﻿274 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  os 
  

  

  NYMPHON 
  NIGROGNATHUM 
  Hilton 
  

   FiGUEE 
  34, 
  g 
  

  

  Nymphon 
  nigrognathum 
  Hilton, 
  1942a, 
  p. 
  6. 
  

  

  Collecting 
  record. 
  — 
  Albatross 
  station 
  2864, 
  latitude 
  48°22' 
  N., 
  

   longitude 
  122°51' 
  W., 
  48 
  fathoms, 
  September 
  6, 
  1888, 
  1 
  ovigerous 
  male, 
  

   holotype. 
  

  

  This 
  species 
  cannot 
  be 
  clearly 
  separated 
  from 
  the 
  grossipes-mdxtimir 
  

   glaciale 
  complex. 
  Hence 
  I 
  regard 
  it 
  as 
  a 
  sjnionym 
  of 
  N. 
  grossipes. 
  

  

  NYMPHON 
  MICROSETOSUM 
  Hilton 
  

  

  Figure 
  34, 
  h 
  

  

  Nymphon 
  microsetosum 
  Hilton, 
  1942a, 
  p. 
  6. 
  

  

  Collecting 
  record. 
  — 
  Albatross 
  station 
  4777, 
  latitude 
  52°11' 
  N., 
  

   longitude 
  179°49' 
  E., 
  43-52 
  fathoms, 
  June 
  4, 
  1906, 
  2 
  specimens, 
  

   cotypes. 
  

  

  The 
  presence 
  of 
  short 
  stiff 
  setae 
  over 
  the 
  trunk, 
  scape, 
  and 
  proximal 
  

   joints 
  of 
  the 
  legs 
  characterizes 
  this 
  species. 
  The 
  combination 
  of 
  rather 
  

   large 
  size 
  and 
  very 
  short 
  tarsus 
  is 
  not 
  common 
  in 
  this 
  genus. 
  The 
  

   fourth 
  and 
  fifth 
  joints 
  of 
  the 
  oviger 
  are 
  straight, 
  subequal. 
  

  

  NYMPHON 
  DUOSPINUM 
  (Hilton) 
  

  

  Figure 
  33, 
  I 
  

  

  Chaetonymphon 
  duospinum 
  Hilton, 
  1942a, 
  p. 
  6. 
  

  

  Collecting 
  record. 
  — 
  ^Kiska 
  Harbor, 
  Alaska, 
  10 
  fathoms, 
  1873, 
  W. 
  H. 
  

   Dall 
  collector, 
  1 
  female 
  ?, 
  holotype. 
  

  

  According 
  to 
  the 
  diagnosis 
  this 
  species 
  has 
  but 
  two 
  basal 
  spines 
  on 
  

   the 
  propodus. 
  This 
  is 
  not 
  so. 
  As 
  can 
  be 
  seen 
  from 
  the 
  figure 
  there 
  

   are 
  at 
  least 
  four, 
  as 
  in 
  the 
  following 
  species. 
  Except 
  for 
  the 
  compact 
  

   trunk 
  this 
  species 
  is 
  closely 
  related 
  to 
  N. 
  microsetoswn 
  Hilton. 
  

  

  NYMPHON 
  QUADRISPINUM 
  (Hilton) 
  

  

  Figure 
  33, 
  m 
  

  

  Chaetonymphon 
  quadrispinum 
  Hilton, 
  1942a, 
  p. 
  7. 
  

  

  Collecting 
  record. 
  — 
  Kiska 
  Harbor, 
  Alaska, 
  19 
  fathoms, 
  1873, 
  W. 
  H. 
  

   Dall 
  collector, 
  1 
  female 
  ?, 
  holotype. 
  

  

  There 
  is 
  no 
  substantial 
  difference 
  between 
  the 
  two 
  specimens 
  desig- 
  

   nated 
  as 
  types 
  for 
  Chaetonymphon 
  duospinwm 
  and 
  quadrispinum., 
  

   except 
  that 
  the 
  latter 
  specimen 
  is 
  somewhat 
  larger 
  and 
  more 
  intact. 
  

  

  