﻿G. 
  M. 
  Thomson. 
  — 
  Neiv 
  Zealand 
  Crustacea. 
  247 
  

  

  Genus 
  Caprellina, 
  nov. 
  gen. 
  

  

  Body 
  cylindrical. 
  Cephalon 
  confluent 
  with 
  first 
  segment 
  of 
  pereion. 
  

   Pleon 
  rudimentary. 
  Gnatliopoda 
  sub-clielate 
  ; 
  branchiae 
  attached. 
  to 
  second 
  

   pair. 
  Fu-st 
  two 
  pairs 
  of 
  pereiopoda 
  represented 
  by 
  the 
  branchi^ 
  attached 
  

   to 
  then* 
  respective 
  segments 
  ; 
  third 
  pair 
  feebly 
  developed 
  ; 
  two 
  posterior 
  

   pairs 
  well 
  developed, 
  subequal. 
  First 
  and 
  second 
  pairs 
  of 
  pleopoda 
  

   rudimentary 
  in 
  the 
  male, 
  rest 
  obsolete. 
  

  

  This 
  genus 
  appears 
  to 
  be 
  intermediate 
  between 
  Cercofs 
  and 
  Caprella. 
  

   Prom 
  the 
  former, 
  it 
  differs 
  in 
  not 
  having 
  the 
  pleopoda 
  developed, 
  but 
  agrees 
  

   with 
  it 
  in 
  having 
  branchiffi 
  attached 
  to 
  the 
  second 
  gnathopoda. 
  In 
  respect 
  

   to 
  this 
  latter 
  character 
  it 
  differs 
  from 
  its 
  nearer 
  ally 
  Caprella, 
  and 
  also 
  in 
  

   having 
  the 
  third 
  pair 
  of 
  pereiopoda 
  feebly 
  developed. 
  

  

  The 
  genus 
  contains 
  only 
  the 
  following 
  species 
  : 
  — 
  

  

  22. 
  Caprellina 
  novcB-zealandice, 
  nov. 
  sp. 
  Fig. 
  D.6. 
  

  

  Body 
  slender. 
  Second 
  and 
  third 
  segments 
  of 
  pereion 
  shorter 
  than 
  the 
  

   three 
  following 
  ; 
  last 
  segment 
  very 
  short. 
  Superior 
  antenna 
  nearly 
  half 
  as 
  

   long 
  as 
  animal; 
  basal 
  joint 
  of 
  peduncle 
  stout, 
  two 
  succeeding 
  joints 
  long 
  

   and 
  slender; 
  flagellum 
  setose, 
  semi- 
  articulate 
  at 
  the 
  basal 
  end, 
  ending 
  in 
  

   "about 
  ten 
  articulations. 
  Inferior 
  antennae 
  very 
  short, 
  reaching 
  to 
  middle 
  of 
  

   penultimate 
  joint 
  of 
  peduncle 
  of 
  superior. 
  First 
  pair 
  of 
  gnathopoda 
  with 
  

   the 
  propodos 
  ovate, 
  the 
  palm 
  extending 
  along 
  the 
  inferior 
  margin, 
  fringed 
  

   with 
  ciha, 
  and 
  with 
  two 
  spines 
  at 
  the 
  base; 
  dactylos 
  sparingly 
  ciliated 
  on 
  

   inner 
  margin. 
  Second 
  pair 
  of 
  gnathopoda 
  much 
  larger 
  than 
  first, 
  and 
  

   having 
  the 
  basos 
  very 
  long. 
  Propodos 
  long, 
  narrow 
  ovate, 
  palm 
  extending 
  

   along 
  half 
  the 
  inferior 
  margin, 
  hollowed 
  out, 
  and 
  with 
  two 
  or 
  three 
  small 
  

   spines 
  at 
  the 
  denticulation 
  which 
  receives 
  the 
  point 
  of 
  the 
  dactylos, 
  and 
  a 
  

   tooth 
  near 
  the 
  hinge; 
  dactylos 
  slender, 
  arcuate. 
  Third 
  pair 
  of 
  pereiopoda 
  

   very 
  small, 
  but 
  with 
  well-developed 
  carpus, 
  propodos 
  and 
  dactylos. 
  Fourth 
  

   and 
  fifth 
  pairs 
  of 
  pereiopoda 
  long 
  ; 
  propoda 
  well-developed, 
  narrow- 
  

   ovate, 
  with 
  slightly 
  excavated 
  palms 
  fringed 
  with 
  strong 
  spines; 
  dactylos 
  

   minutely 
  ciliate 
  on 
  inner 
  margin. 
  Two 
  pairs 
  of 
  pleopoda 
  present, 
  one- 
  

   jointed, 
  filiform, 
  fringed 
  with 
  minute, 
  comb-like 
  cilia. 
  Colour 
  pale 
  red, 
  

   with 
  dark 
  spots 
  and 
  markings. 
  Length 
  -8 
  inch. 
  

  

  Dunedin, 
  in 
  rock 
  pools. 
  

  

  DESCEIPTION 
  OF 
  PLATE 
  X. 
  

  

  Fig. 
  A 
  (all 
  enlarged) 
  — 
  

  

  1. 
  Crangon 
  australis 
  : 
  (a), 
  head 
  viewed 
  from 
  above, 
  magn. 
  2 
  ; 
  (6), 
  leg 
  of 
  first 
  pair, 
  

  

  magn. 
  6 
  ; 
  (c), 
  leg 
  of 
  second 
  pair, 
  magn. 
  3. 
  

  

  2. 
  Leander 
  fliwiatilis, 
  magn. 
  1^: 
  (a), 
  rostrum, 
  magn. 
  4. 
  

  

  3. 
  Oniscus 
  punctatus, 
  magn. 
  2 
  : 
  (a), 
  caudal 
  stylet, 
  magn. 
  10. 
  

  

  4. 
  Ligia 
  quadrata, 
  magn. 
  1^ 
  : 
  (a), 
  tail 
  and 
  caudal 
  stylets, 
  magn. 
  ii 
  

  

  