﻿PYCNOGONIDA 
  FROM 
  JAPANESE 
  WATERS 
  — 
  HEDGPETH 
  273 
  

  

  glacidle 
  group, 
  this 
  species 
  cannot 
  be 
  clearly 
  separated 
  from 
  that 
  

   complex. 
  The 
  chela 
  is 
  somewhat 
  larger 
  than 
  usual, 
  and 
  the 
  record 
  

   from 
  859 
  fathoms 
  in 
  the 
  Gulf 
  of 
  California 
  is 
  puzzling. 
  As 
  a 
  diagnos- 
  

   tic 
  character, 
  Hilton 
  describes 
  the 
  auxiliary 
  claws 
  as 
  "more 
  than 
  half 
  

   the 
  length" 
  of 
  the 
  terminal. 
  I 
  find 
  them 
  slightly 
  less 
  than 
  half 
  as 
  

   long. 
  The 
  pointed 
  eye 
  tubercle 
  is 
  not 
  a 
  good 
  character, 
  as 
  it 
  is 
  also 
  

   found 
  in 
  specimens 
  of 
  N. 
  grossipes^ 
  and 
  the 
  tip 
  is 
  easily 
  broken 
  off. 
  

  

  NYMPHON 
  MICROCOLLIS 
  Hilton 
  

  

  FiGUEE 
  34, 
  d 
  

   Nymphon 
  microcollis 
  Hilton, 
  1942a, 
  p. 
  5. 
  

  

  Collecting 
  record. 
  — 
  U.S.R.S. 
  Corwin, 
  "Alaska," 
  1885, 
  1 
  female 
  (holo- 
  

   type). 
  

  

  The 
  specimen 
  described 
  under 
  this 
  name 
  does 
  not 
  appear 
  to 
  be 
  

   separable 
  from 
  Nymphon 
  hrevirostre 
  Hodge. 
  

  

  NYMPHON 
  BASISPINOSUM 
  Hilton 
  

  

  Figure 
  34, 
  e 
  

   Nymphon 
  hasispinosum 
  Hilton, 
  1942a, 
  p. 
  5. 
  

  

  Collecting 
  record. 
  — 
  Albatross 
  station 
  4788, 
  latitude 
  54°50'24"' 
  N., 
  

   longitude 
  167° 
  13' 
  E., 
  57 
  fathoms, 
  June 
  12, 
  1906, 
  1 
  ovigerous 
  male 
  

   (holotype). 
  

  

  The 
  prominent 
  conical 
  projections 
  or 
  tubercles 
  over 
  the 
  bases 
  of 
  

   the 
  chelifores 
  makes 
  this 
  a 
  well-characterized 
  species. 
  In 
  this 
  respect 
  

   it 
  somewhat 
  resembles 
  N. 
  striatum 
  Losina-Losinsky, 
  from 
  which 
  it 
  

   differs 
  principally 
  in 
  the 
  possession 
  of 
  large 
  spines 
  on 
  the 
  propodus. 
  

   The 
  designation 
  of 
  the 
  type 
  specimen 
  as 
  a 
  female 
  is 
  evidently 
  a 
  lapsiDS 
  

   calami: 
  the 
  specimen 
  is 
  an 
  ovigerous 
  male. 
  The 
  long 
  joints 
  of 
  the 
  

   oviger 
  are 
  subequal, 
  straight. 
  

  

  NYMPHON 
  ELONGATUM 
  Hilton 
  

  

  Figure 
  34, 
  f 
  

   Nymphon 
  elongatum 
  Hilton, 
  1942a, 
  p. 
  5. 
  

  

  Collecting 
  record.— 
  Albatross 
  station 
  4792, 
  latitude 
  54°36'15" 
  N., 
  

   longitude 
  166°57'15" 
  W., 
  72 
  fathoms, 
  June 
  14, 
  1906, 
  2 
  males, 
  1 
  female, 
  

   cotypes. 
  

  

  Inasmuch 
  as 
  all 
  three 
  specimens 
  have 
  rather 
  delicate 
  toothed 
  chelae, 
  

   the 
  diagnosis 
  of 
  "heavy 
  jaws, 
  no 
  teeth" 
  must 
  be 
  revised. 
  The 
  most 
  

   important 
  diagnostic 
  character 
  is 
  the 
  presence 
  of 
  two 
  large 
  spines 
  near 
  

   the 
  middle 
  of 
  the 
  propodus. 
  The 
  tarsus 
  is 
  twice 
  as 
  long 
  as 
  the 
  propo- 
  

   dus. 
  In 
  one 
  specimen 
  the 
  lateral 
  processes 
  are 
  separated 
  by 
  at 
  least 
  

   four 
  times 
  the 
  diameter, 
  but 
  the 
  others 
  are 
  less 
  widely 
  separated. 
  The 
  

   fourth 
  joint 
  of 
  the 
  male 
  oviger 
  is 
  slightly 
  curved, 
  not 
  quite 
  as 
  much 
  

   as 
  the 
  fifth, 
  which 
  is 
  straight 
  and 
  slightly 
  expanded 
  distally. 
  

  

  