﻿246 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  9s 
  

  

  KEY 
  TO 
  SPECIES 
  OF 
  NYMPHON 
  FROM 
  THE 
  NORTH 
  PACIFIC— 
  Continued 
  

  

  A. 
  SPECIES 
  WITH 
  AUXILIARY 
  CLAWS 
  

  

  2. 
  Tarsus 
  as 
  long 
  as 
  or 
  longer 
  than 
  propodus, 
  or 
  more 
  than 
  two-thirds 
  as 
  long 
  3 
  

  

  Tarsus 
  conspicuously 
  shorter, 
  usually 
  about 
  two-thirds 
  as 
  long 
  as, 
  or 
  less 
  

  

  than, 
  propodus 
  14 
  

  

  3. 
  With 
  prominent 
  or 
  well-defined 
  processes 
  over 
  bases 
  of 
  chelifores 
  4 
  

  

  Without 
  tubercles 
  or 
  processes 
  over 
  base 
  of 
  chelifores, 
  but 
  bases 
  often 
  

  

  roundly 
  swollen 
  5 
  

  

  4. 
  Tubercles 
  large, 
  rounded 
  at 
  apices; 
  spines 
  on 
  propodus 
  not 
  conspicuously 
  

  

  large 
  striatum 
  

  

  Tubercles 
  small, 
  bluntly 
  pointed; 
  spines 
  on 
  propodus 
  as 
  long 
  as 
  diameter 
  

   of 
  joint 
  basispinosum 
  (p. 
  273) 
  

  

  5. 
  With 
  large 
  spines 
  on 
  sole 
  of 
  propodus 
  6 
  

  

  Without 
  large 
  spines, 
  or 
  spines 
  not 
  more 
  than 
  half 
  as 
  long 
  as 
  diameter 
  of 
  

  

  propodus 
  9 
  

  

  6. 
  Tarsus 
  and 
  propodus 
  subequal, 
  or 
  tarsus 
  slightly 
  longer, 
  but 
  not 
  twice 
  as 
  

  

  along 
  as 
  propodus 
  7 
  

  

  Tarsus 
  twice 
  as 
  long 
  as 
  propodus, 
  large 
  spines 
  on 
  sole 
  usually 
  two, 
  well 
  

   spaced 
  near 
  middle 
  of 
  joint 
  elongatum 
  (p. 
  251) 
  

  

  7. 
  Large 
  spines 
  more 
  than 
  two, 
  not 
  restricted 
  to 
  middle 
  of 
  joint, 
  or, 
  if 
  two, 
  

  

  confined 
  to 
  heel 
  8 
  

  

  With 
  two 
  large 
  spines 
  near 
  middle 
  of 
  propodus 
  gtmteri 
  (p. 
  257) 
  

  

  8. 
  Two 
  (sometimes 
  three) 
  large 
  spines 
  on 
  heel 
  of 
  propodus-heterospinura 
  (p. 
  259) 
  

   Several 
  spines 
  on 
  sole 
  of 
  propodus, 
  not 
  restricted 
  to 
  heel 
  grossipes 
  (p. 
  247) 
  

  

  9. 
  Tarsus 
  conspicuously 
  longer 
  (one-and-a-haLf 
  or 
  twice 
  as 
  long) 
  than 
  pro- 
  

  

  podus 
  10 
  

  

  Tarsus 
  usually 
  equal 
  to 
  propodus, 
  or 
  not 
  conspicuously 
  longer 
  11 
  

  

  10. 
  Auxiliary 
  claws 
  about 
  half 
  as 
  long 
  as 
  terminal 
  claw 
  pixellae 
  

  

  Auxiliary 
  claws 
  a 
  third 
  as 
  long, 
  or 
  less, 
  than 
  terminal 
  claw, 
  longitarse 
  (p. 
  247) 
  

  

  11. 
  Fourth 
  joint 
  of 
  palpus 
  as 
  long 
  as 
  or 
  not 
  conspicuously 
  shorter 
  than 
  fifth 
  12 
  

  

  Fourth 
  joint 
  of 
  palpus 
  half 
  as 
  long 
  as 
  fifth 
  hodgsoni 
  (p. 
  250) 
  

  

  12. 
  Auxiliary 
  claws 
  about 
  half 
  as 
  long 
  as 
  terminal 
  claw 
  13 
  

  

  Auxiliary 
  claws 
  less 
  than 
  half 
  as 
  long 
  as 
  terminal 
  claw 
  molura 
  (p. 
  271) 
  

  

  13. 
  Chelae 
  small, 
  fingers 
  rather 
  short, 
  wedge 
  shaped, 
  with 
  fine 
  teeth, 
  micronyx 
  

   Chelae 
  large, 
  fingers 
  long, 
  slender, 
  with 
  numerous 
  large 
  teeth. 
  

  

  japonicum 
  (p. 
  249) 
  

  

  14. 
  Origin 
  of 
  oviger 
  well 
  back 
  on 
  neck, 
  immediately 
  anterior 
  to 
  first 
  lateral 
  

  

  processes 
  15 
  

  

  Origin 
  of 
  oviger 
  out 
  on 
  neck 
  just 
  behind 
  base 
  of 
  chelifores. 
  

  

  micropedes 
  (p. 
  254) 
  

  

  15. 
  With 
  large 
  spines 
  on 
  sole 
  of 
  propodus 
  16 
  

  

  Without 
  large 
  spines 
  on 
  sole 
  of 
  propodus 
  20 
  

  

  16. 
  Without 
  stiff 
  bristlelike 
  setae 
  on 
  scape 
  and 
  trunk 
  17 
  

  

  With 
  stiff 
  bristle 
  or 
  thornlike 
  setae 
  on 
  scape, 
  trunk, 
  and 
  long 
  segments 
  of 
  

  

  legs 
  18 
  

  

  17. 
  Spines 
  as 
  long 
  as 
  thickness 
  of 
  propodus 
  or 
  shorter, 
  but 
  not 
  conspicuously 
  

  

  longer; 
  fingers 
  of 
  chelae 
  wedge 
  shaped, 
  with 
  close-set 
  teeth 
  19 
  

  

  Spines 
  of 
  propodus 
  longer 
  than 
  thickness 
  of 
  joint; 
  fingers 
  of 
  chelae 
  slender, 
  

   with 
  well-spaced 
  teeth 
  dissimilis 
  (p. 
  262) 
  

  

  18. 
  Lateral 
  processes 
  well 
  separated 
  by 
  about 
  half 
  their 
  diameter. 
  

  

  microsetosum. 
  (p. 
  274) 
  

   Lateral 
  processes 
  contiguous, 
  or 
  almost 
  so 
  duospinum 
  (p. 
  274) 
  

  

  19. 
  Tarsus 
  about 
  twice 
  as 
  long 
  as 
  thick 
  brevirostre 
  (p. 
  248) 
  

  

  Tarsus 
  usually 
  more 
  than 
  twice 
  as 
  long 
  as 
  thick 
  grossipes 
  (p. 
  247) 
  

  

  