﻿TWO 
  NEW 
  FOKMS 
  OF 
  OHONIOSTOMATIDii:. 
  351 
  

  

  longitudinal 
  strip 
  at 
  the 
  inner 
  base 
  of 
  the 
  raaxillag, 
  and 
  this 
  

   strip 
  is 
  posteriorly 
  scarcely 
  produced 
  into 
  a 
  free 
  process 
  ; 
  from 
  

   the 
  anterior 
  part 
  of 
  the 
  inner 
  margin 
  of 
  this 
  strip 
  projects 
  

   another 
  less 
  developed 
  shorter 
  strip 
  backwards 
  and 
  a 
  little 
  

   inwards; 
  no 
  processes 
  are 
  found 
  between 
  the 
  maxillipeds, 
  but 
  

   behind 
  their 
  insertions 
  is 
  seen 
  a 
  narrow, 
  transverse 
  strip, 
  

   which, 
  at 
  the 
  middle, 
  is 
  curved 
  a 
  little 
  backwards, 
  and 
  behind 
  

   this 
  strip 
  still 
  another 
  very 
  narrow 
  strip, 
  interrupted 
  at 
  the 
  

   middle, 
  constitutes 
  the 
  limit 
  between 
  head 
  and 
  thorax. 
  In- 
  

   side 
  the 
  postero-interior 
  angle 
  of 
  each 
  maxilla 
  a 
  short 
  trans- 
  

   verse 
  row 
  of 
  long 
  hairs 
  is 
  found. 
  The 
  maxillipeds 
  [f) 
  con- 
  

   sist 
  of 
  four 
  distinct 
  joints 
  ; 
  the 
  basal 
  joint 
  is 
  rather 
  long 
  and 
  

   slender 
  without 
  hairs 
  ; 
  the 
  fourth 
  joint 
  has 
  the 
  end 
  obtuse, 
  

   and 
  adorned 
  with 
  a 
  few 
  line 
  spines. 
  The 
  lateral 
  margin 
  of 
  

   the 
  head 
  has 
  a 
  row 
  of 
  moderately 
  long 
  hairs, 
  and 
  this 
  row 
  

   begins 
  above 
  the 
  insertion 
  of 
  the 
  antennula; 
  the 
  head 
  has 
  

   besides 
  a 
  short 
  oblique, 
  transverse, 
  dorsal 
  area 
  with 
  rather 
  

   short 
  hairs 
  inside 
  and 
  a 
  little 
  in 
  front 
  of 
  the 
  anterior 
  end 
  of 
  

   the 
  insertion 
  of 
  each 
  antennula 
  (fig. 
  1^), 
  and 
  a 
  short 
  row 
  of 
  

   hairs 
  on 
  the 
  dorsal 
  surface 
  rather 
  near 
  the 
  middle 
  line 
  and 
  

   somewhat 
  in 
  advance 
  of 
  the 
  thorax. 
  The 
  trunk 
  is 
  everywhere, 
  

   with 
  exception 
  of 
  a 
  narrow 
  and 
  badly-defined 
  transverse 
  belt 
  

   at 
  the 
  base 
  on 
  the 
  lower 
  surface, 
  clothed 
  with 
  rather 
  long 
  

   setiform 
  hairs, 
  which 
  show 
  an 
  interesting 
  structure. 
  From 
  

   tiny 
  transverse 
  chitinous 
  knots 
  two 
  or 
  three 
  hairs 
  originate, 
  

   and 
  the 
  middle 
  one 
  is 
  much 
  longer 
  than 
  the 
  others; 
  besides, 
  

   the 
  knots 
  are 
  arranged 
  in 
  short 
  or 
  moderately 
  long, 
  more 
  

   or 
  less 
  regular, 
  transverse, 
  or 
  somewhat 
  oblique 
  rows; 
  the 
  

   length 
  of 
  this 
  clothing 
  is 
  about 
  the 
  same 
  on 
  all 
  parts 
  of 
  the 
  

   trunk 
  and 
  nearly 
  as 
  long 
  as 
  the 
  diameter 
  of 
  the 
  basal 
  joint 
  of 
  the 
  

   maxillipeds. 
  The 
  two 
  pairs 
  of 
  trunk-legs 
  are 
  nearly 
  similarly 
  

   shaped, 
  both 
  consisting 
  of 
  a 
  single 
  truncate 
  joint; 
  the 
  joint 
  

   of 
  the 
  first 
  pair 
  (/ 
  ^) 
  is 
  somewhat 
  longer 
  than 
  thick, 
  and 
  not 
  

   as 
  thick 
  as 
  that 
  of 
  the 
  second 
  pair 
  (Z^), 
  Avhich 
  is 
  as 
  long 
  as 
  

   thick 
  ; 
  the 
  joint 
  of 
  the 
  first 
  pair 
  terminates 
  in 
  two 
  seta3, 
  one 
  

   only 
  a 
  little 
  shorter 
  than 
  the 
  basal 
  joint 
  of 
  the 
  maxillipeds, 
  

   while 
  the 
  other 
  seta 
  is 
  about 
  three 
  times 
  shorter; 
  the 
  joint 
  of 
  

  

  