﻿PYCNOGONIDA 
  FROM 
  JAPANESE 
  WATERS 
  — 
  HEDGPETH 
  303 
  

  

  Third 
  leg: 
  Coxae 
  siibequal, 
  about 
  as 
  broad 
  as 
  long. 
  Femur 
  and 
  

   first 
  tibia 
  subequal, 
  second 
  tibia 
  somewhat 
  shorter. 
  Tarsus 
  and 
  

   propodus 
  equal, 
  terminal 
  claw 
  two-thirds 
  as 
  long 
  as 
  propodus. 
  The 
  

   sole 
  of 
  both 
  tarsal 
  joints 
  bears 
  a 
  row 
  of 
  small,. 
  well-separated 
  spines. 
  

  

  Oviger 
  : 
  Second 
  and 
  fourth 
  segments 
  subequal, 
  third 
  about 
  a 
  third 
  

   as 
  long. 
  Terminal 
  segments 
  subequal, 
  tightly 
  coiled, 
  bearing 
  several 
  

   rows 
  of 
  rather 
  long 
  compound 
  spines. 
  The 
  compound 
  spines 
  are 
  very 
  

   finely 
  denticulate. 
  The 
  last 
  joint 
  is 
  slender 
  and 
  tapering, 
  with 
  a 
  

   terminal 
  claw 
  that 
  is 
  about 
  as 
  long 
  as 
  the 
  width 
  of 
  the 
  segment 
  itself. 
  

  

  Measurements. 
  — 
  A.s 
  follows 
  : 
  

  

  Mm. 
  

  

  Proboscis 
  14. 
  

  

  Trunk 
  8. 
  

  

  Second 
  lateral 
  process, 
  width 
  3. 
  25 
  

  

  Abdomen 
  1. 
  75 
  

  

  Palpus 
  ca. 
  19. 
  5 
  

  

  Third 
  leg: 
  Mm. 
  

  

  Coxae 
  3.5 
  

  

  Femur 
  19.0 
  

  

  First 
  tibia 
  20.0 
  

  

  Second 
  tibia 
  13.5 
  

  

  Tarsus 
  3.0 
  

  

  Propodus 
  3. 
  

  

  Terminal 
  claw 
  2.0 
  

  

  Remarks. 
  — 
  The 
  combination 
  of 
  a 
  long, 
  slender, 
  curved 
  proboscis 
  

   and 
  a 
  very 
  long 
  terminal 
  claw 
  separates 
  this 
  species 
  from 
  other 
  mem- 
  

   bers 
  of 
  the 
  genus. 
  The 
  specimen 
  appears 
  to 
  be 
  a 
  male. 
  It 
  was 
  col- 
  

   lected 
  at 
  the 
  same 
  station 
  as 
  C. 
  japonica, 
  southwest 
  of 
  Honshu. 
  

  

  Family 
  PYCNOGONIDAE 
  Wilson, 
  1878 
  

  

  Genus 
  PYCNOGONUM 
  Brunnich, 
  1764 
  

  

  PYCNOGONUM 
  TENUE 
  Slater 
  

  

  Figures 
  48, 
  & 
  ; 
  50, 
  c 
  

  

  Pycnogonum 
  littoraJe 
  var. 
  tetiue 
  Slater, 
  1879, 
  pp. 
  281-283. 
  

   Pycnogonum 
  tenue 
  Ohshima, 
  1936, 
  p. 
  867. 
  — 
  Ohshima 
  and 
  Kishida, 
  1947, 
  p. 
  1010, 
  

   fig. 
  2885. 
  

  

  Collecting 
  records. 
  — 
  Albatross 
  stations 
  3707 
  (1 
  female) 
  ; 
  3708 
  (2 
  

   females) 
  ; 
  3716 
  (1 
  female) 
  ; 
  4893 
  (1 
  male) 
  ; 
  4895 
  (1 
  male) 
  ; 
  4933 
  

   (1 
  female). 
  

  

  This 
  species 
  has 
  not 
  been 
  previously 
  figured 
  except 
  in 
  generally 
  inac- 
  

   cessible 
  Japanese 
  works 
  and 
  the 
  original 
  description 
  leaves 
  several 
  

   important 
  details 
  undiscussed. 
  Although 
  it 
  does 
  superficially 
  resem- 
  

   ble 
  P. 
  littorale 
  in 
  the 
  shape 
  of 
  its 
  proboscis, 
  the 
  dorsal 
  trmik 
  tubercles 
  

   are 
  quite 
  high, 
  sometimes 
  prolonged 
  to 
  points, 
  and 
  the 
  integument 
  is 
  

   lightly 
  reticulated 
  as 
  well 
  as 
  granulated. 
  In 
  some 
  specimens 
  the 
  reticu- 
  

   lations 
  are 
  not 
  apparent; 
  in 
  others 
  they 
  occur 
  together 
  with 
  granula- 
  

   tions. 
  The 
  oviger 
  is 
  9- 
  jointed, 
  exclusive 
  of 
  the 
  terminal 
  claw. 
  The 
  

   genital 
  pores 
  are 
  on 
  the 
  second 
  coxae. 
  In 
  the 
  female 
  they 
  are 
  dorsal 
  

   whereas 
  in 
  the 
  male 
  they 
  are 
  ventral, 
  on 
  a 
  low 
  but 
  well-developed 
  

   conical 
  tubercle. 
  I 
  could 
  find 
  them 
  only 
  on 
  the 
  last 
  pair 
  of 
  legs. 
  

  

  All 
  these 
  records 
  are 
  west 
  of 
  Kvushu. 
  

  

  