﻿732 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FlSH 
  AND 
  FISHERIES. 
  [26] 
  

  

  BEADA 
  Stimpson. 
  

   Brada 
  sublevis 
  Stimpson. 
  

  

  Stimpson. 
  Marine 
  Invertebrata 
  of 
  Grand 
  Manan, 
  p. 
  32. 
  1854. 
  

  

  It 
  seems 
  very 
  probable 
  that 
  this 
  species 
  will 
  be 
  found 
  to 
  be 
  the 
  same 
  

   as 
  Brada 
  granulata 
  M 
  axmgren, 
  in 
  which 
  case 
  it 
  would 
  be 
  better 
  to 
  

   retain 
  Malmgreu's 
  name, 
  as 
  Stiinpson's 
  notice 
  of 
  the 
  species 
  can 
  hardly 
  

   be 
  called 
  a 
  description. 
  

  

  Common. 
  Low 
  water 
  to 
  30 
  fathoms, 
  sand 
  and 
  sandy 
  mild. 
  

  

  Brada 
  granosa 
  Stimpson. 
  

   (Pi.. 
  V, 
  Figs. 
  72-76.) 
  

  

  Stimpson. 
  Grand 
  Manan, 
  p. 
  32. 
  1854. 
  

  

  We 
  found 
  at 
  Eastport 
  two 
  species 
  of 
  Brada, 
  which, 
  by 
  comparison 
  

   with 
  each 
  other, 
  were 
  referred 
  to 
  Stimpson's 
  species. 
  The 
  form 
  referred 
  

   to 
  granosa 
  has 
  the 
  dorsum 
  and 
  sides 
  densely 
  covered 
  with 
  long 
  1 
  , 
  coni- 
  

   cal, 
  or 
  cylindrical 
  papillae 
  (fig. 
  72), 
  which, 
  for 
  their 
  inner 
  two-thirds, 
  

   are 
  covered 
  with 
  sand, 
  closely 
  adherent. 
  In 
  each 
  dorsal 
  ramus 
  there 
  

   are 
  two 
  seta?, 
  delicate, 
  distinctly, 
  but 
  distantly 
  striate 
  (fig. 
  73). 
  In 
  the 
  

   ventral 
  rami, 
  4-G 
  much 
  stouter 
  setae 
  (figs. 
  74, 
  75), 
  which 
  may 
  be 
  more 
  or 
  

   less 
  curved 
  at 
  apex. 
  

  

  Common. 
  Low 
  water 
  to 
  30 
  fathoms, 
  sand 
  and 
  sandy 
  mud. 
  

  

  Young 
  forms 
  of 
  this 
  species, 
  taken 
  iu 
  the 
  first 
  part 
  of 
  July, 
  had 
  a 
  

   length 
  of 
  2 
  mm 
  , 
  diameter, 
  0.5 
  ,nm 
  . 
  They 
  had 
  a 
  distinct 
  head 
  (fig. 
  7G), 
  near 
  

   the 
  anterior 
  margin 
  of 
  which 
  was 
  a 
  pair 
  of 
  minute 
  red 
  eyes 
  ; 
  from 
  the 
  

   under 
  surface 
  of 
  the 
  head, 
  just 
  beneath 
  the 
  eyes, 
  arose 
  a 
  pair 
  of 
  flat- 
  

   tened, 
  oval 
  plates, 
  densely 
  ciliated 
  ; 
  these, 
  as 
  became 
  evident 
  afterwards, 
  

   were 
  the 
  tentacles. 
  From 
  a 
  membranous 
  ring, 
  back 
  of 
  the 
  head, 
  arose 
  

   one 
  or 
  two 
  pairs 
  of 
  similar 
  plates, 
  slightly 
  swollen 
  ; 
  their 
  origin 
  was 
  

   usually 
  concealed 
  by 
  the 
  projection 
  of 
  the 
  anterior 
  margin 
  of 
  the 
  first 
  

   segment, 
  so 
  that 
  they 
  seemed 
  to 
  arise 
  from 
  the 
  posterior 
  lateral 
  surface 
  

   of 
  the 
  head. 
  These 
  are 
  the 
  first 
  branchiae 
  ; 
  afterwards 
  the 
  ring, 
  from 
  

   winch 
  they 
  originate, 
  grows 
  forward, 
  completely 
  covering 
  the 
  head 
  and 
  

   carrying 
  the 
  branchiae, 
  increasing 
  in 
  number, 
  forward 
  with 
  it. 
  The 
  

   tentacles 
  at 
  first 
  are 
  simple, 
  fleshy 
  plates, 
  not 
  canaliculate. 
  

  

  Family 
  STERNASPID2E. 
  

  

  STEKNASPIS 
  Otto. 
  

   Sternaspis 
  possor 
  Stimpson. 
  

  

  Stimpson. 
  Grand 
  Manan, 
  p. 
  29, 
  fig. 
  1!>. 
  1854. 
  

   Common 
  in 
  mud 
  at 
  all 
  depths. 
  

  

  