﻿292 
  ACTINOPTEKYGIT. 
  

  

  P. 
  3639. 
  A 
  slightly 
  larger 
  fish, 
  with 
  more 
  imperfect 
  anal 
  and 
  

   caudal 
  fins. 
  The 
  crushed 
  cranium 
  is 
  exposed 
  from 
  below, 
  

   and 
  the 
  maxilla 
  is 
  complete, 
  only 
  broken 
  across 
  at 
  one 
  

   point 
  ; 
  the 
  large 
  teeth 
  are 
  conspicuous 
  on 
  the 
  prem 
  axillae, 
  

   as 
  also 
  on 
  the 
  left 
  dentary 
  ; 
  and 
  below 
  the 
  mandible 
  the 
  

   great 
  extent 
  of 
  the 
  gular 
  plate 
  is 
  displayed. 
  There 
  are 
  

   indications 
  of 
  slender 
  ribs 
  in 
  the 
  abdominal 
  region, 
  and 
  

   the 
  fish 
  seems 
  to 
  have 
  swallowed 
  a 
  Pholidophorus. 
  The 
  

   squamation 
  is 
  well 
  preserved, 
  and 
  the 
  dorsal 
  fin 
  almost 
  

   complete. 
  EnnisMllen 
  Coll. 
  

  

  P. 
  3642. 
  A 
  smaller 
  fish, 
  more 
  fractured, 
  showing 
  much 
  of 
  the 
  

   abdominal 
  squamation 
  from 
  the 
  inner 
  aspect 
  and 
  display- 
  

   ing 
  the 
  robust 
  peg-and-socket 
  articulation 
  of 
  the 
  flank- 
  

   scales. 
  Enniskillen 
  Coll. 
  

  

  38120. 
  Fish 
  about 
  0*42 
  in 
  length, 
  shown 
  from 
  the 
  ventral 
  aspect. 
  

   The 
  marginal 
  dentition, 
  branchiostegal 
  apparatus, 
  and 
  

   paired 
  fins 
  are 
  well 
  shown. 
  Both 
  the 
  pectoral 
  and 
  pelvic 
  

   fins 
  exhibit 
  fulcra, 
  and 
  these 
  on 
  the 
  latter 
  are 
  distinctly 
  

   shown 
  to 
  be 
  biserial. 
  Each 
  pelvic 
  basipterygium 
  seems 
  to 
  

   have 
  been 
  much 
  expanded 
  proximally, 
  and 
  contracted 
  to 
  

   a 
  very 
  narrow 
  distal 
  end. 
  Purchased, 
  1864. 
  

  

  38119. 
  A 
  similar 
  specimen 
  with 
  more 
  displaced 
  squamation 
  and 
  

   with 
  few 
  teeth, 
  but 
  showing 
  the 
  anal 
  fin. 
  The 
  fulcra 
  on 
  

   the 
  pectoral 
  fins 
  are 
  relatively 
  small, 
  those 
  on 
  the 
  pelvic 
  

   fins 
  and 
  anal 
  fin 
  well 
  developed 
  and 
  biserial. 
  Some 
  scales 
  

   in 
  the 
  abdominal 
  region 
  exhibit 
  the 
  peg-and-socket 
  articu- 
  

   lation. 
  Purchased, 
  1864. 
  

  

  47043. 
  Equally 
  large 
  fish, 
  much 
  fractured, 
  showing 
  the 
  head 
  from 
  

   the 
  dorsal 
  aspect, 
  the 
  trunk 
  in 
  side 
  view, 
  and 
  wanting 
  the 
  

   caudal 
  fin. 
  Purchased, 
  1875. 
  

  

  P. 
  2027, 
  P. 
  2034. 
  Two 
  imperfect 
  specimens 
  about 
  as 
  large 
  as 
  the 
  

   last 
  ; 
  one 
  displaying 
  several 
  head-bones 
  in 
  side 
  view, 
  part 
  

   of 
  the 
  paired 
  fins 
  with 
  fulcra, 
  and 
  some 
  well-preserved 
  

   scales 
  ; 
  the 
  other 
  vertically 
  crushed, 
  much 
  fractured, 
  and 
  

   wanting 
  all 
  the 
  fins 
  except 
  the 
  caudal. 
  Egerton 
  Coll. 
  

  

  38735. 
  Another 
  imperfect 
  specimen, 
  showing 
  displaced 
  bones 
  of 
  

   head 
  and 
  wanting 
  median 
  fins. 
  Purchased, 
  1865. 
  

  

  P. 
  3633 
  a. 
  Two 
  imperfect 
  specimens, 
  the 
  first 
  showing 
  the 
  robust 
  

   hsemal 
  spines 
  at 
  the 
  end 
  of 
  the 
  caudal 
  pedicle, 
  the 
  second 
  

   exhibiting 
  the 
  jaws 
  and 
  branchiostegal 
  apparatus. 
  

  

  EnnisJtillen 
  Coll. 
  

  

  