﻿280 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.98 
  

  

  Remarks. 
  — 
  This 
  species 
  bears 
  a 
  superficial 
  resemblance 
  to 
  P. 
  tyde- 
  

   mani 
  in 
  its 
  general 
  appearance 
  and 
  the 
  conformation 
  of 
  the 
  proboscis, 
  

   but 
  it 
  has 
  a 
  well-developed 
  eye 
  tubercle 
  with 
  functional 
  eyes, 
  and 
  the 
  

   propodus 
  is 
  much 
  shorter, 
  with 
  heavier 
  spines 
  on 
  the 
  sole 
  than 
  P. 
  

   tydemani. 
  Hilton's 
  (1942c) 
  Pallenopsis 
  proftmda 
  from 
  the 
  Bering 
  

   Sea 
  has 
  a 
  similar 
  proboscis, 
  but 
  the 
  structure 
  of 
  the 
  propodus 
  is 
  differ- 
  

   ent 
  and 
  it 
  is 
  much 
  larger 
  in 
  proportion 
  to 
  the 
  size 
  of 
  the 
  animal 
  (fig. 
  3G, 
  

   k). 
  This 
  species 
  appears 
  to 
  be 
  a 
  deep-water 
  form 
  of 
  the 
  subtropical 
  

   latitudes, 
  as 
  both 
  Japanese 
  records 
  are 
  off 
  southern 
  Honshu. 
  

  

  Genus 
  DECACHELA 
  Hilton, 
  1939 
  

   DECACHELA 
  DISCATA 
  Hilton 
  

  

  Figure 
  37 
  

   Decachela 
  discata 
  Hilton, 
  1939a, 
  p. 
  34; 
  1942e, 
  p. 
  70. 
  

  

  Collecting 
  record.— 
  Albatross 
  station 
  4987, 
  latitude 
  43°19'20" 
  N., 
  

   longitude 
  140° 
  17' 
  E., 
  59 
  fathoms, 
  August 
  20, 
  1906, 
  44.8° 
  F., 
  1 
  female. 
  

  

  This 
  specimen 
  shows 
  no 
  significant 
  differences 
  from 
  the 
  holotype 
  

   specimen, 
  from 
  which 
  the 
  accompanying 
  figures 
  were 
  drawn. 
  As 
  can 
  

   be 
  seen 
  from 
  these 
  figures, 
  the 
  chelate 
  structure 
  on 
  which 
  Hilton 
  based 
  

   the 
  family 
  Decachelidae 
  is 
  actually 
  a 
  modified 
  basal 
  spine 
  of 
  the 
  

   propodus 
  and 
  the 
  legs 
  are 
  eight-jointed 
  instead 
  of 
  "apparently 
  seven 
  

   jointed." 
  Apparently 
  this 
  small 
  form 
  has 
  been 
  overlooked, 
  for 
  its 
  

   occurrence 
  in 
  both 
  Japan 
  and 
  California 
  suggests 
  a 
  wide 
  distribution 
  

   along 
  the 
  shores 
  of 
  the 
  North 
  Pacific. 
  This 
  record 
  is 
  off 
  the 
  west 
  coast 
  

   of 
  Hokkaido. 
  

  

  Family 
  PHOXICHILIDnDAE 
  Sars, 
  1891 
  

  

  Although 
  this 
  family 
  is 
  not 
  well 
  represented 
  in 
  Japanese 
  waters, 
  

   there 
  are 
  a 
  number 
  of 
  interesting 
  forms 
  which 
  cause 
  more 
  confusion 
  

   than 
  light 
  shed 
  on 
  the 
  status 
  of 
  the 
  genera 
  involved. 
  The 
  differences 
  

   between 
  Phoxichilidiwni 
  and 
  Anoplodactylus 
  are 
  tenuous 
  enough, 
  and 
  

   the 
  occurrence 
  of 
  two 
  species 
  that 
  would 
  probably 
  be 
  referred 
  to 
  

   Anoplodactylus 
  by 
  some 
  taxonomists, 
  but 
  which 
  possess 
  well-developed 
  

   auxiliary 
  claws 
  and 
  incompletely 
  segmented 
  ovigers, 
  characters 
  asso- 
  

   ciated 
  with 
  Phoxichilidimn, 
  opens 
  questions 
  concerning 
  the 
  validity 
  of 
  

   Anoplodactylus 
  as 
  an 
  independent 
  genus. 
  A 
  critical 
  examination 
  of 
  

   this 
  problem 
  must 
  await 
  more 
  material, 
  however. 
  

  

  Genus 
  PHOXICHILIDIUM 
  Milne-Edwards, 
  1840 
  

  

  This 
  genus 
  is 
  represented 
  in 
  Japanese 
  waters 
  by 
  two 
  hitherto 
  unde- 
  

   scribed 
  species; 
  the 
  ubiquitous 
  PhoxwhiUdivmi 
  femoratxmi 
  of 
  the 
  

   Ts^orth 
  Atlantic 
  and 
  Northeastern 
  Pacific 
  is 
  so 
  far 
  unreported 
  from 
  this 
  

  

  