﻿8 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol. 
  44. 
  

  

  margin. 
  And 
  were 
  they 
  in 
  several 
  rows 
  — 
  that 
  is, 
  of 
  the 
  "pacifica" 
  

   type 
  — 
  this 
  might 
  easily 
  be 
  explained 
  as 
  the 
  result 
  of 
  progressive 
  

   development. 
  So 
  far, 
  then, 
  as 
  size 
  and 
  tentacles 
  are 
  concerned, 
  

   pacijica 
  might 
  be 
  an 
  advanced 
  stage 
  of 
  nutricula, 
  but 
  the 
  position 
  

   of 
  the 
  ocelli 
  can 
  not 
  be 
  reconciled 
  with 
  this. 
  Wlien 
  1 
  first 
  exam- 
  

   ined 
  the 
  present 
  specimens 
  the 
  ocelli, 
  showing 
  clearly 
  through 
  

   the 
  tentacular 
  bulbs, 
  seemed 
  to 
  lie 
  on 
  the 
  abaxial 
  surfaces 
  of 
  the 
  

   latter, 
  and 
  it 
  was 
  only 
  when 
  the 
  tentacles 
  were 
  examined 
  in 
  side 
  

   view 
  that 
  the 
  true 
  position 
  of 
  the 
  ocelli 
  became 
  evident. 
  This, 
  

   together 
  with 
  the 
  fact 
  that 
  Maas 
  (1909) 
  has 
  given 
  only 
  an 
  abaxial 
  

   view 
  of 
  the 
  tentacles, 
  suggests 
  the 
  possibility 
  that 
  the 
  conditions 
  in 
  

   pacijica 
  might 
  be 
  explained 
  in 
  the 
  same 
  way. 
  But 
  reexamination 
  of 
  

   the 
  specimens 
  alone 
  can 
  settle 
  it. 
  The 
  Albatross 
  specimens 
  are 
  

   recorded 
  as 
  nutricula, 
  as 
  I 
  can 
  find 
  nothing 
  to 
  separate 
  them 
  from 
  

   that 
  species. 
  

  

  TURRITOPSIS 
  NUTRICULA 
  McCrady. 
  

  

  Oceania 
  {Turritopsis) 
  nutricula 
  McCrady, 
  1856, 
  p. 
  1, 
  pi. 
  4, 
  figs. 
  1-10. 
  

   Oceania 
  polycirrha 
  Kepehstein, 
  1862, 
  p. 
  26, 
  pi. 
  2, 
  figs. 
  11-13. 
  

  

  (For 
  complete 
  synonymy, 
  see 
  Mayer, 
  1910, 
  p. 
  143.) 
  

  

  Station 
  4943, 
  2 
  specimens, 
  both 
  about 
  4 
  mm. 
  high. 
  One 
  is 
  in 
  

   excellent 
  condition, 
  the 
  other 
  slightly 
  contracted. 
  

  

  The 
  better 
  specimen 
  has 
  about 
  84 
  large, 
  and 
  5 
  or 
  6 
  very 
  small 
  ten- 
  

   tacles; 
  their 
  apparent 
  location 
  in 
  two 
  rows 
  has 
  been 
  touched 
  upon. 
  

   One 
  feature 
  not 
  previously 
  emphasized 
  for 
  nutricula, 
  although 
  it 
  is 
  

   evident 
  in 
  specimens 
  from 
  Newport, 
  is 
  that 
  each 
  tentacle 
  has 
  a 
  

   distinct 
  terminal 
  dilation. 
  The 
  "Zellpolster" 
  is 
  of 
  the 
  quadrate 
  

   type 
  figured 
  by 
  Brooks 
  (1886), 
  and 
  the 
  radial 
  canals 
  within 
  it 
  are 
  

   dilated 
  but 
  slightly. 
  The 
  ova 
  (both 
  specimens 
  are 
  female) 
  cover 
  

   the 
  interradial 
  surfaces 
  of 
  the 
  manubrium, 
  leaving 
  the 
  perradii 
  bare, 
  

   but 
  no 
  planulae 
  are 
  to 
  be 
  seen. 
  

  

  Nutricula 
  has 
  been 
  described 
  so 
  often 
  and 
  so 
  fully, 
  that 
  no 
  further 
  

   discussion 
  is 
  needed 
  here. 
  For 
  excellent 
  accounts 
  and 
  figures, 
  see 
  

   Brooks 
  (1883), 
  Brooks 
  and 
  Rittenhouse 
  (1867), 
  Ma3'cr 
  (1910), 
  and 
  

   Hartlaub 
  (1911). 
  

  

  Family 
  BOUGAINVILLEID.E 
  ' 
  Gegenbaur, 
  1856. 
  

   Genus 
  BOUGAINVILLEA 
  Lesson, 
  1843. 
  

  

  The 
  collection 
  contains 
  one 
  large 
  specimen 
  of 
  Bougainvillea 
  which 
  

   I 
  can 
  not 
  distinguish 
  from 
  B. 
  swperciliaris, 
  and 
  its 
  identity 
  seems 
  

   assured 
  because 
  I 
  have 
  been 
  able 
  to 
  compare 
  it 
  with 
  excellent 
  speci- 
  

   mens 
  of 
  that 
  species 
  from 
  Labrador. 
  The 
  diagnostic 
  features 
  of 
  

   swperciliaris 
  are 
  its 
  large 
  size, 
  the 
  presence 
  of 
  a 
  short 
  gelatinous 
  

  

  »The 
  uso 
  of 
  the 
  name 
  Margelidae 
  (Plartlaub, 
  1911) 
  is 
  untenable 
  because 
  Margelis 
  is 
  a 
  synonym 
  of 
  

   Bougainvillea. 
  

  

  