﻿art. 
  12 
  A 
  NEW 
  POLYCHAETOUS 
  ANNELID 
  TREADWELL 
  3 
  

  

  The 
  neuropodial 
  setae 
  differ 
  from 
  one 
  another 
  only 
  in 
  size 
  and 
  

   color 
  and 
  their 
  arrangement 
  is 
  characteristic. 
  At 
  the 
  anterior 
  end 
  

   of 
  the 
  dorsal 
  margin 
  of 
  the 
  obliquely 
  truncated 
  outer 
  end 
  of 
  the 
  

   neuropodium 
  the 
  colorless 
  acicula 
  comes 
  to 
  the 
  surface. 
  Posterior 
  

   to 
  this 
  two 
  large 
  dark-brown 
  setae 
  protrude 
  in 
  such 
  a 
  fashion 
  that 
  

   they 
  form 
  with 
  the 
  acicula 
  an 
  equilateral 
  triangle. 
  Ventral 
  to 
  these 
  

   is 
  a 
  horizontal 
  row 
  of 
  not 
  more 
  than 
  four 
  similar 
  but 
  smaller 
  setae, 
  

   and 
  ventral 
  to 
  these 
  and 
  parallel 
  with 
  them 
  is 
  a 
  second 
  row 
  which 
  

   may 
  have 
  as 
  many 
  as 
  seven 
  setae. 
  These 
  are 
  more 
  slender 
  than 
  the 
  

   dorsal 
  ones 
  but 
  in 
  other 
  respects 
  are 
  similar 
  to 
  them. 
  

  

  The 
  large 
  dorsal 
  setae 
  resemble 
  the 
  ventral 
  ones 
  in 
  form 
  but 
  are 
  

   much 
  larger. 
  The 
  smaller 
  ones, 
  which 
  form 
  a 
  dense 
  tuft 
  at 
  the 
  apex 
  

   of 
  the 
  notopodium. 
  are 
  slender 
  and 
  threadlike 
  with 
  sharp 
  points. 
  

  

  * 
  o 
  

  

  