﻿740 
  REPORT 
  OF 
  COMMISSIONER 
  OP 
  PISH 
  AND 
  FISHERIES. 
  [34] 
  

  

  Along 
  the 
  branchiatecl 
  segments 
  the 
  body 
  is 
  slightly 
  convex 
  dorsally 
  

   and 
  laterally 
  ; 
  flat 
  below 
  ; 
  farther 
  back 
  somewhat 
  convex 
  both 
  above 
  

   aud 
  below, 
  but 
  never 
  round. 
  

  

  The 
  anal 
  segment 
  is 
  obliquely 
  truncated 
  from 
  above 
  downward, 
  and 
  

   carries 
  three 
  delicate 
  anal 
  cirri 
  — 
  one 
  medio-ventral, 
  two 
  latero-ventral. 
  

  

  The 
  width 
  of 
  the 
  anterior 
  half 
  of 
  the 
  body 
  is 
  nearly 
  uniform 
  ; 
  along 
  

   the 
  posterior 
  half 
  it 
  tapers 
  slightly, 
  so 
  that 
  the 
  posterior 
  segments 
  are 
  

   about 
  one-half 
  as 
  wide 
  as 
  the 
  anterior. 
  

  

  Behind 
  the 
  branchiae 
  in 
  many 
  specimens 
  the 
  body 
  was 
  filled 
  with 
  large 
  

   irregularly 
  polygonal 
  eggs, 
  clear 
  white, 
  with 
  distinct 
  nucleus. 
  General 
  

   color 
  some 
  shade 
  of 
  green, 
  usually 
  light 
  green; 
  branchiae 
  green, 
  with 
  

   red 
  center 
  ; 
  setae 
  gleaming 
  white. 
  

  

  Length, 
  5-6 
  mm 
  . 
  

  

  Width, 
  0.4-0.5 
  mm 
  . 
  

  

  Common 
  in 
  mud 
  and 
  sandy 
  mud 
  ; 
  31-2 
  fathoms. 
  

  

  Aricidea 
  Nolani,* 
  n. 
  sp. 
  

  

  (Pl. 
  VIII, 
  Figs. 
  97, 
  98.) 
  

  

  With 
  the 
  last 
  form 
  we 
  also 
  found 
  another 
  species 
  of 
  this 
  genus. 
  The 
  

   head 
  (fig. 
  97) 
  is 
  a 
  little 
  longer 
  than 
  its 
  greatest 
  width, 
  bluntly 
  rounded 
  

   in 
  front, 
  but 
  with 
  the 
  apex 
  not 
  so 
  wide 
  as 
  in 
  the 
  preceding 
  species; 
  an- 
  

   tenna 
  short, 
  stout, 
  conical 
  or 
  fusiform 
  ; 
  eyes 
  situated 
  as 
  iu 
  the 
  last 
  spe- 
  

   cies, 
  but 
  larger. 
  

  

  Branchiae 
  begin 
  on 
  the 
  fourth 
  setigerous 
  segment, 
  13-20 
  pairs, 
  over- 
  

   lapping 
  along 
  the 
  middle 
  line 
  (fig. 
  98). 
  Dorsal 
  cirri, 
  on 
  segments 
  an- 
  

   terior 
  to 
  the 
  branchiae, 
  short, 
  conical; 
  on 
  branchiated 
  segments, 
  much 
  

   louger, 
  swollen 
  near 
  the 
  base; 
  behind 
  the 
  branchiae, 
  delicate, 
  conical, 
  

   increasing 
  in 
  length, 
  and 
  becoming 
  filiform 
  on 
  the 
  posterior 
  segments. 
  

  

  There 
  are 
  no 
  ventral 
  cirri. 
  The 
  setae 
  are 
  much 
  as 
  in 
  the 
  preceding 
  

   species, 
  but 
  on 
  a 
  number 
  of 
  the 
  posterior 
  ventral 
  rami 
  the 
  upper 
  setae 
  

   are 
  much 
  elougated. 
  

  

  The 
  body 
  in 
  front 
  is 
  somewhat 
  quadrangular, 
  being 
  flat, 
  or 
  even 
  

   slightly 
  concave 
  above, 
  a 
  trifle 
  convex 
  below 
  ; 
  behind 
  the 
  branchiae, 
  

   pretty 
  evenly 
  rounded. 
  

  

  Anal 
  segment 
  aud 
  cirri 
  as 
  in 
  last 
  species. 
  The 
  head 
  and 
  body 
  con- 
  

   tained 
  numerous 
  oval, 
  gleaming, 
  green 
  granules. 
  

  

  The 
  only 
  sexual 
  form 
  taken 
  was 
  a 
  female, 
  having 
  four 
  eggs 
  in 
  each 
  

   segment 
  back 
  of 
  the 
  branchiae, 
  two 
  on 
  each 
  side. 
  These 
  were 
  large, 
  

   spherical, 
  completely 
  occupying 
  the 
  lateral 
  field, 
  not 
  in 
  contact, 
  white. 
  

  

  General 
  color 
  green, 
  usually 
  dark, 
  with 
  scattered 
  spots 
  of 
  reddish- 
  

   brown 
  on 
  the 
  head 
  and 
  anterior 
  segments. 
  

  

  Length, 
  7 
  mm 
  - 
  

  

  Width, 
  3 
  mm 
  - 
  

  

  * 
  After 
  Mr. 
  Nolan, 
  of 
  New 
  York 
  City, 
  a 
  gentleman 
  who 
  was 
  of 
  great 
  service 
  to 
  us 
  in 
  

   collecting. 
  

  

  