﻿G. 
  M. 
  Thomson. 
  — 
  New 
  Zealand 
  Crustacea. 
  241 
  

  

  Paramoera 
  tenuicornis, 
  Miers, 
  Cat. 
  N. 
  Z. 
  Crust., 
  p. 
  127. 
  Fig. 
  C.5. 
  

  

  This 
  species, 
  of 
  -wliicli 
  I 
  have 
  examined 
  perfect 
  specimens, 
  must 
  be 
  

   replaced 
  in 
  the 
  genus 
  proposed 
  by 
  its 
  original 
  describer 
  Dana, 
  viz., 
  Melita. 
  

   It 
  differs 
  from 
  Paramoera 
  in 
  having 
  the 
  superior 
  antennae 
  furnished 
  with 
  an 
  

   appendage, 
  and 
  from 
  Moera 
  — 
  in 
  which 
  it 
  is 
  placed 
  by 
  Spence 
  Bate 
  in 
  the 
  

   British 
  Museum 
  Catalogue 
  — 
  in 
  having 
  the 
  posterior 
  pair 
  of 
  pleopoda 
  very 
  

   unequal, 
  with 
  the 
  inner 
  ramus 
  quite 
  rudimentary, 
  and 
  not 
  subfoliaceous. 
  

  

  There 
  are 
  several 
  points 
  in 
  connection 
  with 
  the 
  specific 
  description 
  

   which 
  require 
  amending. 
  Thus 
  the 
  fiagellum 
  of 
  the 
  inferior 
  antennce 
  only 
  is 
  

   terete, 
  that 
  of 
  the 
  upper 
  pair 
  having 
  the 
  joints 
  wider 
  at 
  the 
  apex 
  than 
  at 
  

   the 
  base; 
  the 
  appendage 
  to 
  this 
  pair 
  consists 
  of 
  4 
  joints, 
  and 
  springs 
  from 
  

   the 
  apex 
  of 
  the 
  last 
  joint 
  of 
  the 
  peduncle. 
  The 
  fifth 
  segment 
  of 
  the 
  pleon 
  

   is 
  furnished 
  on 
  the 
  dorsal 
  posterior 
  margin 
  with 
  a 
  crest 
  of 
  spinose 
  setse. 
  

   The 
  antepenultimate 
  and 
  penultimate 
  pairs 
  of 
  pleopoda 
  only 
  reach 
  to 
  the 
  

   extremity 
  of 
  the 
  peduncle 
  of 
  the 
  ultimate. 
  The 
  external 
  ramus 
  of 
  the 
  last 
  

   pan- 
  is 
  very 
  long, 
  while 
  the 
  internal 
  is 
  a 
  mere 
  rudiment. 
  

  

  The 
  specimens 
  examined 
  by 
  me 
  were 
  taken 
  in 
  the 
  Taieri 
  Eiver 
  in 
  fresh 
  

   water, 
  but 
  they 
  had 
  probably 
  come 
  up 
  with 
  the 
  tide, 
  which 
  is 
  felt 
  15 
  miles 
  

   from 
  the 
  mouth. 
  

  

  Genus 
  Gammarus, 
  Fabricius, 
  Ent. 
  Syst. 
  ii., 
  p. 
  514. 
  ; 
  Sjyence 
  Bate, 
  

  

  Brit. 
  Mus. 
  Cat. 
  Amphip. 
  Crust., 
  p. 
  203. 
  

   (The 
  generic 
  characters 
  are 
  taken 
  from 
  the 
  latter 
  authority 
  quoted). 
  

  

  Slender, 
  laterally 
  compressed. 
  Cephalon 
  not 
  produced 
  into 
  a 
  rostrum. 
  

   Pereion 
  and 
  pleon 
  subequal 
  in 
  length. 
  Three 
  posterior 
  segments 
  of 
  the 
  

   pleon 
  having 
  each 
  two 
  or 
  more 
  fasciculi 
  of 
  short 
  stiff 
  spines. 
  Eyes 
  

   reniform, 
  oval 
  or 
  hnear. 
  Antenna 
  long, 
  slender, 
  filiform, 
  having 
  the 
  

   peduncle 
  subequal 
  with 
  the 
  peduncle 
  of 
  the 
  inferior, 
  and 
  carrying 
  a 
  

   secondary 
  appendage. 
  Mandibles 
  having 
  an 
  appendage. 
  Maxillipeds 
  

   having 
  a 
  squamiform 
  plate, 
  arising 
  from 
  the 
  basos 
  and 
  ischium. 
  Gnatho- 
  

   poda 
  subequal, 
  not 
  largely 
  developed. 
  Pereiopoda 
  subequal; 
  coxse 
  of 
  the 
  

   three 
  posterior 
  pairs 
  much 
  shorter 
  than 
  those 
  of 
  the 
  anterior. 
  Posterior 
  

   pair 
  of 
  pleopoda 
  biramous. 
  Telson 
  double. 
  

  

  18. 
  Gammarus 
  harbimanus, 
  nov. 
  sp. 
  Fig. 
  D.l. 
  

  

  Segments 
  of 
  the 
  body 
  smooth. 
  Eyes 
  small, 
  oblong, 
  with 
  dark 
  coloured 
  

   blotches 
  between 
  and 
  posterior 
  to 
  them. 
  Superior 
  antenna 
  with 
  the 
  

   peduncle 
  longer 
  than 
  the 
  fiagellum 
  ; 
  basal 
  joint 
  with 
  a 
  spine 
  on 
  its 
  inferior 
  

   margin; 
  appendage 
  5-jointed, 
  less 
  thmi 
  half 
  as 
  long 
  as 
  the 
  fiagellum, 
  which 
  

   is 
  about 
  10-jointed. 
  Inferior 
  antennjs 
  somewhat 
  shorter 
  than 
  superior, 
  but 
  

   stouter 
  ; 
  peduncle 
  extending 
  to 
  the 
  extremity 
  of 
  the 
  peduncle 
  of 
  the 
  upper 
  

   antennae 
  ; 
  fiagellum 
  stout, 
  short, 
  about 
  6-jointed. 
  Maxillipeds 
  with 
  a 
  dense 
  

  

  hi 
  

  

  