﻿SEMIONOTID^E. 
  97 
  

  

  P. 
  5936. 
  Imperfect 
  large 
  head 
  and 
  trunk, 
  with 
  portions 
  of 
  the 
  

   dorsal 
  and 
  pelvic 
  fins. 
  The 
  tuberculated 
  cranial 
  roof 
  is 
  

   exposed, 
  and 
  the 
  ventral 
  portion 
  of 
  the 
  abdominal 
  squa- 
  

   mation 
  is 
  especially 
  well 
  displayed. 
  The 
  scales 
  are 
  not 
  

   serrated, 
  but 
  the 
  postero-inferior 
  angle 
  is 
  acuminate. 
  

  

  Purchased, 
  1889. 
  

  

  P. 
  6370. 
  Imperfect 
  fish 
  about 
  0*3 
  in 
  length, 
  exhibiting 
  the 
  tuber- 
  

   cular 
  ornament 
  on 
  the 
  head-bones 
  and 
  operculum. 
  

  

  Beckles 
  Coll. 
  

  

  36080-81. 
  Two 
  specimens, 
  0-24 
  and 
  0*29 
  in 
  length 
  respectively. 
  

   The 
  smaller 
  fish 
  is 
  shown 
  partly 
  from 
  the 
  lateral, 
  partly 
  

   from 
  the 
  dorsal 
  aspect, 
  and 
  displays 
  some 
  of 
  the 
  head- 
  

   bones 
  and 
  the 
  squamation 
  ; 
  a 
  few 
  of 
  the 
  principal 
  flank- 
  

   scales 
  are 
  observed 
  to 
  be 
  coarsely, 
  but 
  feebly 
  crenulated. 
  

   The 
  trunk 
  of 
  the 
  larger 
  fish 
  is 
  shown 
  chiefly 
  as 
  an 
  im- 
  

   pression, 
  though 
  the 
  greater 
  part 
  of 
  the 
  dorsal 
  fin 
  is 
  

   preserved 
  ; 
  while 
  in 
  the 
  head 
  the 
  left 
  parietal 
  and 
  frontal, 
  

   circumorbitals, 
  and 
  other 
  bones 
  are 
  exposed 
  from 
  the 
  inner 
  

   aspect. 
  Cunnington 
  Coll. 
  

  

  45903. 
  Imperfect 
  small 
  trunk, 
  with 
  remains 
  of 
  the 
  head, 
  displaying 
  

   some 
  of 
  the 
  ribs 
  and 
  the 
  stout 
  neural 
  spines. 
  

  

  Purchased, 
  1874. 
  

  

  P. 
  4220. 
  Large 
  trunk, 
  with 
  remains 
  of 
  the 
  head 
  and 
  part 
  of 
  the 
  

   dorsal 
  and 
  caudal 
  fins. 
  A 
  large 
  portion 
  of 
  the 
  squamation 
  

   is 
  well 
  preserved, 
  but 
  none 
  of 
  the 
  flank-scales 
  exhibit 
  

   denticulations. 
  The 
  dorsal 
  fin-fulcra 
  are 
  unusually 
  at- 
  

   tenuated. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  4440. 
  Imperfect 
  small 
  trunk 
  displaying 
  the 
  fulcra 
  of 
  the 
  dorsal 
  

   and 
  anal 
  fins, 
  and 
  the 
  long, 
  curved 
  ribs 
  in 
  the 
  abdominal 
  

   region. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  2006. 
  Small 
  trunk, 
  about 
  0*23 
  in 
  length, 
  with 
  portions 
  of 
  all 
  the 
  

   fins, 
  especially 
  displaying 
  the 
  fulcra. 
  All 
  the 
  principal 
  

   flank-scales 
  of 
  the 
  abdominal 
  region 
  are 
  coarsely 
  though 
  

   feebly 
  serrated 
  ; 
  and 
  this 
  specimen 
  forms 
  the 
  basis 
  of 
  the 
  

   restoration 
  of 
  the 
  trunk 
  in 
  fig. 
  22, 
  p. 
  95. 
  Egerton 
  Coll. 
  

  

  P. 
  2006 
  a. 
  Head, 
  abdominal 
  region, 
  and 
  base 
  of 
  the 
  tail 
  of 
  a 
  

   similar 
  fish, 
  lateral 
  aspect, 
  with 
  portions 
  of 
  the 
  dorsal 
  and 
  

   paired 
  fins. 
  In 
  the 
  mandible 
  the 
  posterior 
  teeth 
  seem 
  to 
  

   be 
  relatively 
  small 
  and 
  arranged 
  in 
  more 
  than 
  one 
  series 
  ; 
  

   and 
  the 
  margin 
  of 
  the 
  upper 
  jaw 
  is 
  shown 
  to 
  be 
  formed 
  by 
  

  

  PART 
  III. 
  H 
  

  

  