﻿NO. 
  Ifl40. 
  PACIFIC 
  MEDUSAE 
  A 
  YD 
  8TPH0N0PH0RAE—BI0EL0W. 
  9 
  

  

  pcdiinclp, 
  long 
  manubrium, 
  the 
  fact 
  that 
  the 
  gelatinous 
  substance, 
  

   thick 
  aborally, 
  grows 
  thinner 
  toward 
  the 
  margin; 
  the 
  large 
  number 
  of 
  

   tentacles; 
  purel}^ 
  interradial 
  gonads; 
  development 
  of 
  the 
  planulae 
  

   attached 
  to 
  the 
  walls 
  of 
  the 
  manubrium; 
  and 
  dense 
  pigmentation; 
  

   all 
  of 
  which 
  are 
  shown 
  by 
  our 
  specimen. 
  It 
  would 
  be 
  interesting 
  to 
  

   know 
  the 
  true 
  relationship 
  between 
  B. 
  swperciliaris 
  and 
  the 
  other 
  

   Bougainvillea 
  from 
  the 
  northwestern 
  Pacific, 
  B. 
  lougainvillei 
  Brandt. 
  

   Mayer 
  (1910) 
  unites 
  them; 
  but 
  Ilartlaub 
  (1911) 
  believes 
  that 
  they 
  

   are 
  distinct, 
  the 
  latter, 
  according 
  to 
  him, 
  being 
  more 
  nearly 
  related 
  to 
  

   B. 
  hritannica. 
  Without 
  access 
  to 
  specimens 
  of 
  the 
  hougainvillei 
  

   type, 
  it 
  is 
  impossible 
  to 
  settle 
  the 
  question; 
  but 
  I 
  may 
  point 
  out 
  that 
  

   hougainvillei 
  resembles 
  swperciliaris 
  in 
  the 
  presence 
  of 
  a 
  short 
  pedun- 
  

   cle; 
  that 
  its 
  manubrium 
  is 
  no 
  shorter 
  than 
  I 
  have 
  often 
  seen 
  it 
  in 
  

   superciliaris 
  of 
  the 
  same 
  size 
  ; 
  and 
  that 
  so 
  far 
  as 
  general 
  form 
  is 
  con- 
  

   cerned 
  it 
  agrees 
  equally 
  well 
  with 
  either. 
  Hartlaub 
  (1911) 
  mentions 
  

   as 
  a 
  point 
  of 
  resemblance 
  to 
  hritannica 
  that 
  the 
  ocelli 
  in 
  hougainvillei 
  

   lie 
  on 
  the 
  free 
  tentacles 
  at 
  their 
  bases; 
  but 
  the 
  same 
  is 
  true 
  of 
  super- 
  

   ciliaris, 
  as 
  is 
  clearly 
  shown 
  in 
  L. 
  Agassi2i's 
  figures 
  (1849). 
  

  

  The 
  one 
  peculiar 
  feature 
  of 
  hougainvillei 
  is 
  the 
  presence 
  of 
  "sehr 
  

   feinen 
  Borstchen" 
  on 
  the 
  exumbrella 
  (Brandt, 
  1838, 
  p. 
  393). 
  But 
  

   these 
  spmes 
  or 
  hairs 
  suggest 
  the 
  spines 
  of 
  radiolarians, 
  with 
  which 
  

   medusae 
  are 
  often 
  clothed. 
  On 
  the 
  whole, 
  then, 
  I 
  am 
  inclined 
  to 
  

   believe 
  that 
  hougainvillei 
  is 
  identical 
  with 
  superciliaris. 
  It 
  has 
  been 
  

   recorded 
  by 
  Murbach 
  and 
  Shearer 
  (1903), 
  but 
  the 
  identity 
  of 
  their 
  

   specimen 
  (not 
  figured) 
  is 
  uncertain. 
  B. 
  mertensi 
  A. 
  Agassiz 
  is 
  prob- 
  

   ably 
  a 
  synonym 
  of 
  hougainvillei, 
  but 
  the 
  original 
  specimens 
  of 
  mer- 
  

   tensi 
  in 
  the 
  collection 
  of 
  the 
  Museum 
  of 
  Comparative 
  Zoology 
  are 
  

   distorted 
  past 
  hope 
  of 
  recognition. 
  

  

  BOUGAINVn-LEA 
  SUPERCILIARIS 
  (Gould) 
  L. 
  Agassiz. 
  

   Eippocrene 
  superciliaris 
  Gould, 
  1841, 
  p. 
  348. 
  — 
  L. 
  Agassiz, 
  1849, 
  p. 
  250, 
  pis. 
  1-3. 
  

   (For 
  further 
  synonymy, 
  see 
  Mayer, 
  1910, 
  p. 
  162, 
  and 
  Hartlnnb. 
  1911, 
  p. 
  171.) 
  

  

  Attu 
  Island, 
  June 
  11; 
  1 
  specimen, 
  12 
  mm. 
  high 
  by 
  10 
  mm. 
  in 
  

   diameter. 
  The 
  example 
  was 
  obviously 
  much 
  larger 
  in 
  life, 
  and 
  it 
  

   appears 
  to 
  be 
  the 
  largest 
  representative 
  of 
  the 
  species 
  yet 
  recorded. 
  

   B. 
  superciliaris 
  has 
  been 
  so 
  well 
  described 
  and 
  figured 
  by 
  L. 
  Agassiz 
  

   (1849), 
  Mayer 
  (1910), 
  and 
  Hartlaub 
  (1911) 
  that 
  no 
  account 
  is 
  called 
  

   for, 
  further 
  than 
  to 
  point 
  out 
  that 
  our 
  specimen 
  shows 
  the 
  specific 
  

   characters 
  in 
  a 
  typical 
  way. 
  The 
  peduncle 
  is 
  short 
  and 
  broad, 
  and, 
  

   corresponding 
  with 
  the 
  large 
  size, 
  the 
  interradial 
  sides 
  of 
  the 
  manu- 
  

   brium 
  are 
  covered 
  with, 
  planulae, 
  but 
  none 
  are 
  attached 
  along 
  four 
  

   narrow 
  perradial 
  Imes. 
  The 
  manubrium 
  itself 
  is 
  large, 
  and 
  hangs 
  to 
  

   about 
  the 
  mid 
  height 
  of 
  the 
  bell. 
  The 
  numbers 
  of 
  marginal 
  ten- 
  

   tacles 
  to 
  the 
  bundle 
  are 
  16, 
  18, 
  15, 
  15, 
  18 
  being 
  the 
  greatest 
  number 
  

   yet 
  recorded. 
  The 
  branching 
  of 
  the 
  oral 
  tentacles 
  is 
  more 
  complex 
  

  

  