﻿224 
  PR0CEEDIN08 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol. 
  44. 
  

  

  wide, 
  narrowed 
  to 
  a 
  neck 
  anteriorly 
  where 
  it 
  joins 
  the 
  fourth 
  segment, 
  

   with 
  the 
  posterior 
  margin 
  slightly 
  convex, 
  without 
  lobes 
  but 
  bearing 
  

   the 
  rudiments 
  of 
  both 
  the 
  fifth 
  and 
  sixth 
  legs 
  at 
  the 
  rounded 
  posterior 
  

   corners. 
  

  

  Abdomen 
  fused 
  into 
  the 
  center 
  of 
  the 
  posterior 
  margin 
  of 
  the 
  

   genital 
  segment, 
  with 
  only 
  the 
  extreme 
  tip 
  visible 
  on 
  either 
  side 
  of 
  

   the 
  anus; 
  anal 
  lamia£e 
  apparently 
  attached 
  to 
  the 
  genital 
  segment, 
  

   on 
  a 
  level 
  with 
  its 
  dorsal 
  surface 
  ; 
  each 
  is 
  large, 
  triangular, 
  and 
  armed 
  

   with 
  five 
  plumose 
  setas. 
  Egg-cases 
  attached 
  on 
  either 
  side 
  of 
  the 
  

   fused 
  abdomen; 
  eggs 
  large 
  and 
  thick, 
  arranged 
  as 
  in 
  Caligus. 
  

  

  Joints 
  of 
  the 
  first 
  antennae 
  equal 
  in 
  length, 
  but 
  the 
  basal 
  one 
  four 
  

   times 
  as 
  wide 
  as 
  the 
  terminal. 
  Second 
  antennae 
  slender, 
  a 
  small 
  

   spine 
  on 
  the 
  posterior 
  margui 
  of 
  the 
  basal 
  joint 
  and 
  an 
  accessory- 
  

   claw 
  on 
  the 
  ventral 
  surface 
  of 
  the 
  terminal 
  claw 
  near 
  its 
  base. 
  Maxil- 
  

   laiy 
  hooks 
  wholly 
  lacking. 
  First 
  maxilla3 
  reduced 
  to 
  mere 
  semi- 
  

   circular 
  stubs 
  on 
  either 
  side 
  of 
  the 
  mouth 
  tube; 
  second 
  maxillaB 
  like 
  

   those 
  of 
  Caligus. 
  Maxillipeds 
  very 
  large, 
  the 
  basal 
  joint 
  much 
  

   swollen, 
  the 
  terminal 
  claw 
  as 
  long 
  as 
  the 
  basal 
  joint 
  and 
  bent 
  into 
  a 
  

   sickle 
  shape, 
  with 
  a 
  small, 
  blunt 
  spine 
  on 
  the 
  inner 
  margin 
  near 
  the 
  

   base. 
  Mouth 
  tube 
  long 
  and 
  slender, 
  not 
  at 
  all 
  like 
  those 
  of 
  the 
  Cali- 
  

   ginse, 
  but 
  closely 
  resembling 
  those 
  of 
  the 
  Pandarinae. 
  Swimming 
  legs 
  

   like 
  those 
  of 
  the 
  Caliginae; 
  first 
  pair 
  with 
  three 
  terminal 
  claws, 
  three 
  

   plumose 
  setae 
  on 
  the 
  posterior 
  margin 
  of 
  the 
  terminal 
  joint, 
  and 
  a 
  

   rudimentary 
  endopod 
  on 
  the 
  basal 
  joint. 
  

  

  Spines 
  on 
  the 
  exopods 
  of 
  the 
  second 
  legs 
  very 
  long 
  and 
  turned 
  

   diagonally 
  inward 
  across 
  the 
  succeeding 
  joints. 
  Fourth 
  legs 
  very 
  

   slender, 
  the 
  basal 
  joint 
  no 
  thicker 
  than 
  the 
  terminal 
  ones. 
  

  

  Color 
  (preserved 
  material), 
  a 
  light 
  gray, 
  the 
  genital 
  segment 
  con- 
  

   siderably 
  darker 
  than 
  the 
  carapace. 
  

  

  Total 
  length, 
  1.2 
  mm. 
  Carapace, 
  0.76 
  mm. 
  long, 
  0.71 
  mm. 
  wide. 
  

   Genital 
  segment, 
  0.35 
  mm. 
  long 
  and 
  wide. 
  

  

  (parvulus, 
  very 
  small.) 
  

  

  This 
  single 
  specimen 
  is 
  placed 
  in 
  the 
  genus 
  Anurefes, 
  but 
  differs 
  

   in 
  some 
  important 
  particulars 
  from 
  the 
  two 
  species 
  already 
  described. 
  

   The 
  maxillary 
  hooks 
  are 
  not 
  present; 
  the 
  first 
  maxillae 
  and 
  furca 
  are 
  

   reduced 
  to 
  mere 
  stubs, 
  hardly 
  distinguishable; 
  the 
  abdomen 
  is 
  

   plainly 
  fused 
  into 
  the 
  center 
  of 
  the 
  posterior 
  margin 
  of 
  the 
  genital 
  

   segment, 
  and 
  the 
  anal 
  laminae 
  are 
  on 
  a 
  level 
  with 
  the 
  dorsal 
  surface 
  

   of 
  the 
  genital 
  segment 
  instead 
  of 
  being 
  attached 
  to 
  its 
  ventral 
  surface. 
  

  

  In 
  all 
  other 
  particulars 
  it 
  corresponds 
  with 
  the 
  species 
  described 
  

   by 
  Kr0yer 
  and 
  Bassett-Smith. 
  There 
  can 
  be 
  no 
  question 
  that 
  the 
  

   present 
  specimen 
  is 
  generically 
  distinct 
  from 
  Caligus 
  and 
  LepeopTi- 
  

   theirus, 
  and 
  if, 
  in 
  spite 
  of 
  the 
  above 
  differences, 
  it 
  can 
  be 
  referred 
  to 
  

   the 
  genus 
  Anuretes, 
  it 
  will 
  establish 
  the 
  validity 
  of 
  that 
  genus 
  

   satisfactorily. 
  

  

  