﻿226 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol. 
  44. 
  

  

  one. 
  Egg-tubes 
  three-fourths 
  as 
  wide 
  as 
  the 
  abdomen, 
  and 
  about 
  

   lialf 
  the 
  length 
  of 
  the 
  body. 
  

  

  Joints 
  of 
  the 
  first 
  antennae 
  equal 
  in 
  length, 
  the 
  terminal 
  one 
  very 
  

   slender 
  with 
  a 
  few 
  short 
  spines 
  at 
  the 
  tip. 
  

  

  Second 
  antennae 
  large 
  and 
  stout, 
  the 
  basal 
  joint 
  reenforced 
  by 
  a 
  

   stout 
  and 
  blunt 
  spine 
  just 
  behind 
  its 
  insertion. 
  Maxillary 
  hook 
  large 
  

   and 
  stout 
  and 
  strongly 
  curved, 
  with 
  two 
  blunt 
  spines 
  between 
  its 
  

   base 
  and 
  that 
  of 
  the 
  maxilla; 
  the 
  latter 
  is 
  triangular 
  with 
  a 
  longhand 
  

   slender 
  point 
  without 
  accessory 
  teeth 
  or 
  spines. 
  Maxillipeds 
  com- 
  

   paratively 
  weak, 
  the 
  terminal 
  claw 
  actually 
  smaller 
  than 
  that 
  of 
  tlie 
  

   second 
  antennae. 
  Furca 
  made 
  up 
  of 
  two 
  short, 
  wide, 
  and 
  squarely 
  

   truncated 
  rami, 
  strongly 
  divergent 
  and 
  each 
  shaped 
  like 
  an 
  hour- 
  

   glass. 
  

  

  Basal 
  joint 
  of 
  first 
  swimming 
  legs 
  with 
  a 
  small 
  spine 
  on 
  the 
  pos- 
  

   terior 
  margin 
  near 
  the 
  proximal 
  end, 
  and 
  a 
  very 
  long 
  and 
  slender 
  

   one 
  at 
  the 
  anterior 
  distal 
  corner. 
  There 
  is 
  also, 
  attached 
  to 
  the 
  pos- 
  

   terior 
  margin 
  near 
  the 
  distal 
  end, 
  a 
  rudimentary 
  endopod, 
  which 
  is 
  

   one-jointed 
  but 
  divided 
  at 
  the 
  tip. 
  The 
  terminal 
  joint 
  of 
  the 
  exopod 
  

   has 
  three 
  spines 
  at 
  its 
  tip, 
  but 
  no 
  plumose 
  setae 
  on 
  the 
  posterior 
  

   margin. 
  

  

  The 
  spines 
  on 
  the 
  exopods 
  of 
  the 
  second 
  and 
  third 
  legs 
  are 
  ex- 
  

   ceptionally 
  large 
  and 
  stout, 
  that 
  on 
  the 
  third 
  legs 
  being 
  bent 
  into 
  a 
  

   half 
  circle. 
  Furthermore, 
  both 
  rami 
  of 
  these 
  third 
  legs 
  are 
  dis- 
  

   tinctly 
  three-jointed, 
  the 
  division 
  of 
  the 
  joints 
  being 
  similar 
  to 
  that 
  

   on 
  the 
  second 
  legs 
  and 
  totally 
  different 
  from 
  what 
  is 
  found 
  in 
  the 
  

   Caliginae. 
  The 
  basal 
  joint 
  of 
  the 
  fourth 
  legs 
  is 
  unarmed 
  and 
  is 
  about 
  

   as 
  long 
  as 
  the 
  three 
  terminal 
  joints; 
  the 
  spines 
  at 
  the 
  tips 
  of 
  the 
  

   second 
  and 
  third 
  joints 
  and 
  the 
  three 
  at 
  the 
  tip 
  of 
  the 
  terminal 
  

   joint 
  are 
  all 
  about 
  equal 
  in 
  size; 
  the 
  second 
  and 
  third 
  of 
  these 
  

   spines 
  are 
  reenforced 
  at 
  the 
  base 
  by 
  a 
  membrane 
  with 
  a 
  toothed 
  

   margin. 
  The 
  fifth 
  legs 
  appear 
  on 
  the 
  posterior 
  lobes 
  of 
  the 
  genital 
  

   segment, 
  outside 
  of 
  the 
  egg-tubes 
  and 
  close 
  to 
  the 
  lateral 
  margin. 
  

   Each 
  is 
  distinctly 
  two-jointed, 
  and 
  the 
  terminal 
  joint 
  is 
  tipped 
  with 
  

   three 
  setae. 
  

  

  The 
  cement 
  glands 
  are 
  club-shaped, 
  the 
  enlarged 
  glandular 
  portion 
  

   tapering 
  imperceptibly 
  into 
  the 
  narrow 
  duct. 
  On 
  each 
  of 
  the 
  four 
  

   females 
  obtained 
  there 
  was 
  also 
  a 
  pair 
  of 
  relatively 
  large 
  spermato- 
  

   phores 
  fastened 
  to 
  the 
  lateral 
  margins 
  of 
  the 
  abdomen. 
  Each 
  sperma- 
  

   tophore 
  is 
  spherical, 
  two-thirds 
  as 
  wide 
  as 
  the 
  abdomen, 
  and 
  fur- 
  

   nished 
  with 
  a 
  very 
  short 
  duct 
  wliich 
  leads 
  directly 
  inward 
  from 
  the 
  

   margin 
  to 
  the 
  opening 
  of 
  the 
  sperm 
  receptacle 
  on 
  the 
  midline. 
  These 
  

   ducts 
  do 
  not 
  cross, 
  but 
  each 
  empties 
  into 
  its 
  own 
  side 
  of 
  the 
  recep- 
  

   tacle. 
  

  

  Color 
  a 
  uniform 
  grayish-white 
  without 
  pigment 
  of 
  any 
  sort. 
  

  

  