﻿Classification 
  of 
  the 
  Order 
  Iniomi. 
  121 
  

  

  Suborder 
  1. 
  Myctophoidea. 
  

  

  Caudal 
  well-developed, 
  free 
  from 
  the 
  anal 
  ; 
  pectorals 
  

   lateral; 
  pelvics 
  6-11 
  rayed, 
  below 
  or 
  behind 
  the 
  pectorals. 
  

   Mouth 
  terminal, 
  not 
  or 
  but 
  little 
  protractile. 
  Palatine 
  nor- 
  

   mally 
  developed, 
  its 
  anterior 
  end 
  attached 
  to 
  the 
  vomer, 
  with 
  

   a 
  process 
  directed 
  upwards 
  and 
  outwards 
  which 
  overlaps 
  the 
  

   proximal 
  end 
  of 
  the 
  maxillary 
  and 
  is 
  supported 
  by 
  a 
  lateral 
  

   projection 
  of 
  the 
  mesethmoid 
  ; 
  interoperculum 
  not 
  reduced. 
  

   Oleithrum 
  attached 
  to 
  supracleithrum 
  at 
  the 
  lower 
  end 
  of 
  

   the 
  latter 
  ; 
  postcleithrum, 
  when 
  present, 
  laminar, 
  attached 
  

   by 
  its 
  anterior 
  edge 
  to 
  inner 
  face 
  of 
  supracleithrum 
  or 
  

   cleithrum. 
  

  

  Family 
  1. 
  Aulopidae. 
  

  

  The 
  fishes 
  of 
  the 
  genus 
  Aulopus 
  are 
  in 
  many 
  ways 
  the 
  

   most 
  generalized 
  members 
  of 
  the 
  order; 
  the 
  form 
  is 
  moderately 
  

   elongate, 
  little 
  compressed 
  ; 
  the 
  scales 
  are 
  of 
  moderate 
  size 
  ; 
  

   the 
  eyes 
  are 
  lateral 
  and 
  the 
  slightly 
  protractile 
  terminal 
  

   mouth 
  is 
  rather 
  wide, 
  the 
  maxillary 
  extending 
  back 
  to 
  below 
  

   the 
  posterior 
  part 
  of 
  the 
  eye 
  or 
  beyond 
  ; 
  the 
  maxillary 
  is 
  

   dilated 
  posteriorly 
  and 
  bears 
  two 
  supramaxillaries 
  ; 
  the 
  small 
  

   conical 
  teeth 
  form 
  narrow 
  bands 
  in 
  the 
  jaws 
  and 
  on 
  the 
  

   palate, 
  the 
  palato-pterygoid 
  bands 
  being 
  connected 
  in 
  front 
  

   by 
  that 
  of 
  the 
  vomer. 
  The 
  branchiostegal 
  rays 
  are 
  long, 
  

   curved 
  and 
  rather 
  numerous 
  (10 
  to 
  16), 
  the 
  dorsal 
  fin 
  com- 
  

   mences 
  a 
  short 
  distance 
  behind 
  the 
  head 
  and 
  is 
  rather 
  

   elongate, 
  and 
  the 
  widely 
  separated 
  9-rayed 
  pelvic 
  fins 
  are 
  

   inserted 
  below 
  or 
  a 
  little 
  behind 
  the 
  pectorals, 
  which 
  are 
  

   placed 
  rather 
  low 
  down 
  on 
  the 
  sides. 
  There 
  is 
  no 
  air- 
  

   bladder. 
  

  

  The 
  skeleton 
  of 
  Aulopus 
  is 
  well 
  ossified 
  ; 
  the 
  skull 
  is 
  

   rather 
  elongate, 
  without 
  crests 
  on 
  the 
  flattish 
  upper 
  surface, 
  

   which 
  is 
  nearly 
  at 
  right 
  angles 
  to 
  the 
  posterior 
  surface. 
  The 
  

   parietals 
  meet 
  above 
  the 
  supraoccipital 
  and 
  with 
  the 
  pterotics 
  

   roof 
  the 
  posterior 
  temporal 
  f'ossse 
  ; 
  the 
  cranium 
  broadens 
  out 
  

   behind 
  the 
  orbits 
  and 
  the 
  sphenotic 
  has 
  a 
  prominent 
  process 
  

   directed 
  outwards 
  and 
  downwards; 
  the 
  subtemporal 
  fossa 
  is 
  

   moderately 
  deep; 
  the 
  orbitosphenoid 
  is 
  a 
  vertical 
  lamina 
  

   extending 
  from 
  the 
  frontals 
  to 
  the 
  parasphenoid 
  and 
  forming 
  

   a 
  septum 
  in 
  the 
  anterior 
  half 
  of 
  the 
  interorbital 
  region 
  ; 
  

   posteriorly 
  it 
  is 
  separated 
  from 
  the 
  alisphenoids 
  by 
  a 
  pair 
  of 
  

   inferior 
  ridges 
  of 
  the 
  frontals 
  ; 
  the 
  parasphenoid 
  widens 
  out 
  

   anteriorly 
  on 
  each 
  side 
  into 
  a 
  broad 
  lamina 
  which 
  unites 
  with 
  

   the 
  lower 
  edge 
  of 
  the 
  lateral 
  ethmoid; 
  the 
  latter 
  is 
  well 
  

   ossified, 
  but 
  is 
  separated 
  fiom 
  its 
  fellow 
  by 
  a 
  wide 
  interspace 
  ; 
  

  

  