﻿20 
  rROCEEDINOS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  ___ 
  . 
  __ 
  ,: 
  

  

  canals 
  are 
  very 
  short 
  from 
  the 
  margin 
  and 
  their 
  attachment 
  to 
  the 
  

   latter, 
  less 
  than 
  twice 
  as 
  long 
  as 
  broad. 
  Their 
  margins 
  are 
  very 
  

   irregular, 
  jagged, 
  or 
  with 
  broad, 
  dendritic 
  diverticula, 
  the 
  exact 
  out- 
  

   lines 
  varying 
  from 
  canal 
  to 
  canal. 
  The 
  margin 
  of 
  the 
  circular 
  canal 
  

   is 
  strongly 
  jagged. 
  

  

  Tentacles. 
  — 
  The 
  most 
  distinctive 
  character 
  of 
  the 
  species 
  is 
  afforded 
  

   by 
  the 
  ver}'- 
  large 
  number 
  of 
  tentacles 
  and 
  by 
  the 
  form 
  of 
  their 
  basal 
  

   bulbs. 
  In 
  the 
  smaller 
  specimens 
  there 
  are 
  34 
  and 
  41 
  tentacles 
  in 
  two 
  

   successive 
  quadrants, 
  and 
  the 
  total 
  is 
  about 
  150. 
  In 
  one 
  of 
  the 
  large 
  

   ones 
  the 
  number 
  of 
  interradials 
  to 
  the 
  quadrant 
  is 
  43, 
  39, 
  34, 
  41; 
  the 
  

   total 
  about 
  155. 
  And 
  even 
  these 
  large 
  numbers 
  are 
  not, 
  it 
  seems, 
  

   the 
  final 
  ones, 
  for 
  there 
  are 
  many 
  young 
  tentacles 
  in 
  various 
  stages 
  

   of 
  development, 
  besides 
  minute 
  knobs 
  which 
  have 
  just 
  commenced 
  

   their 
  growtli. 
  As 
  is 
  usual 
  in 
  Pandeids 
  with 
  large 
  numbers 
  of 
  ten- 
  

   tacles, 
  these 
  organs 
  seem 
  to 
  be 
  in 
  two 
  or 
  more 
  rows. 
  But 
  examination 
  

   shows 
  that 
  this 
  is 
  only 
  apparent, 
  being 
  due 
  to 
  the 
  outward 
  gi-owth 
  of 
  

   the 
  bases 
  of 
  the 
  older 
  tentacles 
  (pi. 
  1, 
  fig. 
  6). 
  

  

  In 
  C. 
  vesicaria 
  the 
  largest 
  number 
  of 
  tentacles, 
  old 
  and 
  young, 
  

   which 
  has 
  ever 
  been 
  recorded, 
  is 
  only 
  48, 
  and 
  the 
  numerous 
  records 
  

   of 
  that 
  species 
  show 
  that 
  even 
  this 
  number 
  is 
  seldom 
  attained. 
  

  

  The 
  basal 
  bulbs 
  are 
  of 
  a 
  characteristic 
  outline 
  (pi. 
  1, 
  fig. 
  6), 
  laterally 
  

   flattened, 
  triangular, 
  and 
  extending 
  outward 
  over 
  the 
  exumbrella. 
  

   The 
  bulbs 
  of 
  vesicaria 
  are 
  likewise 
  triangular, 
  but 
  while 
  in 
  the 
  

   latter 
  species 
  the 
  axis 
  of 
  the 
  filament 
  lies 
  at 
  the 
  inner 
  face 
  of 
  the 
  

   triangle, 
  and 
  the 
  outward 
  growth 
  is 
  in 
  the 
  form 
  of 
  a 
  spur, 
  in 
  multi- 
  

   cirrata 
  the 
  axis 
  is 
  opposite 
  the 
  center 
  of 
  the 
  base 
  of 
  the 
  triangle. 
  

  

  Color. 
  — 
  In 
  the 
  preserved 
  condition, 
  manubrium 
  and 
  tentacles 
  are 
  

   pale 
  brownish-yellow. 
  

  

  The 
  two 
  young 
  specimens 
  are 
  interesting 
  because 
  they 
  show 
  that 
  

   this 
  species 
  is 
  readily 
  distinguished 
  from 
  vesicaria 
  at 
  an 
  early 
  age. 
  

   The 
  gelatinous 
  dome, 
  contracted 
  in 
  the 
  adult, 
  is 
  well 
  preserved 
  here. 
  

   The 
  other 
  differences 
  between 
  them 
  and 
  the 
  latter 
  are 
  all 
  such 
  as 
  

   would 
  be 
  expected; 
  that 
  is, 
  fewer 
  tentacles 
  and 
  less 
  prominent 
  gonads. 
  

   The 
  manubrium 
  is 
  proportionately 
  shorter, 
  and 
  its 
  perradial 
  attach- 
  

   ments 
  to 
  the 
  subumbrella 
  do 
  not 
  extend 
  so 
  far. 
  The 
  gonad 
  folds 
  

   are 
  very 
  short, 
  occupying 
  only 
  a 
  narrow 
  zone 
  at 
  the 
  upper 
  part 
  of 
  

   each 
  interradial 
  area, 
  and 
  the 
  lips 
  are 
  simpler. 
  On 
  the 
  other 
  hand, 
  

   the 
  margins 
  of 
  the 
  circular 
  and 
  radial 
  canals 
  are 
  nearly 
  as 
  iiTegular 
  

   and 
  as 
  complexly 
  lobed 
  as 
  they 
  are 
  in 
  the 
  adult. 
  

  

  The 
  marginal 
  organs 
  consist 
  of 
  tentacles 
  in 
  every 
  stage 
  of 
  develop- 
  

   ment. 
  The 
  numbers 
  of 
  interradials 
  of 
  all 
  sizes 
  to 
  the 
  quadrant 
  in 
  

   one 
  specimen 
  are 
  25, 
  26, 
  21, 
  20, 
  a 
  total 
  of 
  92, 
  and 
  in 
  the 
  other 
  24, 
  25, 
  

   24, 
  28, 
  the 
  total 
  being 
  101. 
  Of 
  these, 
  41 
  in 
  the 
  former 
  and 
  46 
  in 
  

   the 
  latter 
  are 
  minute 
  knobs; 
  and 
  every 
  stage 
  is 
  present 
  connecting 
  

   these 
  with 
  large 
  tentacles. 
  

  

  