﻿166 
  PROCEEDINOS 
  OF 
  THE 
  yATIONAL 
  MVHEVM. 
  vol.44. 
  

  

  to 
  eye, 
  and 
  the 
  fold 
  at 
  upper 
  angle 
  of 
  opercular 
  flap, 
  naked; 
  lateral 
  

   line 
  anteriorly 
  nearly 
  0.33 
  diameter 
  of 
  eye 
  in 
  width, 
  narrowing 
  

   posteriorly, 
  disappearing 
  at 
  about 
  0.5 
  a 
  head 
  length 
  from 
  base 
  of 
  

   caudal; 
  structurally 
  it 
  resembles 
  Lamprogrammus, 
  having 
  an 
  outer 
  

   band 
  of 
  small 
  scales, 
  pierced 
  at 
  regular 
  intervals 
  by 
  pore-like 
  struc- 
  

   tures, 
  and 
  underneath 
  a 
  single 
  row 
  of 
  enlarged, 
  plate-like 
  scales. 
  

  

  Dorsal 
  and 
  anal 
  continuous 
  with 
  the 
  caudal; 
  origin 
  of 
  dorsal 
  a 
  

   head 
  length 
  behind 
  tip 
  of 
  snout; 
  distance 
  of 
  anal 
  from 
  tip 
  of 
  snout 
  

   2,22 
  (2.28 
  in 
  total 
  length); 
  ventrals 
  short, 
  simple, 
  about 
  equal 
  to 
  

   diameter 
  of 
  eye, 
  bases 
  close 
  together 
  inserted 
  behind 
  humeral 
  sym- 
  

   physis; 
  pectoral 
  1.41 
  in 
  head, 
  long, 
  narrow, 
  its 
  tip 
  extending 
  more 
  

   than 
  halfway 
  to 
  origin 
  of 
  anal. 
  

  

  Color 
  in 
  alcohol: 
  Back 
  and 
  sides 
  raw 
  umber; 
  belly 
  straw 
  yellow, 
  

   punctulate 
  with 
  black 
  dots; 
  vertical 
  fins 
  similar 
  to 
  adjacent 
  body 
  

   color, 
  punctulate 
  with 
  black, 
  the 
  black 
  margin 
  of 
  the 
  dorsal 
  and 
  anal 
  

   widening 
  posteriorly 
  to 
  include 
  entire 
  fin; 
  pectoral 
  dusky. 
  

  

  Ty2)e. 
  — 
  Cat. 
  No. 
  74147, 
  U.S.N.M., 
  57 
  cm. 
  in 
  length, 
  taken 
  with 
  a 
  

   beam 
  trawl 
  at 
  station 
  5626 
  (lat. 
  00° 
  07' 
  30" 
  N.; 
  long. 
  127° 
  29' 
  00" 
  

   E.), 
  near 
  Kayoa 
  Island, 
  Dutch 
  East 
  Indies, 
  at 
  a 
  depth 
  of 
  265 
  fathoms, 
  

   on 
  a 
  bottom 
  of 
  gray 
  mud 
  and 
  fine 
  sand. 
  

  

  There 
  are 
  two 
  small 
  examples 
  in 
  the 
  collection 
  which 
  appear 
  to 
  be 
  

   referable 
  to 
  this 
  species, 
  one 
  22 
  cm. 
  long 
  from 
  station 
  5372 
  (150 
  

   fathoms) 
  near 
  Marinduque 
  Island, 
  west 
  coast 
  of 
  Luzon, 
  the 
  second 
  

   18.9 
  cm. 
  long, 
  from 
  station 
  5523, 
  between 
  Negros 
  and 
  Alindanao. 
  

  

  The 
  form 
  and 
  structure 
  of 
  this 
  fish 
  indicate 
  that 
  it 
  is 
  a 
  very 
  active 
  

   species, 
  not 
  confining 
  itself 
  to 
  the 
  bottom 
  regions. 
  The 
  body 
  is 
  

   firm 
  and 
  the 
  pectorals 
  are 
  large 
  and 
  powerful. 
  The 
  exposed 
  ventral 
  

   wall 
  of 
  the 
  air 
  bladder 
  is 
  thick 
  and 
  muscular, 
  attached 
  at 
  the 
  sides 
  

   to 
  the 
  roughened 
  ends 
  of 
  the 
  parapophyses; 
  inside 
  the 
  bony 
  case 
  the 
  

   wall 
  is 
  thin. 
  Each 
  of 
  the 
  hollow 
  parapophyses 
  was 
  filled 
  with 
  a 
  

   dark 
  reddish 
  mass 
  undoubtedly 
  rich 
  m 
  capillaries. 
  It 
  seems 
  highly 
  

   probable 
  that 
  this 
  remarkable 
  structure 
  was 
  of 
  use 
  to 
  the 
  fish 
  in 
  

   accommodating 
  itself 
  to 
  rapidly 
  changing 
  conditions 
  of 
  pressure. 
  

  

  Genus 
  DIPLACANTHOPOMA 
  Gunther. 
  

  

  In 
  his 
  description 
  of 
  the 
  genus 
  Gunther 
  ^ 
  says 
  : 
  ' 
  ' 
  Gills 
  four, 
  with 
  

   lanceolate, 
  Mddely-set 
  gill-rakers 
  and 
  well-developed 
  laminae. 
  Pseu- 
  

   dobranchiae 
  none." 
  The 
  Philippine 
  species 
  has 
  small 
  gill-filaments, 
  

   only 
  3 
  developed 
  gill-rakers 
  on 
  the 
  first 
  arch, 
  the 
  remaining 
  gill- 
  

   rakers 
  reduced 
  to 
  small 
  knob-like 
  protuberances; 
  pseudobrancliiae 
  

   present, 
  consisting 
  of 
  2 
  small 
  filaments; 
  armature 
  of 
  operculum 
  not 
  

   unlike 
  that 
  of 
  many 
  other 
  brotulids, 
  the 
  lower 
  plate-like 
  spine 
  being 
  

   a 
  little 
  more 
  in 
  evidence 
  because 
  of 
  the 
  absence 
  of 
  a 
  covering 
  of 
  

   scales, 
  but 
  not 
  a 
  true 
  spine 
  as 
  shown 
  in 
  the 
  'illustration 
  of 
  the 
  type 
  

  

  1 
  Deep-Sea 
  Fishes, 
  Challenger 
  Report, 
  1887, 
  p. 
  115. 
  

  

  