﻿270 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

   NYMPHON 
  PROFUNDUM 
  Hilton 
  

  

  Figure 
  33, 
  a-f 
  

  

  VOL. 
  98 
  

  

  'Symphon 
  profundum 
  Hilton, 
  1942a, 
  p. 
  3. 
  

  

  Collecting 
  record. 
  — 
  Albatross 
  station 
  4766, 
  latitude 
  52°38' 
  N., 
  longi- 
  

   tude 
  174°49' 
  W., 
  1,766 
  fathoms. 
  May 
  31, 
  1906, 
  1 
  female, 
  holotype. 
  

  

  This 
  is 
  a 
  uniunguiculate 
  species, 
  differing 
  from 
  those 
  found 
  in 
  Jap- 
  

   anese 
  waters 
  in 
  the 
  absence 
  of 
  an 
  eye 
  tubercle, 
  which 
  character 
  it 
  shares 
  

   with 
  N. 
  hamatum 
  Hoek 
  and 
  N. 
  proceruTn 
  Hoek 
  (1881, 
  see 
  also 
  Gordon, 
  

  

  Figure 
  33. 
  — 
  a-f, 
  Nymphon 
  profundum 
  Hilton; 
  g-k, 
  Nymphon 
  noctum 
  Hilton; 
  /, 
  Nymphon 
  

   duospinum 
  (Hilton); 
  m, 
  Nymphon 
  quadrispinum 
  (Hilton), 
  e-f, 
  j, 
  k, 
  greatly 
  enlarged; 
  all 
  

   others 
  to 
  same 
  scale, 
  as 
  Indicated. 
  

  

  1932). 
  In 
  general 
  appearance, 
  and 
  in 
  the 
  conformation 
  of 
  the 
  com- 
  

   pound 
  spines 
  of 
  the 
  oviger 
  it 
  resembles 
  A^. 
  hamatum 
  ( 
  Challenger 
  sta- 
  

   tions 
  146 
  and 
  147, 
  Indian 
  Ocean 
  south 
  of 
  Madagascar), 
  but 
  it 
  lacks 
  

   the 
  projection 
  on 
  the 
  ends 
  of 
  the 
  femur 
  of 
  that 
  species. 
  Except 
  for 
  

   the 
  fewer 
  denticulations 
  of 
  its 
  compound 
  spines, 
  N. 
  profundum 
  is 
  

   almost 
  identical 
  with 
  N. 
  procerum 
  {Challenger 
  station 
  299, 
  in 
  the 
  

   South 
  Pacific 
  west 
  of 
  Valparaiso). 
  However, 
  N. 
  profundmn 
  differs 
  

   from 
  both 
  of 
  Hoek's 
  species 
  in 
  the 
  structure 
  of 
  the 
  terminal 
  claw 
  

   of 
  the 
  oviger, 
  which 
  bears 
  half 
  a 
  dozen 
  long 
  slender 
  spines 
  instead 
  

  

  