﻿384 
  Dr. 
  C. 
  Chilton 
  on 
  

  

  L. 
  japoni'ca. 
  In 
  side 
  view 
  the 
  small 
  tubercle 
  on 
  the 
  last 
  

   segment 
  presents 
  prettj 
  well 
  the 
  appearance 
  shown 
  by 
  

   Pf'efFer 
  in 
  his 
  side 
  view 
  of 
  L. 
  antaretica. 
  

  

  The 
  upper 
  antennse 
  have 
  the 
  second 
  joint 
  subequal 
  with 
  

   the 
  first 
  and 
  slightly 
  longer 
  than 
  the 
  third, 
  the 
  jflagellum 
  is 
  

   represented 
  by 
  two 
  or 
  three 
  small 
  joints 
  bearing 
  long- 
  

   olfactory 
  setee. 
  I 
  have 
  not 
  seen 
  anything 
  corresponding 
  to 
  

   the 
  small 
  nodule 
  described 
  by 
  Caiman 
  (1910, 
  p. 
  184) 
  as 
  

   perhaps 
  representing 
  a 
  vestige 
  of 
  the 
  inner 
  flagellum. 
  The 
  

   second 
  anteunse 
  do 
  not 
  differ 
  appreciably 
  from 
  those 
  of 
  

   L. 
  lignorum. 
  

  

  In 
  the 
  mouth-parts, 
  the 
  mandibles 
  (PI. 
  XVII. 
  fig. 
  1) 
  difEer 
  

   distinctly 
  from 
  those 
  of 
  the 
  other 
  species 
  in 
  having 
  the 
  palp 
  

   quite 
  small 
  and 
  composed 
  of 
  two 
  subequal 
  slender 
  joints, 
  the 
  

   terminal 
  one 
  of 
  which 
  bears 
  two 
  or 
  three 
  small 
  setse 
  at 
  the 
  

   extremity. 
  The 
  body 
  of 
  the 
  mandible 
  appears 
  to 
  be 
  very 
  

   similar 
  to 
  that 
  of 
  L. 
  Ivpwrum, 
  and 
  ends 
  in 
  a 
  fine 
  sharp 
  

   cutting-edge, 
  which 
  shows 
  no 
  division 
  into 
  separate 
  teeth 
  ; 
  on 
  

   the 
  outer 
  portion 
  between 
  the 
  cutting-edge 
  and 
  the 
  palp 
  is 
  a 
  

   strong 
  subacute 
  projection 
  as 
  in 
  L. 
  Ugnorum, 
  and 
  on 
  the 
  

   inner 
  side 
  there 
  is 
  the 
  usual 
  row 
  of 
  setse, 
  though 
  apparently 
  

   no 
  trace 
  of 
  the 
  molar 
  tubercle. 
  

  

  The 
  cutting-edge 
  of 
  the 
  mandible 
  in 
  L. 
  lignorum 
  is 
  usually 
  

   shown 
  as 
  entire 
  and 
  not 
  divided 
  into 
  teeth 
  ; 
  in 
  one 
  specimen, 
  

   however, 
  that 
  I 
  examined 
  there 
  are 
  faint 
  indications 
  of 
  its 
  

   division 
  into 
  three 
  teeth 
  (fig. 
  6). 
  In 
  this 
  specimen, 
  

   too, 
  the 
  inner 
  surface 
  below 
  the 
  cutting-edge 
  was 
  covered 
  

   with 
  small, 
  closely-set, 
  imbricating 
  teeth 
  forming 
  an 
  efficient 
  

   rasping 
  organ 
  ; 
  probably 
  the 
  same 
  structure 
  is 
  common 
  to 
  

   other 
  specimens, 
  but 
  it 
  is 
  rather 
  difficult 
  of 
  observation, 
  and 
  

   I 
  failed 
  to 
  detect 
  it 
  in 
  some 
  specimens 
  examined, 
  though 
  it 
  is 
  

   quite 
  distinct 
  in 
  the 
  one 
  figured. 
  

  

  The 
  first 
  and 
  second 
  maxillge 
  are 
  essentially 
  the 
  same 
  as 
  

   those 
  of 
  L. 
  lignorum, 
  except 
  that 
  the 
  first 
  maxilla 
  appears 
  to 
  

   be 
  slightly 
  shorter 
  and 
  stouter. 
  

  

  In 
  the 
  maxillipeds 
  (fig. 
  2) 
  the 
  epipod 
  reaches 
  beyond 
  the 
  

   end 
  of 
  the 
  second 
  joint 
  and 
  is 
  rounded 
  at 
  the 
  end, 
  slightly 
  

   narrowed 
  towards 
  the 
  base, 
  and 
  its 
  greatest 
  breadth 
  is 
  about 
  

   one-fourth 
  the 
  length 
  ; 
  the 
  whole 
  margin 
  of 
  it 
  is 
  fringed 
  with 
  

   small 
  finely 
  plumose 
  setse. 
  In 
  other 
  respects 
  the 
  maxilliped 
  

   is 
  hardly 
  distinguishable 
  from 
  that 
  of 
  L. 
  lignorum. 
  

  

  The 
  first 
  pan- 
  of 
  legs 
  (figs. 
  3 
  and 
  4) 
  resembles 
  that 
  of 
  

   L. 
  lignorum, 
  and 
  the 
  accessory 
  spine 
  on 
  the 
  inner 
  side 
  of 
  the 
  

   dactyl 
  is 
  bidentate 
  as 
  in 
  that 
  species, 
  its 
  smaller 
  tooth 
  being 
  

   of 
  minute 
  size 
  : 
  in 
  L. 
  andrewsi, 
  Caiman, 
  the 
  accessory 
  spine 
  

   is 
  tridentate; 
  from 
  the 
  distal 
  end 
  of 
  the 
  propod 
  there 
  springs 
  

  

  