﻿G. 
  M. 
  Thomson. 
  — 
  On 
  the 
  New 
  Zealand 
  Entomosfcraca. 
  255 
  

  

  fringed 
  setae. 
  Termiual 
  claws 
  of 
  tlie 
  legs 
  long 
  and 
  curved, 
  those 
  of 
  last 
  

   pair 
  pectinately 
  toothed. 
  Abdominal 
  lobes 
  terminating 
  in 
  two 
  short, 
  

   unequal, 
  fringed 
  setEe, 
  

  

  Length 
  Jy 
  inch 
  ; 
  height 
  ^^ 
  inch. 
  

  

  In 
  AlgcB 
  along 
  with 
  preceding 
  species. 
  Ofcago 
  Harbour. 
  

  

  Genus 
  2. 
  Loxoconcha, 
  G.O.Sars. 
  

   Valves 
  sub-rhomboidal 
  in 
  shape, 
  surface 
  usually 
  marked 
  with 
  fine 
  con- 
  

   centric 
  pittings 
  and. 
  circular 
  papilla; 
  ventral 
  margins 
  forming 
  a 
  thin 
  and 
  

   more 
  or 
  less 
  prominent 
  keel 
  behind 
  the 
  middle 
  ; 
  posterior 
  dorsal 
  margin 
  

   obhquely 
  truncate. 
  Limbs 
  of 
  the 
  animal 
  slender 
  and 
  colourless. 
  Upper 
  

   antennas 
  very 
  slender, 
  six 
  -jointed, 
  last 
  joint 
  very 
  long, 
  linear 
  and 
  bearing 
  

   long, 
  simple 
  setae; 
  lower 
  antennse 
  four-jointed, 
  third 
  joint 
  long 
  and 
  narrow 
  ; 
  

   flagellum 
  long 
  and 
  hi- 
  articulate. 
  Mandibular 
  palp 
  three-jointed, 
  bearing 
  a 
  

   distinct 
  branchial 
  appendage. 
  Lowest 
  seta 
  of 
  the 
  branchial 
  plate 
  of 
  first 
  

   pair 
  of 
  jaws 
  deflexed. 
  Abdomen 
  terminated 
  by 
  a 
  hairy, 
  conical 
  process 
  ; 
  

   postabdominal 
  lobes 
  bearing 
  two 
  moderately 
  long, 
  subequal 
  setse. 
  

  

  " 
  The 
  genus 
  is 
  well 
  characterised 
  by 
  the 
  oblique 
  ' 
  peach-stone 
  ' 
  outline 
  

   of 
  the 
  carapace, 
  and 
  by 
  the 
  very 
  slender 
  setose, 
  but 
  non-spinous 
  limbs 
  of 
  

   the 
  animal." 
  

   1. 
  Loxoconcha 
  punctata, 
  nov. 
  sp. 
  Fig. 
  B.3 
  a-k. 
  

  

  Valves 
  of 
  the 
  male 
  sub-rhomboidal 
  ; 
  greatest 
  height 
  less 
  than 
  two- 
  

   thirds 
  the 
  length 
  ; 
  extremities 
  obliquely 
  rounded, 
  whole 
  lower 
  margin 
  more 
  

   or 
  less 
  flattened 
  and 
  keeled, 
  minutely 
  ciliate. 
  Viewed 
  from 
  above, 
  evenly 
  

   convex, 
  widest 
  in 
  the 
  middle, 
  and 
  tapering 
  to 
  both 
  ends. 
  Surface 
  marked 
  

   with 
  dark 
  spots 
  and 
  numerous 
  translucent 
  punctations. 
  Colour 
  grejdsh, 
  

   shining 
  and 
  somewhat 
  translucent. 
  Valves 
  of 
  the 
  female 
  rather 
  longer, 
  

   more 
  reniform 
  in 
  outline 
  and 
  usually 
  much 
  more 
  opaque 
  ; 
  keel 
  not 
  so 
  

   prominently 
  flattened. 
  Hinge 
  processes 
  well 
  marked 
  ; 
  intervening 
  portion 
  

   of 
  margin 
  crenulated. 
  Eyes 
  distinct 
  and 
  separate. 
  Superior 
  antennae 
  very 
  

   sparingly 
  setose 
  : 
  setae 
  long. 
  Third 
  joint 
  of 
  inferior 
  anteunae 
  with 
  two 
  

   set£e 
  above 
  the 
  middle 
  of 
  the 
  posterior 
  margin, 
  and 
  pectinately 
  toothed 
  

   towards 
  the 
  extremity. 
  Urticating 
  sets 
  reaching 
  to 
  extremity 
  of 
  antenna 
  • 
  

   glands 
  large. 
  Terminal 
  claws 
  of 
  all 
  the 
  feet 
  long 
  and 
  curved. 
  Length 
  A- 
  

   inch 
  ; 
  height 
  ^^^ 
  inch. 
  

  

  Among 
  seaweed, 
  along 
  with 
  the 
  two 
  preceding 
  species 
  of 
  Cythere, 
  in 
  

   Otago 
  Harbour. 
  

  

  This 
  appears 
  to 
  be 
  a 
  very 
  variable 
  species, 
  particularly 
  in 
  the 
  texture 
  of 
  

   the 
  shell. 
  In 
  some 
  the 
  valves 
  are 
  nearly 
  translucent, 
  while 
  gradations 
  can 
  

   be 
  traced 
  up 
  to 
  complete 
  opacity. 
  

  

  Sect. 
  II. 
  Myodocopa. 
  

   Inferior 
  antenna 
  two 
  -bran 
  chad 
  ; 
  one 
  branch 
  rudimentary, 
  the 
  other 
  

   powerful, 
  mauy-joiuted, 
  with 
  long 
  natatory 
  set^e; 
  mandibular 
  palp 
  very 
  

  

  