﻿730 
  REPORT 
  OP 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [24 
  

  

  Trophonia 
  aspera 
  (Stimpson) 
  Verrill. 
  

  

  We 
  refer 
  two 
  specimens 
  — 
  one 
  entire, 
  the 
  other 
  a 
  fragment 
  — 
  to 
  Stimp- 
  

   son's 
  species, 
  with, 
  however, 
  some 
  doubt. 
  Professor 
  Verrill 
  has 
  referred 
  

   some 
  form 
  to 
  Trophonia 
  aspera, 
  but 
  without 
  description, 
  and 
  Stimpson's 
  

   description 
  is 
  so 
  defective 
  as 
  to 
  make 
  identification 
  doubtful, 
  if 
  not 
  im- 
  

   possible. 
  On 
  our 
  specimens 
  the 
  dorsal 
  setae 
  are 
  more 
  strongly 
  curved, 
  

   and 
  the 
  papillae 
  of 
  the 
  body 
  longer 
  and 
  stouter 
  than 
  on 
  T. 
  plumosa. 
  

   There 
  are 
  four 
  or 
  five 
  dorsal 
  setae 
  in 
  each 
  bundle. 
  They 
  decrease 
  in 
  

   length 
  and 
  increase 
  in 
  curvature 
  from 
  above 
  downward. 
  

  

  Sandy 
  mud, 
  6-10 
  fathoms. 
  

  

  ZOBUS, 
  n. 
  g. 
  

  

  Tentacles 
  and 
  branchiae 
  arise 
  from 
  a 
  protrusible 
  cylindrical 
  stalk. 
  

   Setae 
  of 
  anterior 
  segments 
  prolonged 
  to 
  form 
  a 
  cephalic 
  cage. 
  Setffi 
  all 
  

   capillary. 
  Body 
  covered 
  with 
  papillae. 
  

  

  Zorus 
  sarsi, 
  n. 
  sp. 
  

   (Pl. 
  V, 
  Fig. 
  G7.) 
  

  

  The 
  branchiae 
  of 
  this 
  species 
  are 
  dark 
  green, 
  flattened, 
  of 
  uniform 
  

   width, 
  reaching 
  in 
  full 
  extension 
  nearly 
  to 
  the 
  end 
  of 
  the 
  cephalic 
  cage; 
  

   four 
  pairs. 
  

  

  The 
  tentacles 
  are 
  white, 
  shorter 
  and 
  stouter 
  than 
  the 
  branchiae, 
  

   smooth 
  above 
  and 
  at 
  the 
  sides, 
  canaliculate 
  below, 
  with 
  the 
  sides 
  of 
  

   the 
  canal 
  scolloped. 
  

  

  The 
  upper 
  setae 
  of 
  the 
  first 
  segment 
  are 
  about 
  one-third 
  longer 
  than 
  

   the 
  width 
  of 
  the 
  fifth 
  segment; 
  those 
  of 
  the 
  second 
  segment 
  not 
  quite 
  

   so 
  long 
  ; 
  the 
  lower 
  setae 
  of 
  these 
  two 
  segments 
  are 
  a 
  little 
  shorter 
  than 
  

   the 
  last. 
  These 
  four 
  bundles 
  of 
  seta 
  1 
  form 
  the 
  cephalic 
  ,cage 
  ; 
  for 
  while 
  

   the 
  dorsal 
  setae 
  of 
  the 
  next 
  three 
  segments 
  are 
  directed 
  forwards, 
  they 
  

   do 
  not 
  reach 
  beyond 
  the 
  head. 
  

  

  After 
  the 
  first 
  two 
  segments 
  the 
  length 
  of 
  the 
  dorsal 
  sche 
  is 
  about 
  

   equal 
  to 
  the 
  width 
  of 
  the 
  body, 
  or 
  even 
  a 
  little 
  longer 
  (fig. 
  07) 
  ; 
  they 
  

   do 
  not 
  increase 
  in 
  length 
  on 
  the 
  posterior 
  segments, 
  but 
  seem 
  to 
  do 
  so, 
  

   owing 
  to 
  the 
  decrease 
  in 
  the 
  diameter 
  of 
  the 
  body. 
  On 
  a 
  few 
  of 
  the 
  

   anterior 
  segments 
  the 
  ventral 
  setae 
  are 
  a 
  little 
  shorter 
  than 
  the 
  dorsal 
  

   setae, 
  but 
  soon 
  become 
  of 
  the 
  same 
  length. 
  

  

  The 
  setae 
  are 
  all 
  of 
  one 
  kind, 
  delicate, 
  transversely 
  striate, 
  capillary. 
  

  

  The 
  diameter 
  of 
  the 
  body 
  is 
  greatest 
  from 
  the 
  fifth 
  to 
  about 
  the 
  tenth 
  

   segment; 
  before 
  the 
  fifth 
  there 
  is 
  a 
  rapid 
  falling 
  off 
  in 
  width; 
  behind 
  

   the 
  tenth 
  a 
  gradual 
  diminution, 
  giving 
  for 
  the 
  posterior 
  segments 
  about 
  

   one-third 
  the 
  greatest 
  diameter. 
  

  

  The 
  middle 
  third 
  of 
  the 
  body 
  is 
  concave 
  dorsally 
  (tig. 
  07); 
  rounded 
  

   at 
  the 
  sides 
  and 
  below 
  ; 
  anterior 
  and 
  posterior 
  thirds 
  regularly 
  rounded. 
  

  

  