﻿394 
  COLLECTIONS 
  FROM 
  IIELAN'ESIA. 
  

  

  21. 
  Chalina 
  monilata*. 
  (Plate 
  XLI. 
  fig. 
  Jc.) 
  

  

  Erect, 
  dichotomously 
  branched 
  ; 
  branches 
  circular 
  in 
  transverse 
  

   section, 
  round 
  at 
  the 
  ends, 
  solid, 
  4 
  to 
  6 
  millim. 
  in 
  diameter, 
  swelling 
  

   out 
  gently, 
  necklace-like, 
  about 
  every 
  8 
  or 
  10 
  millim. 
  of 
  their 
  

   length 
  ; 
  terminal 
  ones 
  35 
  to 
  85 
  millim. 
  long, 
  generally 
  broad 
  and 
  

   compressed 
  at 
  point 
  of 
  bifurcation. 
  Stem 
  short, 
  no 
  stouter 
  than 
  

   most 
  of 
  the 
  branches. 
  Surface 
  smooth, 
  glabrous. 
  Vents 
  circular, 
  

   edges 
  flush 
  with 
  the 
  surface, 
  diameter 
  about 
  2 
  millim., 
  few, 
  scattered 
  

   irregularly 
  on 
  surface. 
  Texture 
  in 
  spirit 
  compressible, 
  elastic, 
  mode- 
  

   rately 
  tough 
  ; 
  dermis 
  tough, 
  parchment-like 
  ; 
  colour 
  opaque 
  yellowish 
  

   brown. 
  

  

  Main 
  skeleton 
  irregularly 
  rectangular, 
  fibres 
  very 
  flexible, 
  pale 
  

   amber-yellow 
  ; 
  primaries 
  about 
  '042 
  millim. 
  in 
  diameter, 
  spicules 
  

   3- 
  to 
  4-serial 
  ; 
  secondaries 
  about 
  '035 
  millim. 
  in 
  diameter, 
  spicules 
  

   1- 
  to 
  3-serial 
  ; 
  primaries 
  -35 
  to 
  '53 
  millim. 
  apart 
  at 
  surface, 
  

   secondaries 
  -14 
  to 
  -35 
  millim. 
  Dermal 
  skeleton 
  — 
  a 
  wide-meshed, 
  

   irregular 
  polygonal 
  network 
  of 
  strong 
  fibre, 
  -035 
  to 
  '07 
  millim. 
  

   thick; 
  spicules 
  numerous, 
  3- 
  to 
  8-serial; 
  within 
  its 
  meshes 
  a 
  dense 
  

   and 
  regular, 
  usually 
  rectangular, 
  network 
  of 
  very 
  pale 
  horny 
  fibre, 
  

   •006 
  to 
  '042 
  millim. 
  in 
  diameter; 
  meshes 
  "05 
  to 
  ■! 
  millim. 
  in 
  diameter; 
  

   spicules 
  of 
  fibre 
  usually 
  1-serial 
  : 
  fibres 
  of 
  characters 
  transitional 
  

   between 
  these 
  two 
  kinds 
  also 
  occur. 
  Sarcode 
  very 
  pale 
  brown, 
  

   slightly 
  granular. 
  Spicules 
  smooth, 
  acerate, 
  usually 
  tapering 
  gra- 
  

   dually 
  to 
  fine 
  points, 
  size 
  -1 
  by 
  "0017 
  millim. 
  ; 
  more 
  rarely 
  tapering 
  

   slightly 
  from 
  centre 
  to 
  about 
  two 
  diameters 
  from 
  ends, 
  and 
  then 
  sud- 
  

   denly 
  to 
  sharp 
  points 
  ; 
  size 
  -OSS 
  by 
  -0021 
  millim. 
  

  

  Hah. 
  Port 
  Jackson, 
  0-5 
  fms. 
  

  

  Several 
  specimens 
  in 
  spirit, 
  the 
  largest 
  175 
  millim. 
  (7 
  inches) 
  in 
  

   height. 
  This 
  species 
  has 
  the 
  general 
  habit 
  of 
  Chalina 
  oculata, 
  

   Pallas 
  ; 
  but 
  the 
  vents 
  are 
  less 
  numerous 
  and 
  regular, 
  the 
  dermis 
  is 
  

   tough, 
  instead 
  of 
  being 
  soft 
  and 
  velvet-like, 
  and 
  the 
  branches 
  are 
  

   moniliform, 
  not 
  strictly 
  cylindrical, 
  and 
  the 
  slender 
  acerate 
  spicules 
  

   are 
  very 
  different 
  from 
  the 
  stout 
  fusiform 
  ones 
  of 
  C. 
  ocidata. 
  I 
  am 
  

   unable 
  to 
  assign 
  this 
  species 
  to 
  anj' 
  of 
  the 
  numerous 
  probable 
  Cha- 
  

   linidse 
  which 
  Lamarck 
  has 
  described 
  under 
  his 
  section 
  " 
  Masses 
  

   rameuscs," 
  &c.t 
  The 
  tough 
  outer 
  layer, 
  the 
  spiculation, 
  or 
  the 
  habit 
  

   distinguish 
  it 
  alike 
  from 
  these 
  and 
  all 
  other 
  Chalime 
  with 
  which 
  I 
  

   am 
  acquainted. 
  

  

  22. 
  Cladochalina 
  armigera. 
  

   Tuba 
  armigera, 
  Duch. 
  de 
  Fvnhressin 
  S)- 
  Michelotti. 
  

  

  Two 
  dry 
  specimens 
  and 
  one 
  in 
  spirit. 
  Agree 
  well 
  in 
  external 
  

   characters 
  with 
  the 
  original 
  figure 
  (Spong. 
  Mer 
  Caraib. 
  pi. 
  viii. 
  fig. 
  3) 
  

   and 
  in 
  the 
  characters 
  of 
  the 
  fibre, 
  except 
  that 
  the 
  spicules 
  are 
  far 
  

   more 
  abundant 
  (6 
  to 
  8 
  series 
  in 
  the 
  primary 
  and 
  proportionally 
  

  

  * 
  From 
  Lat. 
  monile 
  n 
  ecklace. 
  

   t 
  Ann. 
  Miie. 
  Hist. 
  Nat. 
  xx. 
  p. 
  44'i. 
  

  

  