﻿CEUSTACEA. 
  211 
  

  

  dactyl, 
  where 
  there 
  are 
  a 
  few 
  hairs), 
  acute 
  at 
  their 
  apices, 
  and 
  den- 
  

   ticulated 
  ou 
  the 
  inner 
  margins 
  only 
  at 
  base, 
  the 
  margins 
  (in 
  their 
  

   distal 
  half) 
  thin-edged 
  and 
  entire. 
  Ambulatory 
  legs 
  of 
  moderate 
  

   length 
  and 
  rather 
  compressed 
  ; 
  the 
  dactyli 
  very 
  short. 
  Colour 
  (in 
  

   spirit) 
  purplish 
  or 
  fuscous 
  brown. 
  Length 
  a 
  little 
  over 
  5 
  lines 
  

   (11 
  millim.), 
  breadth 
  nearly 
  8 
  lines 
  (1G| 
  miUim.). 
  

  

  Two 
  specimens 
  (males) 
  were 
  obtained 
  on 
  the 
  beach 
  at 
  Port 
  

   Darwin 
  (No. 
  176). 
  

  

  The 
  absence 
  of 
  any 
  distinct 
  lobation 
  of 
  the 
  carapace 
  or 
  of 
  distinct 
  

   antero-lateral 
  marginal 
  teeth 
  is 
  very 
  characteristic 
  of 
  this 
  species, 
  

   which 
  is 
  also 
  distinguished 
  by 
  its 
  quadrilobate 
  front. 
  (See 
  fig. 
  c.) 
  

  

  I 
  at 
  first 
  referred 
  this 
  species 
  to 
  the 
  genus 
  Actcea, 
  not 
  having 
  

   observed 
  the 
  notches 
  in 
  the 
  front 
  of 
  the 
  endostome*, 
  which 
  in 
  one 
  

   Bpecimeu 
  are 
  nearly 
  obliterated. 
  In 
  a 
  specimen 
  sent 
  by 
  Mr. 
  

   Haswell 
  from 
  Port 
  Denison, 
  which 
  in 
  its 
  narrower 
  carapace 
  con- 
  

   nects 
  this 
  species 
  with 
  Atergatopsls, 
  these 
  notches 
  are 
  deep 
  and 
  well 
  

   defined. 
  In 
  two 
  specimens 
  in 
  the 
  Museum 
  collection 
  which 
  I 
  refer 
  

   to 
  the 
  typical 
  Banareia 
  annata, 
  A. 
  M.-Edwards 
  (since 
  they 
  agree 
  

   with 
  that 
  species 
  in 
  all 
  particulars 
  except 
  in 
  the 
  notches 
  of 
  the 
  

   endostome), 
  they 
  are 
  nearly 
  obliterated. 
  

  

  The 
  genus 
  Banareia 
  apparently 
  connects 
  the 
  genera 
  Actcea 
  and 
  

   Atergatopsls, 
  and 
  will 
  have, 
  perhaps, 
  to 
  be 
  united 
  with 
  the 
  latter, 
  

   with 
  which 
  it 
  agrees 
  in 
  the 
  some^yhat 
  broader 
  basal 
  antennal 
  joint 
  

   and 
  narrow 
  naked 
  acute 
  finger-tips. 
  

  

  42. 
  Xantho 
  macgillivrayi. 
  (Plate 
  XX. 
  fig. 
  C.) 
  

  

  Carapace 
  transverse, 
  of 
  the 
  form 
  usual 
  in 
  this 
  genus, 
  with 
  the 
  

   cervical 
  suture 
  and 
  the 
  depressions 
  separating 
  the 
  prominences 
  of 
  

   the 
  postfrontal, 
  gastric, 
  hepatic, 
  and 
  branchial 
  regions 
  very 
  distinct 
  ; 
  

   those 
  lobules 
  are 
  themselves 
  granulated, 
  the 
  granules 
  being 
  for 
  the 
  

   most 
  part 
  disposed 
  in 
  short 
  transverse 
  raised 
  lines 
  or 
  low 
  ridges, 
  

   which 
  are 
  most 
  prominent 
  on 
  the 
  anterior 
  part 
  of 
  the 
  carapace 
  ; 
  the 
  

   intestinal 
  region 
  is 
  plane 
  and 
  more 
  or 
  less 
  punctulated. 
  The 
  front 
  

   is 
  rather 
  prominent, 
  and 
  (in 
  an 
  adult 
  examj^le) 
  more 
  than 
  one 
  fourth 
  

   the 
  greatest 
  width 
  of 
  the 
  carapace, 
  and 
  is 
  divided 
  by 
  a 
  very 
  slight 
  

   median 
  notch 
  into 
  two 
  truncated 
  lobes, 
  exterior 
  to 
  which 
  on 
  each 
  

   side 
  is 
  a 
  small 
  and 
  less 
  prominent 
  tooth, 
  formed 
  b}^ 
  the 
  inner 
  and 
  

   upper 
  angle 
  of 
  the 
  orbit 
  ; 
  the 
  antero-lateral 
  margins 
  are 
  armed 
  with 
  

   four 
  rather 
  small 
  but 
  acute 
  and 
  well-defined 
  teeth, 
  which 
  increase 
  

   regularly 
  in 
  size 
  from 
  the 
  first 
  to 
  the 
  last 
  ; 
  the 
  subhepatic 
  and 
  ptery- 
  

   gostomian 
  regions 
  and 
  the 
  postero-lateral 
  margins 
  of 
  the 
  carapace 
  

   are 
  granulated. 
  There 
  is 
  a 
  small 
  tooth 
  at 
  the 
  outer 
  and 
  another 
  

   at 
  the 
  inner 
  suborbital 
  angle. 
  The 
  male 
  postabdomen 
  is 
  o-jointed, 
  

   the 
  third 
  to 
  fifth 
  segments 
  coalescent 
  ; 
  that 
  of 
  the 
  female 
  is 
  7-jointcd. 
  

   The 
  eye-peduncles 
  are 
  small, 
  and 
  thickened 
  at 
  their 
  bases. 
  The 
  

   basal 
  antennal 
  joints 
  are 
  in 
  contact 
  with 
  the 
  subfrontal 
  lobes. 
  The 
  

   outer 
  maxillipedes 
  present 
  nothing 
  remarkable, 
  having 
  the 
  ischium- 
  

  

  * 
  Annales 
  de 
  la 
  Soc. 
  Entoui. 
  cTe 
  France, 
  6cr. 
  4, 
  ix. 
  p. 
  168, 
  pi. 
  viii. 
  (18G9). 
  

  

  p2 
  

  

  