﻿10 
  c. 
  BOVA.LLIDS, 
  lANTHE, 
  

  

  Then 
  follows 
  the 
  second 
  2^0,^" 
  of 
  pleopoda. 
  The 
  coxal 
  joint 
  

   of 
  tlie 
  protopodite 
  is 
  minute 
  and 
  very 
  short; 
  the 
  basal 
  

   joint 
  is 
  strongly 
  developed, 
  laminated, 
  forming 
  a 
  good 
  oper- 
  

   culum 
  for 
  the 
  tender 
  branchial 
  feet; 
  it 
  is 
  rounded 
  at 
  the 
  

   outer 
  margin, 
  corresponding 
  with 
  the 
  form 
  of 
  the 
  branchial 
  

   excavation 
  ; 
  at 
  the 
  posterior 
  end 
  it 
  is 
  finely 
  ciliated; 
  the 
  inner 
  

   margin 
  is 
  straight 
  at 
  its 
  posterior 
  part, 
  and 
  slightly 
  conca- 
  

   vated 
  at 
  the 
  anterior. 
  At 
  the 
  posterior 
  end 
  of 
  this 
  con- 
  

   cavation 
  the 
  endopodite 
  is 
  attached; 
  it 
  consists 
  of 
  three 
  

   joints, 
  the 
  first 
  of 
  which 
  is 
  oval, 
  nearly 
  concealed 
  in 
  a 
  

   duplicature 
  of 
  the 
  laminated 
  basis 
  (Pl. 
  III, 
  fig. 
  30). 
  The 
  

   following 
  joint 
  is 
  shorter 
  and 
  narrower, 
  nearly 
  cylindrical; 
  

   the 
  last 
  is 
  longer 
  than 
  either 
  of 
  the 
  preceding, 
  trigonal, 
  

   narrowed 
  at 
  the 
  apex, 
  and 
  densely 
  beset 
  with 
  stiff 
  hairs, 
  

   directed 
  forwards, 
  contrarily 
  to 
  the 
  direction 
  of 
  the 
  foot 
  

   (Pl. 
  III, 
  fig. 
  31). 
  From 
  the 
  basis 
  arises 
  a 
  two-jointed 
  appen- 
  

   dage, 
  probably 
  representing 
  an 
  epipodite; 
  the 
  first 
  joint 
  is 
  

   elongated 
  and 
  directed 
  forwards; 
  the 
  second 
  is 
  short 
  and 
  

   ilask-formed, 
  with 
  an 
  oval 
  aperture. 
  The 
  function 
  of 
  this 
  

   appendage 
  is 
  possibly 
  respiratory. 
  The 
  first 
  pair 
  of 
  pleopoda 
  

   seems 
  to 
  have 
  no 
  other 
  relation 
  to 
  the 
  respiration 
  than 
  by 
  

   this 
  minute 
  appendage 
  ; 
  the 
  rest 
  of 
  the 
  leg 
  is 
  partly 
  a 
  pro- 
  

   tecting 
  covercle, 
  partly 
  it 
  seems 
  to 
  be 
  in 
  the 
  service 
  of 
  

   reproduction. 
  

  

  The 
  third. 
  pair 
  of 
  pleopoda 
  forms 
  great 
  rounded 
  laminse 
  

   of 
  »branchial» 
  structure, 
  'the 
  transformed 
  bases 
  of 
  the 
  legs, 
  

   and 
  two 
  narrow, 
  flat 
  joints, 
  förming 
  a 
  sort 
  of 
  feet, 
  but 
  of 
  

   so 
  loose 
  a 
  consistence 
  that 
  it 
  seems 
  to 
  serve 
  to 
  no 
  more 
  than 
  

   to 
  put 
  the 
  respiratory 
  water 
  in 
  circulation 
  (Pl. 
  III, 
  fig. 
  32). 
  

  

  The 
  fourth 
  pair 
  is 
  more 
  transformed 
  for 
  the 
  branchial 
  ser- 
  

   vice 
  ; 
  the 
  rounded 
  lamina 
  is 
  greater, 
  the 
  foot-like 
  appendage 
  

   still 
  consists 
  of 
  two 
  joints, 
  but 
  the 
  last 
  is 
  great 
  and 
  tumid 
  and 
  

   serves 
  apparently 
  as 
  an 
  organ 
  of 
  respiration 
  (Pl. 
  III, 
  fig. 
  33). 
  

  

  The 
  fifth 
  and 
  last 
  pair 
  consists 
  of 
  two 
  subaequal 
  laminae, 
  

   so 
  like 
  each 
  other 
  that 
  it 
  is 
  difiicult 
  to 
  say, 
  which 
  of 
  them 
  

   corresponds 
  with 
  the 
  lamina 
  of 
  the 
  preceding 
  pair 
  (Pl. 
  III, 
  

   fig. 
  34). 
  

  

  The 
  uropoda 
  (Pl. 
  III, 
  fig. 
  35) 
  consist 
  of 
  a 
  cylindrical 
  peduncle, 
  

   elongated, 
  and 
  slightly 
  curved 
  at 
  the 
  anterior 
  end, 
  provided 
  

   with 
  some 
  short 
  bristles 
  and 
  stifl" 
  hairs, 
  and 
  two 
  lanceolate 
  

   rami, 
  shorter 
  than 
  the 
  peduncle. 
  The 
  inner 
  is 
  broader 
  and 
  

  

  I 
  

  

  