﻿FIVE 
  NEW 
  SPECIES 
  OF 
  ANOPLURA 
  AND 
  MALLOPHAGA. 
  167 
  

  

  are 
  rather 
  long 
  and 
  truncate 
  at 
  the 
  tips. 
  There 
  are 
  no 
  posterior 
  cornua, 
  but, 
  at 
  the 
  

   posterior 
  end 
  of 
  the 
  sclerite, 
  is 
  a 
  transverse 
  chitinous 
  bar 
  (fig. 
  4, 
  b, 
  tb) 
  which 
  projects 
  

   on 
  each 
  side, 
  each 
  free 
  end 
  being 
  buttressed 
  against 
  the 
  oesophageal 
  sclerite 
  by 
  a 
  

   small 
  piece 
  which 
  runs 
  forward 
  and 
  somewhat 
  downwards, 
  as 
  the 
  bar 
  is 
  not 
  only 
  

   posterior 
  to 
  the 
  sclerite, 
  but 
  also 
  dorsal. 
  Numerous 
  muscle 
  fibres 
  are 
  attached 
  to 
  

   the 
  transverse 
  bar. 
  The 
  two 
  basal 
  pieces 
  (or 
  lingual 
  " 
  glands 
  ") 
  are 
  parallel-sided, 
  

   with 
  truncate 
  anterior 
  and 
  posterior 
  ends. 
  The 
  chitinous 
  chord 
  (or 
  " 
  duct 
  ") 
  bifur- 
  

   cates 
  far 
  forward, 
  where 
  each 
  ramus 
  or 
  branch 
  curves 
  round 
  and 
  runs 
  backward 
  to 
  

   enter 
  the 
  basal 
  piece. 
  The 
  descending 
  and 
  ascending 
  chords 
  are 
  parallel 
  to 
  each 
  other. 
  

   In 
  front, 
  at 
  the 
  point 
  of 
  bifurcation, 
  the 
  chords 
  bear 
  a 
  delicate 
  plate, 
  the 
  dentate 
  

   anterior 
  edge 
  of 
  which 
  projects 
  from 
  the 
  mouth. 
  First 
  maxillae 
  : 
  The 
  palpus 
  is 
  

   fairly 
  long. 
  The 
  first 
  segment 
  is 
  wider 
  distally 
  than 
  proximally, 
  the 
  two 
  middle 
  

   segments 
  about 
  equal 
  in 
  size, 
  and 
  the 
  terminal 
  segment 
  longest 
  and 
  columnar. 
  The 
  

   lobe 
  is 
  rather 
  elongate 
  and 
  narrow. 
  In 
  front, 
  it 
  is, 
  as 
  usual, 
  armed 
  with 
  a 
  patch 
  of 
  

   minute 
  hook-shaped 
  denticles. 
  The 
  lobe 
  is 
  thinly 
  chitinised, 
  except 
  on 
  the 
  outer 
  

   margin 
  behind 
  the 
  patch 
  of 
  hooks, 
  where 
  there 
  is 
  a 
  thickening, 
  for 
  a 
  muscle 
  attach- 
  

   ment. 
  Mandibles 
  as 
  usual. 
  In 
  optical 
  section 
  a 
  series 
  of 
  deep, 
  longitudinal 
  grooves 
  

   are 
  seen 
  to 
  be 
  present. 
  Cushion 
  much 
  broader 
  than 
  long, 
  considerably 
  shorter 
  

   than 
  the 
  cushion 
  of 
  the 
  Goniodidae. 
  It 
  is 
  convex 
  in 
  front, 
  and 
  slightly 
  concave 
  behind, 
  

   the 
  thickened 
  margin 
  being 
  continuous 
  all 
  the 
  way 
  around. 
  In 
  the 
  Goniodidae 
  it 
  

   ceases 
  at 
  the 
  base 
  on 
  each 
  side 
  and 
  the 
  lower 
  margin 
  is 
  therefore 
  separate, 
  at 
  each 
  

   end 
  supported 
  by 
  a 
  narrow 
  longitudinal 
  sclerite 
  which 
  runs 
  backward 
  beneath 
  the 
  

   mandibles. 
  Tentorium 
  : 
  I 
  have 
  ventured 
  to 
  homologise 
  with 
  the 
  tentorium 
  a 
  struc- 
  

   ture 
  of 
  the 
  head, 
  which 
  I 
  do 
  not 
  think 
  has 
  hitherto 
  been 
  described 
  in 
  Mallophaga. 
  

   This 
  is 
  a 
  broad 
  band-like 
  transverse 
  plate 
  situated 
  in 
  the 
  gular 
  region 
  just 
  below 
  the 
  

   integument. 
  The 
  posterior 
  lateral 
  angles 
  project 
  backwards 
  in 
  a 
  well 
  marked 
  pro- 
  

   cess 
  (fig. 
  4, 
  b, 
  t). 
  At 
  each 
  side 
  the 
  band 
  curves 
  upwards 
  to 
  the 
  roof 
  of 
  the 
  skull. 
  

   The 
  perpendicular 
  walls 
  thus 
  formed 
  run 
  forward 
  towards 
  the 
  mouth-parts, 
  joining 
  

   up 
  with 
  the 
  thick 
  chitin 
  which 
  forms 
  the 
  point 
  of 
  articulation 
  to 
  the 
  mandibles. 
  

  

  Alimentary 
  Canal 
  (fig. 
  6, 
  a).— 
  This 
  is 
  of 
  the 
  same 
  general 
  type, 
  which 
  distinguishes 
  

   the 
  Amblycera, 
  but 
  the 
  crop, 
  or 
  ingluvies, 
  is 
  unusually 
  large 
  and 
  without 
  anterior 
  

   diverticula. 
  Its 
  large 
  size 
  and 
  perfect 
  oval 
  shape 
  recalls 
  the 
  crop 
  in 
  the 
  Ischnocera. 
  

   The 
  lining 
  is 
  covered 
  with 
  very 
  minute 
  hairs, 
  and 
  around 
  the 
  lower 
  end 
  of 
  the 
  crop 
  

   is 
  the 
  usual 
  row 
  of 
  teeth 
  (10) 
  or 
  ingluvial 
  comb 
  (fig. 
  6, 
  a, 
  ct). 
  Each 
  tooth 
  is 
  a 
  flat 
  

   sabre-like 
  blade, 
  serrate 
  along 
  one 
  edge. 
  The 
  ventriculus, 
  in 
  the 
  specimens 
  examined 
  

   (which 
  were 
  not 
  very 
  well 
  preserved 
  for 
  the 
  study 
  of 
  the 
  soft 
  parts), 
  is 
  a 
  somewhat 
  

   broad 
  tube 
  without 
  anterior 
  diverticula 
  and 
  connected 
  with 
  the 
  crop 
  by 
  no 
  very 
  

   marked 
  constriction. 
  The 
  rectum 
  is 
  large 
  and 
  globular, 
  or 
  bowl-shaped. 
  The 
  six 
  

   glandular 
  patches 
  are 
  rectangular 
  with 
  rounded 
  angles. 
  

  

  Male 
  Reproductive 
  Organs 
  (fig. 
  6, 
  c). 
  — 
  As 
  usual 
  in 
  the 
  Amblycera, 
  there 
  are 
  six 
  

   testes, 
  three 
  on 
  each 
  side, 
  pear-shaped 
  and 
  sessile 
  on 
  the 
  vas 
  deferens. 
  The 
  vesi- 
  

   cula 
  seminalis 
  bears 
  a 
  curious 
  resemblance 
  to 
  the 
  Ctenophor, 
  Hormiphora 
  (fig. 
  6, 
  c, 
  vs). 
  

   The 
  originally 
  double 
  character 
  of 
  this 
  organ 
  is 
  still 
  indicated 
  by 
  a 
  fine 
  line 
  (or 
  furrow) 
  

   which 
  runs 
  up 
  through 
  the 
  aboral 
  or 
  anterior 
  end. 
  Two 
  accessory 
  glands 
  are 
  present, 
  

   one 
  on 
  each 
  side 
  of 
  the 
  base 
  of 
  the 
  vesicula 
  seminalis. 
  They 
  are 
  attached 
  lower 
  

   down 
  and 
  nearer 
  the 
  upper 
  end 
  of 
  the 
  ductus 
  ejaculatorius 
  than 
  an 
  examination 
  of 
  

  

  