﻿PACHYCORMTD^:. 
  387 
  

  

  berg. 
  The 
  expanded, 
  fan-shaped 
  haemal 
  spine 
  is 
  shown 
  

   at 
  the 
  base 
  of 
  the 
  tail. 
  Purchased, 
  1845. 
  

  

  18515-16. 
  Remains 
  of 
  large 
  fish 
  about 
  0*34 
  in 
  length, 
  and 
  another 
  

   specimen 
  wanting 
  tail; 
  Boll. 
  Purchased, 
  1844. 
  

  

  20658. 
  Another 
  large 
  specimen, 
  distorted 
  and 
  imperfectly 
  preserved 
  ; 
  

   Boll. 
  Purchased, 
  1846. 
  

  

  P. 
  3718. 
  Two 
  more 
  imperfect 
  specimens, 
  one 
  showing 
  the 
  expanded 
  

   heemal 
  at 
  the 
  base 
  of 
  the 
  caudal 
  fin 
  ; 
  Ohmden, 
  Wiirtem- 
  

   berg. 
  EnnisTcillen 
  Coll. 
  

  

  P. 
  2045 
  a, 
  b. 
  Head 
  and 
  pectoral 
  fin, 
  with 
  portion 
  of 
  abdominal 
  

   region, 
  also 
  an 
  imperfect 
  fish 
  exposed 
  from 
  the 
  ventro- 
  

   lateral 
  aspect 
  ; 
  Ohmden. 
  Egerton 
  Coll. 
  

  

  19646. 
  Imperfect 
  fish 
  ; 
  Ohmden. 
  Purchased, 
  1845. 
  

  

  P. 
  881. 
  Small 
  trunk 
  displaying 
  the 
  median 
  fins 
  and 
  showing 
  the 
  

   enlarged 
  scale 
  at 
  the 
  origin 
  of 
  the 
  anal 
  fin 
  ; 
  Ohmden. 
  

  

  Eyerton 
  Coll. 
  

  

  32424, 
  Large 
  fish 
  originally 
  about 
  0-5 
  in 
  length, 
  but 
  wanting 
  tail 
  ; 
  

  

  Curcy, 
  Normandy. 
  The 
  proportions 
  of 
  the 
  head 
  are 
  

   shown, 
  and 
  a 
  supratemporal 
  plate 
  seems 
  to 
  be 
  one 
  of 
  a 
  

   pair 
  resembling 
  that 
  of 
  Amia. 
  The 
  axial 
  skeleton 
  of 
  the 
  

   trunk 
  is 
  well 
  displayed, 
  and 
  there 
  are 
  a 
  few 
  free 
  fin- 
  

   supports 
  above 
  the 
  sigmoidal 
  neural 
  spines 
  in 
  advance 
  of 
  

   the 
  dorsal 
  fin. 
  The 
  right 
  pectoral 
  fin 
  bears 
  minute 
  

   fulcra. 
  Tesson 
  Coll. 
  

  

  32425, 
  32427, 
  32430-31. 
  Four 
  specimens 
  of 
  moderate 
  size, 
  vari- 
  

  

  ously 
  imperfect 
  ; 
  Curcy. 
  The 
  first 
  two 
  specimens 
  exhibit 
  

   an 
  undigested 
  young 
  Pachy 
  cor 
  mus, 
  and 
  the 
  fourth 
  the 
  

   bones 
  of 
  a 
  Leptolejjis 
  in 
  the 
  stomach. 
  The 
  third 
  shows 
  

   the 
  expanded 
  haemal 
  arch 
  at 
  the 
  base 
  of 
  the 
  tail, 
  and 
  free 
  

   dorsal 
  fin-supports. 
  Tesson 
  Coll. 
  

  

  32426, 
  32428-29. 
  Three 
  large 
  portions 
  of 
  fishes, 
  the 
  first 
  showing 
  

  

  the 
  anal 
  scale 
  and 
  a 
  swallowed 
  small 
  fish, 
  the 
  second 
  

   illustrating 
  the 
  branching 
  of 
  the 
  lateral 
  line 
  on 
  some 
  of 
  

   the 
  anterior 
  scales 
  ; 
  Curcy. 
  Tesson 
  Coll. 
  

  

  32443. 
  Fragmentary 
  small 
  specimen 
  displaying 
  the 
  parasphenoid 
  

   in 
  side 
  view, 
  some 
  of 
  the 
  otic 
  bones, 
  and 
  the 
  axial 
  

   skeleton 
  of 
  the 
  trunk 
  ; 
  Curcy. 
  Tesson 
  Coll. 
  

  

  2c2 
  

  

  