﻿art. 
  29 
  ANNELIDS 
  FROM 
  ALASKA 
  TREADWELL 
  3 
  

  

  and 
  in 
  somites 
  8 
  and 
  9 
  forming 
  an 
  indistinct 
  patch 
  rather 
  than 
  defi- 
  

   nite 
  bands. 
  Toward 
  the 
  posterior 
  end 
  of 
  the 
  body 
  the 
  broad 
  dorsal 
  

   cirri 
  are 
  decidedly 
  brown 
  in 
  color. 
  

  

  The 
  fifteenth 
  parapodium 
  (fig. 
  2) 
  has 
  a 
  truncated 
  neuropodial 
  lobe 
  

   into 
  the 
  apex 
  of 
  which 
  a 
  single 
  acicula 
  extends. 
  The 
  notopodinm 
  is 
  

   represented 
  only 
  by 
  a 
  small 
  rounded 
  lobe 
  and 
  its 
  acicnla 
  is 
  somewhat 
  

   smaller 
  than 
  that 
  of 
  the 
  neuropodium. 
  The 
  dorsal 
  cirrns 
  has 
  a 
  stout 
  

   cirrophore, 
  and 
  the 
  style 
  extends 
  about 
  one-half 
  its 
  length 
  beyond 
  the 
  

   neuropodium. 
  The 
  ventral 
  cirrus 
  is 
  short 
  and 
  slender. 
  In 
  the 
  para- 
  

   podium 
  drawn 
  there 
  are 
  six 
  stout 
  setae 
  in 
  the 
  neuropodium 
  and 
  stubs 
  

   of 
  three 
  or 
  four 
  in 
  the 
  notopodinm. 
  

  

  A 
  parapodium 
  from 
  somite 
  52 
  showed 
  in 
  general 
  much 
  the 
  same 
  

   structure 
  as 
  the 
  above 
  (fig. 
  3) 
  except 
  that 
  the 
  dorsal 
  cirrus 
  has 
  a 
  

   broad 
  flattened 
  style, 
  almost 
  as 
  large 
  as 
  sometimes 
  occurs 
  in 
  the 
  Phyl- 
  

   lodocidae. 
  Some 
  of 
  these 
  have 
  small 
  club-shaped 
  processes 
  visible 
  only 
  

   under 
  high 
  power 
  scattered 
  over 
  the 
  surfaces. 
  

  

  The 
  ventral 
  setae 
  (fig. 
  4) 
  are 
  stout 
  with 
  ends 
  entire 
  and 
  about 
  9 
  

   rows 
  of 
  toothed 
  plates 
  visible 
  in 
  profile 
  as 
  projecting 
  teeth. 
  I 
  was 
  

   unable 
  to 
  find 
  any 
  unbroken 
  dorsal 
  setae, 
  but 
  the 
  few 
  fragments 
  that 
  

   remain 
  indicate 
  that 
  they 
  have 
  very 
  slender 
  shafts 
  with 
  numerous 
  

   transverse 
  rows 
  of 
  delicately 
  toothed 
  plates. 
  

  

  One 
  anal 
  cirrus 
  remains. 
  This 
  is 
  similar 
  to 
  the 
  posterior 
  dorsal 
  

   cirri 
  in 
  general 
  form 
  but 
  is 
  rather 
  more 
  slender. 
  

  

  Type.— 
  The 
  unique 
  holotype, 
  Cat. 
  No. 
  19139, 
  U.S.N.M., 
  was 
  col- 
  

   lected 
  in 
  the 
  mouth 
  of 
  Kotzebue 
  Sound, 
  Alaska, 
  July 
  12, 
  1924, 
  12-17 
  

   fathoms. 
  

  

  o 
  

  

  