﻿PYCNOGONIDA 
  FROM 
  JAPANESE 
  WATERS 
  — 
  HEDGPETH 
  

  

  291 
  

  

  and 
  several 
  widely 
  spaced 
  spines 
  along 
  the 
  sole. 
  Terminal 
  claw 
  

   strongly 
  curved, 
  about 
  half 
  as 
  long 
  as 
  propodus. 
  Auxiliaries 
  about 
  a 
  

   third 
  as 
  long 
  as 
  the 
  terminal 
  claw. 
  

  

  Oviger 
  10- 
  jointed, 
  with 
  a 
  few 
  scattered 
  denticulate 
  spines 
  on 
  the 
  

   terminal 
  segments. 
  

  

  Measureinents. 
  — 
  Ks 
  follows 
  : 
  

  

  Mm. 
  

  

  Proboscis 
  1. 
  5 
  

  

  Trunk 
  1. 
  75 
  

  

  Second 
  lateral 
  process, 
  width 
  1. 
  75 
  

  

  Abdomen 
  . 
  9 
  

  

  Third 
  leg 
  : 
  Mm. 
  

  

  Coxae 
  1.4 
  

  

  Femur 
  1. 
  75 
  

  

  First 
  tibia 
  1.9 
  

  

  Second 
  tibia 
  1. 
  9 
  

  

  Tarsus 
  . 
  1 
  

  

  Propodus 
  . 
  75 
  

  

  Terminal 
  claw 
  .3 
  

  

  Remarks. 
  — 
  Heretofore 
  species 
  of 
  Ammothella 
  have 
  been 
  known 
  

   only 
  from 
  littoral 
  waters, 
  and 
  this 
  deep 
  record 
  establishes 
  a 
  new 
  bathy- 
  

   metric 
  range 
  for 
  the 
  genus. 
  Only 
  one 
  other 
  species, 
  A. 
  hi-unguiculata, 
  

   is 
  known 
  from 
  Japanese 
  waters, 
  and 
  it 
  can 
  be 
  separated 
  easily 
  from 
  

   this 
  species 
  by 
  the 
  absence 
  of 
  the 
  terminal 
  claw. 
  The 
  locality 
  is 
  off 
  

   southern 
  Honshu. 
  

  

  Genus 
  ASCORHYNCHUS 
  Sars, 
  1877 
  

  

  Of 
  the 
  six 
  species 
  of 
  this 
  genus 
  Imown 
  to 
  occur 
  in 
  Japanese 
  waters, 
  

   five 
  are 
  represented 
  in 
  the 
  collections 
  examined, 
  and 
  the 
  key 
  below 
  is 
  

   based 
  primarily 
  on 
  the 
  characters 
  of 
  these 
  specimens. 
  

  

  1. 
  Clielifore 
  2-jointed 
  ; 
  extent 
  less 
  than 
  two 
  inches 
  2 
  

  

  Chelifore 
  3- 
  jointed; 
  extent 
  two 
  to 
  three 
  inches 
  japonicus 
  (p. 
  292) 
  

  

  2. 
  Trunk, 
  or 
  lateral 
  processes 
  and 
  coxae, 
  with 
  prominent 
  dorsolateral 
  tubercles 
  

  

  or 
  projections 
  3 
  

  

  Without 
  prominent 
  tubercles 
  or 
  coxal 
  processes 
  glaberrimus 
  (p. 
  293) 
  

  

  3. 
  Tarsus 
  more 
  than 
  half 
  as 
  long 
  as 
  propodus 
  4 
  

  

  Tarsus 
  less 
  than 
  half 
  as 
  long 
  as 
  propodus 
  cryptopygius 
  (Ortmann) 
  

  

  4. 
  Abdomen 
  more 
  than 
  half 
  as 
  long 
  as 
  proboscis 
  5 
  

  

  Abdomen 
  half 
  as 
  long 
  or 
  less 
  than 
  half 
  as 
  long 
  as 
  proboscis. 
  

  

  auchenicus 
  (p. 
  291) 
  

  

  5. 
  Fingerlike 
  processes 
  on 
  second 
  coxae 
  almost 
  as 
  long 
  as 
  width 
  of 
  joint. 
  

  

  ramipes 
  (p. 
  292) 
  

   Processes 
  on 
  second 
  coxae 
  very 
  short 
  glabroides 
  (p. 
  293) 
  

  

  ASCORHYNCHUS 
  AUCHENICUS 
  (Slater) 
  

  

  Parazetes 
  aucUenicus 
  Slater, 
  1879, 
  pp. 
  281-283. 
  

   Ascorhynchus 
  mmutus 
  Hoek, 
  1881, 
  pp. 
  55-57, 
  pi. 
  6, 
  figs. 
  10-16. 
  

   Ascorhynchus 
  bicomis 
  Ortmann, 
  1891, 
  pp. 
  162-163. 
  

   Ascorhynchus 
  minutus 
  Loman, 
  1908, 
  p. 
  33. 
  

   Ascorhynchus 
  ramipes 
  (part) 
  Loman, 
  1911, 
  p. 
  6. 
  

   Ascorhynchus 
  auchenicus 
  Calman, 
  1922, 
  pp. 
  199-203, 
  figs. 
  1-4. 
  

  

  Collecting 
  record. 
  — 
  Albatross 
  station 
  3707 
  (1 
  ovigerous 
  male) 
  ; 
  3708 
  

   (1 
  female). 
  

  

  