﻿Copppoda 
  from 
  the 
  Falhhind 
  Islands. 
  371 
  

  

  G. 
  S. 
  Brady, 
  but 
  differs 
  in 
  the 
  structure 
  of 
  the 
  second 
  

   maxillipeds 
  and 
  in 
  some 
  other 
  anatomical 
  details. 
  

  

  Fam. 
  Tisbeidae. 
  

  

  Genus 
  Tisbe, 
  Liiljel^org. 
  

  

  Tishe 
  varians, 
  sp. 
  n. 
  (PI. 
  XIV. 
  figs. 
  6-12.) 
  

  

  Female. 
  — 
  Antennules 
  moderately 
  elongated 
  and 
  composed 
  

   of 
  joints 
  ; 
  the 
  first 
  two 
  joints 
  are 
  tolerably 
  stout, 
  but 
  the 
  

   second 
  is 
  distinctly 
  longer 
  tlian 
  the 
  first 
  or 
  third 
  ; 
  the 
  others 
  

   are 
  small, 
  especially 
  tlie 
  penultimate 
  joint, 
  which 
  is 
  only 
  

   about 
  half 
  the 
  size 
  of 
  the 
  one 
  on 
  cither 
  side. 
  The 
  formula 
  

   shows 
  approximately 
  the 
  lengths 
  of 
  the 
  various 
  joints 
  : 
  — 
  

  

  1.2.3.4.5.6.7.8 
  

  

  14 
  21 
  1(5 
  lU 
  t)i 
  5i 
  3 
  6' 
  

  

  Antennae 
  small, 
  the 
  outer 
  ramus 
  four-jointed. 
  Second 
  

   maxillipeds 
  tolerably 
  stout 
  and 
  armed 
  with 
  a 
  strong 
  terminal 
  

   claw. 
  First 
  pair 
  of 
  thoracic 
  legs 
  also 
  tolerably 
  stout 
  ; 
  the 
  

   outer 
  ramus 
  is 
  rather 
  longer 
  than 
  the 
  first 
  joint 
  of 
  the 
  inner 
  

   one 
  ; 
  the 
  first 
  and 
  second 
  joints 
  are 
  subequal, 
  and 
  the 
  seta 
  

   on 
  the 
  outer 
  distal 
  angle 
  of 
  the 
  first 
  joint 
  is 
  stout 
  and 
  spini- 
  

   form, 
  so 
  also 
  is 
  the 
  seta 
  at 
  the 
  base 
  of 
  tlie 
  joint; 
  end 
  joint 
  

   short 
  and 
  furnished 
  with 
  slender 
  setae 
  on 
  its 
  truncated 
  extre- 
  

   mity 
  ; 
  first 
  joint 
  of 
  the 
  inner 
  ramus 
  moderately 
  expanded 
  

   and 
  reaching 
  nearly 
  to 
  the 
  end 
  of 
  the 
  outer 
  ramus 
  ; 
  it 
  is 
  

   provided 
  M'ith 
  a 
  tolerably 
  long 
  seta 
  on 
  the 
  lower 
  half 
  of 
  the 
  

   inner 
  margin 
  ; 
  a 
  stout 
  spinitorm 
  seta 
  also 
  springs 
  from 
  the 
  

   inner 
  aspect 
  of 
  the 
  basal 
  joint 
  and 
  close 
  to 
  the 
  proximal 
  end 
  

   of 
  the 
  inner 
  ramus 
  ; 
  the 
  second 
  joint 
  of 
  the 
  inner 
  ramus 
  is 
  

   narrower 
  and 
  rather 
  longer 
  than 
  the 
  first, 
  and 
  a 
  long 
  seta 
  

   springs 
  from 
  near 
  the 
  proximal 
  end 
  of 
  the 
  inner 
  margin 
  ; 
  

   the 
  end 
  joint 
  is 
  very 
  small 
  and 
  is 
  provided 
  with 
  two 
  short 
  

   claw-like 
  terminal 
  spines 
  (fig. 
  9). 
  Other 
  natatory 
  legs 
  

   slender 
  and 
  moderately 
  elongated, 
  as 
  shown 
  by 
  the 
  drawing 
  

   (fig. 
  10), 
  which 
  represents 
  the 
  fourth 
  pair. 
  Fifth 
  pair 
  small 
  

   and 
  not 
  very 
  conspicuous 
  ; 
  the 
  end 
  joint 
  is 
  moderately 
  

   narrow 
  and 
  elongated, 
  and 
  bears 
  five 
  moderately 
  slender 
  

   setae 
  round 
  the 
  distal 
  end. 
  Caudal 
  rami 
  short, 
  scarcely 
  

   longer 
  than 
  the 
  last 
  abdominal 
  segment. 
  

  

  A 
  few 
  specimrns 
  of 
  this 
  species 
  were 
  obtained 
  on 
  a 
  ma«s 
  

   of 
  fish 
  ova 
  found 
  by 
  Mr. 
  Vallentin 
  on 
  the 
  shore 
  at 
  low-water 
  

   springs. 
  

  

  This 
  Tisbe 
  resembles 
  in 
  some 
  respects 
  the 
  Tisbe 
  armata, 
  

  

  2G* 
  

  

  