﻿Copepoda 
  from 
  the 
  Fatldand 
  Islands. 
  373 
  

  

  abdomen 
  shorty 
  reflexed. 
  The 
  antennules 
  are 
  also 
  short 
  and 
  

   composed 
  of 
  seven 
  joints 
  ; 
  the 
  first 
  three 
  are 
  large, 
  the 
  next 
  

   tliree 
  small 
  and 
  subequal, 
  while 
  the 
  end 
  joint 
  is 
  nearly 
  equal 
  

   in 
  length 
  to 
  that 
  of 
  the 
  two 
  preceding 
  ones 
  combined 
  (fig. 
  2). 
  

  

  The 
  outer 
  ramus 
  of 
  the 
  antennse 
  is 
  only 
  one-jointed, 
  and 
  

   in 
  this 
  respect 
  it 
  differs 
  from 
  some 
  other 
  species 
  which 
  are 
  

   provided 
  with 
  a 
  two-jointed 
  outer 
  ramus, 
  but 
  agrees 
  with 
  

   Pseudothalestris 
  tumida^ 
  G. 
  S. 
  Brady, 
  from 
  Kerguelen 
  

   Island 
  *. 
  The 
  other 
  mouth-appendages 
  are 
  also 
  somewhat 
  

   similar 
  to 
  the 
  species 
  mentioned, 
  especially 
  the 
  second 
  

   maxillipeds, 
  the 
  hand 
  of 
  which 
  is 
  simil 
  irly 
  provided 
  with 
  a 
  

   small 
  seta 
  near 
  the 
  middle 
  of 
  the 
  inner 
  margin 
  (fig. 
  9). 
  

   The 
  first 
  pair 
  of 
  legs 
  has, 
  as 
  usual, 
  the 
  outer 
  ramus 
  very 
  

   short 
  and 
  composed 
  of 
  two 
  distinct 
  joints, 
  the 
  inner 
  ramus 
  is 
  

   elongated 
  and 
  composed 
  of 
  three 
  joints, 
  but 
  the 
  last 
  two 
  are 
  

   very 
  small 
  and 
  subequal, 
  and 
  the 
  terminal 
  claw 
  is 
  elongated 
  

   and 
  slender 
  (fig. 
  8). 
  The 
  other 
  natatory 
  legs 
  are 
  normal. 
  

  

  The 
  fifth 
  pair 
  have 
  the 
  inner 
  portion 
  of 
  the 
  proximal 
  joint 
  

   moderately 
  expanded 
  and 
  furnished 
  with 
  five 
  setae 
  on 
  the 
  

   irregularly 
  rounded 
  apex; 
  the 
  distal 
  joint 
  is 
  small, 
  sub- 
  

   quadriform, 
  and 
  bears 
  five 
  setse 
  arranged 
  as 
  in 
  the 
  drawing 
  

   (fig. 
  10). 
  The 
  caudal 
  rami 
  are 
  very 
  short. 
  

  

  Male 
  unknown. 
  

  

  The 
  length 
  of 
  the 
  specimen 
  represented 
  by 
  the 
  drawing 
  

   (fig. 
  1) 
  is 
  •45 
  mm. 
  (about 
  g'g 
  of 
  an 
  inch). 
  

  

  Hah. 
  Obtained 
  in 
  a 
  small 
  gathering 
  collected 
  by 
  tow-net 
  

   in 
  the 
  vicinity 
  of 
  the 
  Falkland 
  Islands 
  in 
  Nov. 
  1909. 
  Only 
  

   one 
  specimen 
  (a 
  female) 
  was 
  observed. 
  

  

  Remarks. 
  The 
  species 
  described 
  above 
  resembles 
  in 
  some 
  

   respects 
  the 
  Pseudothalestris, 
  G. 
  S. 
  Brady, 
  from 
  Kerguelen 
  

   Island, 
  already 
  referred 
  to, 
  in 
  the 
  structure 
  of 
  the 
  outer 
  

   ramus 
  of 
  the 
  posterior 
  antemise 
  and 
  in 
  the 
  form 
  and 
  arma- 
  

   ture 
  of 
  the 
  second 
  maxillipeds 
  ; 
  but 
  the 
  body 
  is 
  .not 
  so 
  

   tumid, 
  and 
  there 
  are 
  one 
  or 
  two 
  anatomical 
  features 
  in 
  

   which 
  it 
  also 
  apparently 
  differs. 
  

  

  Fam. 
  Diosaccidae. 
  

  

  Genus 
  Amphiascus, 
  G. 
  O. 
  Sars, 
  1905. 
  

  

  Amphiascus 
  proximus, 
  sp. 
  n. 
  (PI. 
  XVI. 
  figs. 
  1-7.) 
  

  

  Female. 
  — 
  Species 
  small 
  : 
  length 
  '56 
  mm. 
  (about 
  -^^ 
  of 
  an 
  

   inch). 
  

  

  Antennules 
  short, 
  composed 
  of 
  eight 
  joints; 
  the 
  first 
  four 
  

  

  * 
  ' 
  Deutsche 
  Siidpolar-Exped. 
  1901-1903-,' 
  Copepoda, 
  p. 
  531, 
  text- 
  

   fig. 
  22. 
  

  

  