﻿PYCNOGONIDA 
  FROM 
  JAPANESE 
  WATERS 
  — 
  HEDGPETH 
  271 
  

  

  of 
  the 
  wedgelike 
  serrations 
  of 
  N. 
  hamatum 
  or 
  the 
  numerpus 
  close- 
  

   set 
  spines 
  of 
  N. 
  procerum. 
  Nymphon 
  procerwrn 
  and 
  N. 
  profundwm, 
  

   are 
  based 
  on 
  single 
  female 
  specimens. 
  

  

  NYMPHON 
  NOCTUM 
  Hilton 
  

  

  Figure 
  33, 
  g-k 
  

   'Nymphon 
  noctum 
  Hilton, 
  1942a, 
  p. 
  3. 
  

  

  Collecting 
  record. 
  — 
  Albatross 
  station 
  2859, 
  latitude 
  55°20' 
  N., 
  longi- 
  

   tude 
  136°20' 
  W., 
  1,569 
  fathoms, 
  August 
  29, 
  1888, 
  1 
  ovigerous 
  male, 
  

   holotype; 
  1 
  female; 
  2 
  juveniles 
  (paratypes). 
  

  

  With 
  the 
  exception 
  of 
  a 
  longer 
  tarsal 
  joint, 
  this 
  species 
  resembles 
  

   N. 
  profimdum 
  and 
  differs 
  from 
  the 
  two 
  blind 
  species 
  described 
  by 
  Hoek 
  

   in 
  the 
  same 
  particulars 
  as 
  N. 
  profundum. 
  In 
  the 
  male 
  specimen 
  there 
  

   are 
  slight 
  projections 
  at 
  the 
  ends 
  of 
  the 
  femurs, 
  but 
  this 
  process 
  is 
  

   much 
  less 
  conspicuous 
  than 
  in 
  N. 
  tiamatwrri'. 
  Except 
  for 
  the 
  longer 
  

   tarsus 
  and 
  a 
  somewhat 
  heavier 
  investiture 
  of 
  setae, 
  it 
  is 
  inseparable 
  

   from 
  N. 
  profundwiTh^ 
  and 
  I 
  do 
  not 
  believe 
  these 
  details 
  are 
  of 
  specific 
  

   importance. 
  The 
  fourth 
  joint 
  of 
  the 
  male 
  oviger 
  is 
  broadly 
  curved, 
  

   somewhat 
  less 
  than 
  one-half 
  as 
  long 
  as 
  the 
  fifth, 
  which 
  is 
  straight 
  and 
  

   narrowly 
  clavate. 
  

  

  NYMPHON 
  MOLUM 
  Hilton 
  

  

  Figure 
  34, 
  a 
  

   'Nymphon 
  molum 
  Hilton, 
  1942a, 
  p. 
  4. 
  

  

  Collecting 
  record. 
  — 
  Alhatross 
  station 
  3439, 
  latitude 
  57°06' 
  N., 
  longi- 
  

   tude 
  170°35' 
  W., 
  41 
  fathoms, 
  August 
  3, 
  1891, 
  1 
  ovigerous 
  male, 
  holo- 
  

   type. 
  

  

  This 
  species 
  is 
  characterized 
  by 
  a 
  rather 
  stout 
  terminal 
  claw 
  and 
  

   small 
  auxiliaries, 
  the 
  lack 
  of 
  large 
  spines 
  on 
  the 
  propodus, 
  and 
  the 
  

   rather 
  simple 
  spines 
  of 
  the 
  oviger. 
  These 
  spines 
  are 
  smooth 
  or 
  bear 
  

   but 
  one 
  pair 
  of 
  denticulations. 
  The 
  chelae 
  are 
  moderately 
  long, 
  armed 
  

   with 
  short 
  teeth. 
  The 
  fourth 
  and 
  fifth 
  joints 
  of 
  the 
  oviger 
  are 
  sub- 
  

   equal, 
  straight, 
  not 
  conspicuously 
  swollen 
  distally. 
  

  

  NYMPHON 
  VARIATUM 
  Hilton 
  

  

  Figure 
  34, 
  6 
  

  

  Nymphon 
  variatum 
  Hilton, 
  1942a, 
  p. 
  4. 
  

  

  Collecting 
  record. 
  — 
  Alhatross 
  station 
  4245, 
  Kasan 
  Bay, 
  Prince 
  of 
  

   Wales 
  Island, 
  95 
  to 
  98 
  fathoms, 
  July 
  11, 
  1903, 
  1 
  female 
  ( 
  ?) 
  . 
  

  

  This 
  species 
  is 
  based 
  on 
  a 
  single 
  specimen, 
  probably 
  a 
  female, 
  which 
  

   is 
  broken 
  in 
  half 
  and 
  lacks 
  ovigers. 
  Hence 
  its 
  exact 
  status 
  cannot 
  be 
  

   ascertained, 
  but 
  it 
  appears 
  to 
  be 
  close 
  to 
  if 
  not 
  identical 
  with 
  N. 
  

   pixellae 
  Scott. 
  

  

  