. 
  iv. 
  

   1887. 
  Lepidotus 
  notopterus, 
  W. 
  Branco, 
  Abh. 
  geol. 
  Specialk. 
  Preussen 
  

  

  u. 
  Thiiring. 
  Staaten, 
  vol. 
  vii. 
  p. 
  382, 
  pi. 
  viii. 
  fig. 
  5. 
  

   1887. 
  Lepidotus 
  notopterus, 
  K. 
  A. 
  von 
  Zittel, 
  Handb. 
  Palaeont. 
  vol. 
  iii. 
  

  

  p. 
  209, 
  fig. 
  218. 
  

  

  Type. 
  Well-preserved 
  fish 
  ; 
  British 
  Museum. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*4. 
  Length 
  of 
  head 
  with 
  

   opercular 
  apparatus 
  nearly 
  equal 
  to 
  the 
  maximum 
  depth 
  of 
  the 
  

   trunk, 
  and 
  occupying 
  about 
  one-quarter 
  of 
  the 
  total 
  length. 
  Oper- 
  

   culum 
  twice 
  as 
  deep 
  as 
  its 
  maximum 
  breadth, 
  which 
  is 
  contained 
  

   more 
  than 
  three 
  times 
  in 
  the 
  length 
  of 
  the 
  head 
  ; 
  cranial 
  roof-bones 
  

   with 
  few 
  sparse 
  tuberculations 
  ; 
  marginal 
  teeth 
  on 
  much 
  elongated 
  

  

  