﻿LTCPTOLEPTOJE. 
  529 
  

  

  caudal 
  region. 
  The 
  length 
  of 
  the 
  head 
  with 
  opercular 
  

   apparatus 
  is 
  probably 
  about 
  equal 
  to 
  the 
  maximum 
  depth 
  

   of 
  the 
  trunk, 
  and 
  is 
  contained 
  five 
  times 
  in 
  the 
  total 
  length 
  

   of 
  the 
  fish. 
  The 
  eye 
  is 
  remarkably 
  large, 
  as 
  shown 
  by 
  the 
  

   well-preserved 
  sclerotic. 
  The 
  upturned 
  mouth 
  is 
  bordered 
  

   above 
  by 
  the 
  very 
  small 
  premaxilla, 
  and 
  the 
  long 
  arched 
  

   maxilla 
  which 
  bears 
  minute 
  teeth. 
  The 
  vertebral 
  centra 
  

   are 
  about 
  as 
  long 
  as 
  deep, 
  except 
  towards 
  the 
  base 
  of 
  the 
  

   tail, 
  where 
  they 
  are 
  somewhat 
  longer. 
  One 
  of 
  the 
  haemal 
  

   spines 
  is 
  seen 
  to 
  be 
  considerably 
  expanded. 
  The 
  origin 
  of 
  

   the 
  anal 
  fin 
  is 
  distant 
  0*145 
  from 
  the 
  pectorals 
  and 
  0-09 
  

   from 
  the 
  caudal 
  fin. 
  Fox 
  Coll. 
  

  

  43319. 
  Trunk 
  about 
  0*51 
  in 
  length, 
  wanting 
  head 
  and 
  caudal 
  fin 
  ; 
  

   Purbeck 
  Beds, 
  Swanage. 
  The 
  specimen 
  is 
  very 
  imperfect, 
  

   but 
  the 
  dorsal 
  fin 
  is 
  shown 
  to 
  arise 
  opposite 
  the 
  origin 
  of 
  

   the 
  anal, 
  which 
  has 
  at 
  least 
  23 
  rays. 
  There 
  seem 
  to 
  be 
  

   remains 
  of 
  intermuscular 
  bones 
  below 
  the 
  vertebral 
  column 
  

   in 
  the 
  caudal 
  region. 
  Cunnington 
  Coll. 
  

  

  P. 
  4535-36. 
  Two 
  imperfect 
  examples 
  of 
  a 
  small 
  species 
  with 
  

   remarkably 
  short 
  and 
  deep 
  abdominal 
  vertebrae 
  ; 
  Purbeck 
  

   Beds, 
  Swanage. 
  Enniskillen 
  Coll. 
  

  

  44845. 
  Imperfect 
  head 
  and 
  trunk 
  of 
  the 
  same 
  species 
  : 
  probably 
  

   from 
  Swanage. 
  The 
  preoperculum 
  exhibits 
  a 
  few 
  radiating 
  

   ridges, 
  and 
  the 
  quadrate 
  shows 
  a 
  long 
  hinder 
  process 
  to 
  

   grasp 
  the 
  symplectic. 
  The 
  pelvic 
  bones 
  and 
  fins 
  are 
  well- 
  

   preserved 
  ; 
  while 
  the 
  dorsal 
  fin, 
  with 
  fan-like 
  foremost 
  

   support, 
  arises 
  opposite 
  the 
  origin 
  of 
  the 
  anal. 
  As 
  in 
  the 
  

   three 
  preceding 
  specimens, 
  there 
  seem 
  to 
  be 
  remains 
  of 
  

   intermuscular 
  bones 
  below 
  the 
  vertebral 
  column 
  in 
  the 
  

   caudal 
  region. 
  

  

  Presented 
  by 
  Benjamin 
  Bright, 
  Esq., 
  1873. 
  

  

  P. 
  1121. 
  Fragment 
  of 
  trunk 
  showing 
  characteristic 
  ribs; 
  Purbeck 
  

   Beds, 
  Swanage. 
  Egerton 
  Coll. 
  

  

  The 
  so-called 
  Thrissops 
  propterus 
  (A. 
  Wagner, 
  Abh. 
  k. 
  bay. 
  

   Akad., 
  math.-phys. 
  CI. 
  vol. 
  ix. 
  1863, 
  p. 
  735) 
  from 
  the 
  Lower 
  

   Kimmeridgian 
  (Lithographic 
  Stone) 
  of 
  Eichsta-lt, 
  Bavaria, 
  seems 
  to 
  

   be 
  a 
  species 
  of 
  Leptolepis. 
  The 
  type 
  specimen 
  is 
  in 
  the 
  Palaeonto- 
  

   logical 
  Museum, 
  Munich. 
  

  

  According 
  to 
  the 
  original 
  description, 
  the 
  genus 
  Eurystethus 
  

   (H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  Geol. 
  France, 
  [3] 
  vol. 
  vi. 
  1878, 
  p. 
  629) 
  

  

  PART 
  III. 
  2 
  M 
  

  

  