﻿442 
  Miscellaneous. 
  

  

  On 
  the 
  mesial 
  side 
  of 
  the 
  pedunculated 
  eye 
  there 
  is, 
  beneath 
  

   two 
  tubercles, 
  a 
  special 
  sense-organ 
  of 
  unknown 
  function 
  (frontal 
  

   organ?). 
  The 
  minute 
  structure 
  of 
  the 
  facetted 
  eye 
  and 
  its 
  ganglion 
  

   conies 
  nearest 
  to 
  that 
  of 
  the 
  Mysidae. 
  

  

  The 
  terminal 
  section 
  of 
  the 
  buccal 
  intestine 
  is, 
  as 
  in 
  the 
  Malaco- 
  

   straca, 
  armed 
  with 
  a 
  complex 
  apparatus 
  of 
  chi 
  tin-structures, 
  convert- 
  

   ing 
  it 
  into 
  a 
  gizzard 
  ; 
  this 
  apparatus 
  consists 
  of 
  two 
  cardiac 
  jaws, 
  a 
  

   band 
  of 
  seta3 
  on 
  the 
  right 
  side, 
  two 
  pairs 
  of 
  pyloric 
  plates 
  beset 
  

   with 
  setae, 
  and 
  a 
  funnel-groove 
  extending 
  far 
  into 
  the 
  intestine. 
  

   The 
  liver 
  consists 
  of 
  two 
  anterior 
  sacs 
  projecting 
  into 
  the 
  head, 
  and 
  

   of 
  three 
  pairs 
  of 
  tubular 
  sacs 
  extending 
  backwards 
  as 
  far 
  as 
  the 
  

   last 
  abdominal 
  segment. 
  The 
  middle 
  intestine 
  and 
  posterior 
  hepatic 
  

   sacs 
  are 
  imbedded 
  in 
  a 
  perivisceral 
  mass 
  of 
  connective 
  tissue, 
  which 
  

   also 
  surrounds 
  the 
  sexual 
  glands, 
  the 
  cells 
  of 
  which 
  are 
  filled 
  with 
  

   fat-globules, 
  and 
  are 
  of 
  great 
  importance 
  in 
  the 
  regulation 
  of 
  the 
  

   nourishment 
  at 
  the 
  time 
  of 
  the 
  cessation 
  of 
  feeding. 
  Pregnant 
  females 
  

   and 
  sexually 
  mature 
  males 
  gradually 
  use 
  up 
  the 
  nutriment 
  deposited 
  

   in 
  this 
  tissue, 
  so 
  that, 
  finally, 
  after 
  the 
  disappearance 
  of 
  the 
  fat- 
  

   globules, 
  the 
  perienteric 
  cell-cord 
  completely 
  shrivels 
  up, 
  while 
  the 
  

   blood-spaces 
  of 
  the 
  body-cavity 
  appear 
  enlarged 
  in 
  the 
  same 
  pro- 
  

   portion. 
  At 
  the 
  end 
  of 
  the 
  middle 
  intestines 
  opens 
  an 
  unpaired 
  

   caecum 
  situated 
  above 
  the 
  rectum, 
  the 
  cell-covering 
  of 
  which 
  is 
  

   continued 
  far 
  forward 
  on 
  the 
  dorsal 
  wall 
  of 
  the 
  intestine. 
  

  

  Besides 
  the 
  antennal 
  gland 
  a 
  small 
  shell-gland, 
  reduced 
  almost 
  

   completely 
  to 
  the 
  terminal 
  saccule, 
  is 
  present, 
  in 
  which, 
  as 
  in 
  the 
  

   terminal 
  sac 
  of 
  the 
  former, 
  carmine-granules 
  accumulate, 
  after 
  

   feeding 
  with 
  carmine. 
  The 
  missing 
  looped 
  ducts 
  are 
  replaced 
  by 
  

   e'ujlit 
  pairs 
  of 
  pedal 
  glands, 
  which 
  are 
  coloured 
  blue 
  after 
  feeding 
  

   with 
  indigo-carmine. 
  

  

  The 
  heart 
  extends 
  from 
  the 
  maxillar 
  region 
  through 
  the 
  whole 
  

   middle-body 
  into 
  the 
  fourth 
  segment 
  of 
  the 
  abdomen, 
  and 
  is 
  per- 
  

   forated 
  by 
  seven 
  pairs 
  of 
  ostia, 
  the 
  fourth, 
  fifth, 
  and 
  sixth 
  of 
  which 
  

   are 
  small 
  fissures 
  placed 
  on 
  the 
  dorsal 
  surface, 
  while 
  the 
  rest 
  pertain 
  

   to 
  the 
  right 
  and 
  left 
  lateral 
  surfaces. 
  Besides 
  an 
  anterior 
  and 
  a 
  

   posterior 
  aorta 
  there 
  are 
  ramified 
  arteries 
  in 
  the 
  abdomen 
  and 
  in 
  both 
  

   pairs 
  of 
  antennaa. 
  

  

  The 
  efferent 
  ducts 
  of 
  the 
  sexual 
  glands 
  resemble 
  those 
  of 
  the 
  

   Malacostraca 
  both 
  in 
  position 
  and 
  in 
  their 
  mode 
  of 
  opening. 
  The 
  

   females 
  carry 
  their 
  eggs 
  and 
  young, 
  like 
  the 
  Arthrostraca 
  and 
  other 
  

   Podophthalma, 
  on 
  the 
  pectoral 
  surface 
  of 
  the 
  middle-body 
  between 
  

   the 
  lamellar 
  pairs 
  of 
  limbs 
  and 
  their 
  fans 
  of 
  setae, 
  as 
  in 
  a 
  basket 
  

   through 
  which 
  the 
  water 
  flows, 
  and 
  they 
  also 
  harbour 
  the 
  hatched 
  

   and 
  moulting 
  larvae 
  for 
  a 
  considerable 
  time 
  in 
  this 
  brood-chamber. 
  

  

  The 
  Leptostraca 
  are 
  to 
  be 
  regarded 
  as 
  the 
  first 
  main 
  division 
  of 
  

   the 
  Malacostraca. 
  

  

  The 
  fossil 
  Ceratiocaridae, 
  together 
  with 
  allied 
  palaeozoic 
  genera 
  

   of 
  Crustacea, 
  judging 
  from 
  their 
  possession 
  of 
  movable 
  cephalic 
  flaps, 
  

   belong 
  to 
  the 
  same 
  developmental 
  series 
  as 
  the 
  Leptostraca, 
  but 
  

   cannot 
  be 
  united 
  in 
  the 
  same 
  order 
  with 
  them, 
  as 
  the 
  organization 
  

  

  