﻿G-, 
  M. 
  Thomson. 
  — 
  New 
  Zealand 
  Crustacea. 
  24S 
  

  

  superior 
  antennae 
  in 
  a 
  very 
  striking 
  manner, 
  this 
  being 
  furnished 
  in 
  this 
  

   sex 
  with 
  a 
  multi- 
  articulate 
  flagellum 
  of 
  about 
  13 
  joints. 
  

   19. 
  Themisto 
  antarcUca, 
  Dana, 
  U.S. 
  Explor. 
  Exped., 
  p. 
  1005, 
  pi. 
  69, 
  fig. 
  1 
  ; 
  

   Spence 
  Bate, 
  Brit. 
  Mus. 
  Cat. 
  Amphip. 
  Crust, 
  p. 
  312. 
  

  

  Male, 
  Eyes 
  reddish. 
  Superior 
  antennas 
  with 
  the 
  peduncle 
  3-jointed 
  ; 
  

   second 
  joint 
  extremely 
  short 
  ; 
  third 
  long, 
  slightly 
  arcuate, 
  tapering 
  to 
  the 
  

   extremity, 
  fringed 
  on 
  the 
  lower 
  margin 
  with 
  fine 
  comb-like 
  teeth 
  and 
  

   numerous 
  hairs; 
  flagellum 
  of 
  twelve 
  or 
  thirteen 
  articulations, 
  which 
  

   lengthen 
  towards 
  the 
  extremity, 
  Inferior 
  antenna 
  half 
  as 
  long 
  again 
  as 
  

   the 
  superior; 
  peduncle 
  3-jointed; 
  flagellum 
  of 
  seventeen 
  slender 
  articu- 
  

   lations, 
  basal 
  one 
  long, 
  those 
  succeeding 
  short, 
  but 
  lengthening 
  to 
  the 
  

   extremity. 
  First 
  pair 
  of 
  gnathopoda 
  with 
  a 
  broad 
  carpus, 
  fringed 
  poste- 
  

   riorly 
  with 
  numerous 
  hairs 
  ; 
  propodos 
  about 
  half 
  as 
  broad 
  as 
  carpus, 
  taper- 
  

   ing 
  to 
  the 
  extremity, 
  furnished 
  on 
  the 
  anterior 
  margin 
  with 
  a 
  row 
  of 
  stiff 
  

   cilia. 
  Second 
  pair 
  of 
  gnathopoda 
  having 
  the 
  carpus 
  infero-anteriorly 
  

   produced 
  nearly 
  to 
  the 
  extremity 
  of 
  the 
  propodos, 
  with 
  the 
  inferior 
  margin 
  

   furnished 
  with 
  a 
  few 
  hairs 
  ; 
  propodos 
  slightly 
  tapering, 
  and 
  furnished 
  with 
  

   a 
  few 
  hairs 
  on 
  the 
  superior 
  margin; 
  dactylos 
  short 
  and 
  straight. 
  First 
  

   pair 
  of 
  pereiopoda 
  twice 
  as 
  long 
  as 
  the 
  gnathopoda, 
  having 
  the 
  meros 
  short, 
  

   expanded 
  below; 
  carpus 
  stout, 
  with 
  a 
  few 
  hairs 
  on 
  the 
  infero-posterior 
  

   margin; 
  propodos 
  as 
  long 
  as 
  carpus, 
  slender, 
  arcuate, 
  inner 
  margin 
  double, 
  

   the 
  most 
  prominent, 
  and 
  fringed 
  with 
  closely-set, 
  straight, 
  minute 
  cilia, 
  the 
  

   outer 
  with 
  long 
  straight 
  hairs 
  ; 
  dactylos 
  subulate. 
  Second 
  pair 
  of 
  pereio- 
  

   poda 
  resembling 
  the 
  first, 
  but 
  having 
  the 
  carpus 
  slightly 
  larger. 
  Third 
  pair 
  

   of 
  pereiopoda 
  nearly 
  twice 
  as 
  long 
  as 
  first 
  two; 
  basos 
  stout; 
  meros 
  short; 
  

   carpus 
  long, 
  and 
  furnished 
  on 
  its 
  anterior 
  margin 
  with 
  equi-distant 
  comb- 
  

   hke 
  teeth, 
  and 
  minute, 
  close-set 
  thick 
  cilia 
  between 
  ; 
  propodos 
  long, 
  slightly 
  

   curved 
  and 
  slender, 
  similarly 
  furnished 
  on 
  its 
  anterior 
  margin; 
  dactylos 
  

   short, 
  slender, 
  sharp, 
  and 
  slightly 
  curved. 
  Fourth 
  pair 
  of 
  pereiopoda 
  

   about 
  half 
  the 
  length 
  of 
  the 
  thh"d, 
  and 
  resembling 
  it 
  in 
  form 
  : 
  fifth 
  pair 
  

   like 
  the 
  fourth, 
  but 
  not 
  armed 
  with 
  fine 
  teeth 
  along 
  the 
  anterior 
  margin 
  of 
  

   the 
  propodos. 
  Ultimate 
  ^Dair 
  of 
  pleopoda 
  having 
  the 
  peduncle 
  more 
  than 
  

   four 
  times 
  the 
  length 
  of 
  the 
  telson, 
  and 
  the 
  rami 
  half 
  as 
  long 
  as 
  the 
  

   peduncle, 
  with 
  the 
  margins 
  scarcely 
  serrated 
  ; 
  penultimate 
  pair 
  reaching 
  a 
  

   little 
  beyond 
  the 
  extremity 
  of 
  the 
  peduncle 
  of 
  the 
  ultimate; 
  antepenulti- 
  

   mate 
  reaching 
  a 
  little 
  further 
  than 
  the 
  extremity 
  of 
  the 
  penultimate. 
  Telson 
  

   lanceolate. 
  

  

  Female. 
  Superior 
  antennge 
  with 
  the 
  basal 
  joint 
  of 
  the 
  peduncle 
  nearly 
  

   covering 
  the 
  second; 
  terminal 
  joint 
  (flagellum, 
  according 
  to 
  Sp. 
  Bate) 
  

   elongated, 
  tapering 
  to 
  the 
  point, 
  which 
  is 
  curved 
  like 
  a 
  hook, 
  furnished 
  on 
  

   its 
  lower 
  margin 
  with 
  a 
  row 
  of 
  comb-like 
  teeth. 
  Other 
  characters 
  as 
  above. 
  

  

  Length 
  about 
  | 
  of 
  an 
  inch. 
  

  

  