﻿712 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [6] 
  

  

  tiou. 
  The 
  basal 
  article 
  of 
  the 
  ventral 
  cirri 
  forms 
  at 
  least 
  one-half 
  the 
  

   entire 
  length 
  of 
  the 
  ventral 
  cirri. 
  The 
  eyes 
  are 
  small, 
  red, 
  posterior. 
  

   The 
  general 
  color 
  is 
  grayish-green, 
  or 
  greenish-gray. 
  Low 
  water 
  and 
  

   shallow 
  dredging; 
  sand 
  and 
  mud. 
  

  

  Eteone 
  trilineata 
  n. 
  sp. 
  

  

  (Pl. 
  I, 
  Figs. 
  5-8; 
  Pi,. 
  II, 
  Fig. 
  9.) 
  

  

  The 
  length 
  of 
  the 
  head 
  is 
  about 
  equal 
  to 
  its 
  greatest 
  width 
  (fig. 
  5); 
  

   antennae 
  stout, 
  tapering, 
  equal, 
  their 
  length 
  a 
  little 
  more 
  than 
  half 
  the 
  

   length 
  of 
  the 
  head; 
  eyes 
  large, 
  posterior, 
  circular, 
  black. 
  

  

  First 
  segment 
  longer 
  and 
  wider 
  than 
  the 
  second 
  ; 
  tentacular 
  cirri 
  very 
  

   long 
  for 
  the 
  genus; 
  upper 
  pair 
  reaching 
  back 
  to 
  the 
  middle 
  or 
  to 
  the 
  

   posterior 
  margin 
  of 
  the 
  fourth 
  setigerons 
  segment, 
  quite 
  large 
  at 
  origin, 
  

   tapering 
  at 
  first 
  rapidly, 
  then 
  more 
  gradually, 
  the 
  outer 
  third 
  quite 
  

   delicate; 
  the 
  lower 
  pair 
  are 
  about 
  one-half 
  as 
  long 
  as 
  the 
  upper 
  and 
  

   relatively 
  stouter. 
  

  

  The 
  dorsal 
  cirri 
  on 
  the 
  anterior 
  segments 
  (fig. 
  7) 
  are 
  in 
  contact 
  with 
  

   the 
  feet, 
  are 
  very 
  wide, 
  outer 
  and 
  lateral 
  margins 
  regularly 
  rounded, 
  

   attached 
  margin 
  concave, 
  basal 
  article 
  short 
  and 
  stout; 
  the 
  feet 
  arc 
  

   wide 
  and 
  stout, 
  of 
  the 
  usual 
  form 
  ; 
  the 
  ventral 
  cirri 
  project 
  beyond 
  the 
  

   feet, 
  are 
  bluntly 
  rounded 
  at 
  apex, 
  and 
  have 
  cylindrical 
  or 
  slightly 
  flat- 
  

   tened 
  basal 
  articles 
  as 
  long 
  as 
  themselves; 
  on 
  the 
  middle 
  segments 
  the 
  

   dorsal 
  cirri 
  are 
  relatively 
  a 
  little 
  longer; 
  the 
  ventral 
  cirri 
  wider 
  at 
  apex; 
  

   no 
  change 
  on 
  the 
  posterior 
  segments, 
  save 
  a 
  slight 
  decrease 
  in 
  size. 
  

   The 
  anal 
  cirri 
  (tig. 
  G) 
  are 
  long, 
  stout, 
  usually 
  closely 
  applied 
  to 
  each 
  other, 
  

   outer 
  margin 
  couvex, 
  inner 
  margin 
  straight, 
  or 
  nearly 
  so; 
  on 
  some 
  spec- 
  

   imens 
  they 
  are 
  cylindrical 
  to 
  near 
  the 
  apex 
  and 
  then 
  taper 
  rapidly. 
  

  

  There 
  is 
  a 
  gradual 
  diminution 
  in 
  width 
  along 
  the 
  posterior 
  half; 
  also 
  

   along 
  a 
  few 
  of 
  the 
  anterior 
  segments. 
  The 
  body 
  is 
  convex 
  above, 
  with 
  

   a 
  narrow 
  depressed 
  area 
  along 
  the 
  sides 
  of 
  each 
  segment; 
  flattened 
  below, 
  

   or 
  very 
  slightly 
  convex. 
  

  

  The 
  general 
  color 
  is 
  yellowish-white, 
  with 
  a 
  narrow 
  median 
  and 
  wide 
  

   lateral 
  bands 
  of 
  dark 
  brown. 
  

  

  This 
  species 
  is 
  readily 
  distinguished 
  from 
  any 
  previously 
  described 
  

   from 
  our 
  coast 
  by 
  its 
  loug 
  tentacular 
  cirri 
  and 
  brown 
  bauds. 
  Low-water 
  

   and 
  shallow 
  dredging.s; 
  sandy 
  mud 
  and 
  shells. 
  Not 
  uncommon. 
  

  

  MYSTIDES 
  ThSel* 
  

  

  Mystides 
  viridis 
  n. 
  sjy. 
  

  

  (Pl. 
  I, 
  Figs. 
  10, 
  11, 
  13; 
  Pi. 
  II, 
  Fig. 
  12.) 
  

  

  In 
  living 
  specimens, 
  in 
  extension, 
  the 
  head 
  is 
  longer 
  than 
  shown 
  in 
  

   the 
  figure 
  (fig. 
  10) 
  and 
  the 
  sides 
  lose 
  their 
  curvatures 
  in 
  great 
  part; 
  at 
  

  

  * 
  Langerhans 
  gives 
  the 
  following 
  diagnosis 
  of 
  this 
  genus: 
  Phyllodocidce 
  with 
  four 
  

   antennce; 
  three 
  pairs 
  of 
  tentacular 
  cirri; 
  one 
  bundle 
  of 
  seta'. 
  (Zeitschriftfiir 
  wissenschaft- 
  

   liche 
  Zoologie, 
  Vol. 
  iii, 
  p. 
  310, 
  1879.) 
  We 
  have 
  not 
  seen 
  The"el's 
  paper. 
  

  

  