﻿238 
  PROCEEDINGS 
  OP 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.41. 
  

  

  joint 
  is 
  considerably 
  narrower 
  than 
  the 
  basal 
  The 
  exopod 
  of 
  each 
  

   pair 
  is 
  attached 
  to 
  the 
  outer 
  margin 
  of 
  the 
  basal 
  joint, 
  the 
  endopod 
  

   to 
  the 
  posterior 
  margin. 
  The 
  basal 
  joint 
  of 
  each 
  ramus 
  carries 
  a 
  

   stout 
  spine 
  on 
  either 
  side 
  of 
  the 
  terminal 
  joint; 
  the 
  latter 
  carry 
  six 
  

   spines 
  except 
  in 
  the 
  endopods 
  of 
  the 
  third 
  and 
  fourth 
  legs, 
  where 
  

   they 
  have 
  only 
  four. 
  

  

  Color 
  a 
  lemon-3'ellow, 
  inclined 
  to 
  orange 
  on 
  the 
  doreal 
  surface, 
  llie 
  

   tips 
  of 
  the 
  maxillipeds 
  a 
  dark 
  blood-red, 
  the 
  digestive 
  tube 
  a 
  deep 
  

   blue-black. 
  Egg-strings 
  sulphur-yellow, 
  turning 
  pinlc 
  mth 
  devel- 
  

   opment. 
  

  

  Total 
  length, 
  3.1 
  mm. 
  Carapace, 
  0.8 
  mm. 
  long, 
  0.75 
  mm. 
  wide. 
  

   Second 
  thorax 
  segment, 
  1.15 
  mm. 
  mde. 
  Egg-strings, 
  3 
  to 
  5 
  mm. 
  

   long. 
  

  

  Male. 
  — 
  Body 
  narrow 
  and 
  elongated, 
  about 
  the 
  same 
  diameter 
  

   throughout 
  the 
  thorax, 
  the 
  abdomen 
  only 
  one-third 
  as 
  \vdde. 
  Cara- 
  

   pace 
  oblong, 
  one-third 
  longer 
  than 
  wide, 
  with 
  nearly 
  straight 
  anterior 
  

   and 
  posterior 
  margins. 
  First 
  thorax 
  segment 
  partially 
  separated 
  

   from 
  the 
  head; 
  second, 
  third, 
  and 
  fourth 
  segments 
  increasing 
  much 
  

   in 
  length 
  and 
  slightly 
  in 
  width. 
  Fifth 
  segment 
  one-third 
  the 
  length 
  

   of 
  the 
  fourth 
  segment; 
  genital 
  segment 
  the 
  same 
  length 
  as 
  the 
  fifth 
  

   segment 
  but 
  not 
  as 
  wide; 
  abdomen 
  two-jointed, 
  joints 
  the 
  same 
  

   length; 
  anal 
  laminae 
  narrow 
  and 
  elongate, 
  each 
  tipped 
  with 
  three 
  

   short 
  spines. 
  

  

  First 
  antennae 
  stouter 
  than 
  in 
  the 
  female, 
  the 
  basal 
  joints 
  much 
  

   larger 
  than 
  the 
  terminal; 
  second 
  pair 
  comparatively 
  small 
  and 
  

   slender, 
  the 
  terminal 
  claw 
  very 
  weak. 
  First 
  maxilla^ 
  with 
  a 
  rudi- 
  

   mentary 
  endopod 
  and 
  exopod, 
  each 
  one-jointed 
  and 
  tipped 
  with 
  

   two 
  spines; 
  second 
  pair 
  with 
  a 
  large 
  claw 
  arising 
  from 
  the 
  anterior 
  

   margin 
  at 
  the 
  tip 
  of 
  the 
  terminal 
  joint, 
  and 
  curving 
  around 
  the 
  

   end 
  so 
  as 
  to 
  point 
  backward. 
  

  

  Maxillipeds 
  modified 
  into 
  huge 
  chelae, 
  the 
  dorsal 
  jaw 
  stout 
  and 
  

   bluntly 
  rounded 
  at 
  the 
  tip, 
  the 
  ventral 
  jaw 
  a 
  slender 
  pointed 
  claw, 
  

   its 
  tip 
  curved 
  around 
  the 
  end 
  of 
  the 
  dorsal 
  jaw, 
  and 
  with 
  a 
  fringe 
  of 
  

   short 
  hairs 
  along 
  the 
  posterior 
  margin. 
  

  

  First 
  four 
  pairs 
  of 
  legs 
  biramose; 
  the 
  first 
  pair 
  very 
  rudimentary, 
  

   both 
  rami 
  one-jointed 
  and 
  tipped 
  \nth 
  two 
  short 
  spines; 
  exopods 
  

   of 
  second, 
  third, 
  and 
  fourth 
  pairs 
  attached 
  to 
  the 
  outer 
  margin 
  of 
  

   the 
  basal 
  joint 
  as 
  in 
  the 
  female; 
  exopod 
  of 
  second 
  pair 
  four 
  times 
  

   the 
  length 
  of 
  the 
  endopod 
  and 
  two-jointed, 
  the 
  terminal 
  joint 
  tipped 
  

   with 
  four 
  spines; 
  endopod 
  minute, 
  one-jointed, 
  with 
  three 
  spines; 
  

   rami 
  of 
  third 
  pair 
  about 
  the 
  same 
  length, 
  exopod 
  three-jointed 
  with 
  

   five 
  spines, 
  endopod 
  two-jointed 
  with 
  a 
  single 
  terminal 
  spine; 
  endo- 
  

   pod 
  of 
  fourth 
  pair 
  longer 
  than 
  the 
  exopod, 
  two-jointed, 
  with 
  a 
  single 
  

   terminal 
  spine 
  much 
  longer 
  than 
  the 
  ramus 
  itself; 
  exopod 
  tliree- 
  

   jointed 
  with 
  five 
  spines; 
  fifth 
  legs 
  stout, 
  but 
  one-jointed, 
  with 
  a 
  

   smgle 
  tiny 
  spine 
  near 
  the 
  tip. 
  

  

  