﻿PYCNOGONIDA 
  FROM 
  JAPANESE 
  WATERS 
  — 
  HEDGPETH 
  251 
  

  

  Figure 
  21. 
  — 
  a-c, 
  Nymphon 
  braschnikozvi 
  Schimkewitsch: 
  a, 
  Tarsus 
  and 
  propodus; 
  b, 
  chela 
  

   and 
  palpus; 
  c, 
  palpus, 
  d-g, 
  N. 
  hodgsoni, 
  Schimkewitsch: 
  d. 
  Tarsus 
  and 
  propodus; 
  e, 
  

   palpus; 
  /, 
  g, 
  chelae. 
  

  

  NYMPHON 
  ELONGATUM 
  Hilton 
  

  

  Figure 
  22 
  ; 
  Figure 
  34, 
  / 
  

   'Nymphon 
  elongatum 
  Hilton, 
  1942a, 
  p. 
  5. 
  

  

  Collecting 
  records. 
  — 
  Albatross 
  stations 
  4822 
  (1 
  ovigerous 
  male) 
  ; 
  

   5023 
  (1 
  ovigerous 
  male, 
  1 
  female) 
  . 
  

  

  The 
  combination 
  of 
  a 
  long 
  propodus 
  and 
  a 
  small 
  chela 
  is 
  rare 
  in 
  

   the 
  genus, 
  and 
  constitutes 
  one 
  of 
  the 
  principal 
  characters 
  for 
  identi- 
  

   fication 
  of 
  this 
  species. 
  In 
  the 
  type 
  specimen 
  I 
  found 
  two 
  large 
  spines 
  

   on 
  the 
  sole 
  of 
  the 
  propodus, 
  as 
  in 
  one 
  of 
  the 
  other 
  specimens, 
  but 
  in 
  

   some 
  of 
  the 
  material 
  these 
  are 
  inconspicuous 
  or 
  lacking 
  and 
  on 
  other 
  

   legs 
  of 
  the 
  same 
  specimens 
  there 
  may 
  be 
  several. 
  The 
  proportions 
  of 
  

   the 
  palpal 
  segments, 
  conformation 
  of 
  the 
  chela, 
  and 
  shape 
  of 
  the 
  

   denticulate 
  spines 
  are 
  relatively 
  constant, 
  however. 
  The 
  formulae 
  

   for 
  the 
  spines 
  on 
  the 
  terminal 
  segments 
  of 
  the 
  ovigers 
  is 
  usually 
  

   15: 
  15: 
  15: 
  12:: 
  20. 
  

  

  Figure 
  22. 
  — 
  Nymphon 
  elongatum 
  Hilton: 
  a, 
  Tarsus 
  and 
  propodus; 
  b, 
  palpus; 
  c, 
  chela; 
  d. 
  

   fourth 
  and 
  fifth 
  joints 
  of 
  oviger; 
  e, 
  spine 
  of 
  oviger; 
  /, 
  spine 
  from 
  oviger 
  of 
  holotype. 
  

  

  