﻿260 
  Transactions. 
  — 
  Zoology, 
  

  

  Legion 
  II. 
  Branchiopoda. 
  

   Brancliiee 
  attached 
  to 
  the 
  legs 
  ; 
  legs 
  from 
  four 
  to 
  sixty 
  paks. 
  

  

  Order 
  I. 
  Phjdlopoda. 
  

  

  Legs 
  fi'om 
  eleven 
  to 
  sixty 
  pairs 
  in 
  number 
  ; 
  joints 
  foliaceous 
  and 
  

  

  branchiiform, 
  chiefly 
  adapted 
  for 
  respiration 
  and 
  not 
  motion 
  ; 
  eyes 
  two 
  or 
  

  

  three, 
  sometimes 
  pedunculated; 
  antennte 
  one 
  or 
  two 
  pairs, 
  neither 
  adapted 
  

  

  for 
  swimming. 
  

  

  Fain. 
  I. 
  Apodidffi. 
  

  

  Feet 
  sixty 
  pairs. 
  Antennae 
  — 
  only 
  one 
  pan- 
  — 
  short, 
  styliform. 
  Eyes 
  two, 
  

  

  sessile. 
  Body 
  multi-articulate, 
  the 
  greater 
  part 
  covered 
  by 
  a 
  shield-like 
  

  

  carapace. 
  

  

  Genus 
  I. 
  Lepidurus, 
  Leach. 
  

  

  Last 
  segment 
  of 
  the 
  body 
  produced 
  into 
  a 
  lamina, 
  which 
  projects 
  to 
  

  

  some 
  distance 
  between 
  the 
  caudal 
  filaments. 
  First 
  pair 
  of 
  legs 
  short. 
  

  

  1. 
  Lepidurus 
  kirkii, 
  nov. 
  sp. 
  Fig. 
  E.4. 
  

  

  Carapace 
  very 
  broadly 
  oval, 
  covering 
  nearly 
  the 
  whole 
  abdomen, 
  very 
  

   membranous. 
  Keel 
  visible 
  along 
  the 
  whole 
  back, 
  becoming 
  more 
  prominent 
  

   at 
  its 
  posterior 
  extremity. 
  Posterior 
  notch 
  with 
  from 
  eleven 
  to 
  thirteen 
  

   acute 
  teeth, 
  inter-dental 
  portions 
  smooth. 
  Edges 
  of 
  the 
  carapace 
  very 
  

   slightly 
  serrated 
  towards 
  its 
  posterior 
  angles. 
  Appendages 
  of 
  the 
  first 
  pair 
  

   of 
  feet 
  more 
  developed 
  than 
  is 
  usual 
  in 
  the 
  species 
  of 
  this 
  genus, 
  external 
  

   branch 
  being 
  about 
  one-fourth 
  as 
  long 
  as 
  the 
  carapace. 
  Segments 
  of 
  the 
  

   abdomen 
  studded 
  with 
  a 
  row 
  of 
  numerous, 
  stout, 
  curved 
  spines. 
  Caudal 
  

   lamella 
  oval, 
  evenly 
  rounded 
  at 
  the 
  extremity, 
  margins 
  finely 
  and 
  acutely 
  

   serrate 
  ; 
  dorsal 
  row 
  of 
  spines 
  extending 
  about 
  two-thirds 
  of 
  its 
  length. 
  

   Caudal 
  setae 
  more 
  than 
  half 
  as 
  long 
  as 
  the 
  body, 
  densely 
  hirsute. 
  Colour 
  

   pale 
  olive 
  green. 
  Length, 
  including 
  caudal 
  lamella, 
  1-25 
  inch 
  ; 
  breadth 
  of 
  

   carapace 
  (about) 
  -75 
  inch. 
  

  

  Wellington, 
  T. 
  W. 
  Kirk, 
  juur. 
  

  

  2. 
  Lepidurus 
  compressus, 
  nov. 
  sp. 
  Fig. 
  E.5. 
  

  

  Carapace 
  oval, 
  not 
  spreading, 
  but 
  somewhat 
  arched, 
  hardly 
  covering 
  the 
  

   abdomen, 
  keeled 
  only 
  at 
  the 
  extremity. 
  Posterior 
  notch 
  very 
  deep, 
  with 
  

   about 
  twelve 
  very 
  small 
  teeth, 
  and 
  minute 
  serrations 
  between. 
  Lower 
  

   margin 
  of 
  carapace 
  smooth. 
  Appendages 
  of 
  first 
  pair 
  of 
  feet 
  short, 
  hardly 
  

   extending 
  beyond 
  edge 
  of 
  carapace. 
  Segments 
  of 
  abdomen 
  with 
  a 
  row 
  of 
  

   small, 
  straight 
  spines. 
  Caudal 
  lamella 
  as 
  in 
  the 
  previous 
  species, 
  but 
  with 
  

   the 
  keel 
  extending 
  to 
  its 
  extremity, 
  and 
  sparingly 
  toothed. 
  Caudal 
  set^ 
  

   densely 
  hirsute, 
  not 
  half 
  as 
  long 
  as 
  the 
  body. 
  Colour 
  dark 
  olive 
  green. 
  

   Length 
  -8 
  inch 
  ; 
  breadth 
  only 
  about 
  -3 
  inch. 
  

  

  Collected 
  by 
  Prof. 
  Hutton 
  in 
  pools 
  at 
  Waikouaiti, 
  and 
  at 
  Queenstown 
  

   (Lake 
  Wakatipu.) 
  

  

  