﻿FROM 
  BAIRNSDALE 
  (GirPSLAtfD). 
  505 
  

  

  as 
  M. 
  loxopora, 
  Ess. 
  In 
  the 
  Bairnsdale 
  specimen 
  the 
  avicularia 
  

   above 
  the 
  aperture 
  are 
  often 
  very 
  large, 
  occupying 
  nearly 
  the 
  space 
  

   of 
  a 
  zocecium. 
  They 
  are 
  then 
  broad 
  and 
  directed 
  laterally. 
  

  

  7. 
  Stegaxoporella 
  Rozieri, 
  Aud., 
  var. 
  itcdica, 
  Hincks. 
  

  

  Steganoporella 
  Bozieri, 
  Hincks, 
  " 
  Gen. 
  Hist, 
  of 
  the 
  Mar. 
  Polyzoa," 
  

   Ann. 
  & 
  Mag. 
  Xat. 
  Hist. 
  ser. 
  5, 
  vol. 
  vi. 
  1880, 
  p. 
  379, 
  pi. 
  xvi. 
  figs. 
  1, 
  la. 
  

  

  Eschara 
  ignobilis, 
  Reuss, 
  " 
  Foram. 
  Anth. 
  & 
  Bry. 
  des 
  Septarien- 
  

   thones," 
  Denkschr. 
  Ak. 
  Wissensch. 
  Wien, 
  xxv. 
  p. 
  65, 
  pi. 
  vi. 
  fig. 
  14. 
  

  

  Vincularia 
  novce-hollandice, 
  Haswell, 
  " 
  On 
  some 
  Polyzoa 
  from 
  the 
  

   Queensland 
  Coast," 
  Proc. 
  Linn. 
  Soc. 
  N". 
  S. 
  Wales, 
  vol. 
  v. 
  pt. 
  1, 
  p. 
  41, 
  

   pi. 
  iii. 
  fig. 
  3. 
  

  

  Vincularia 
  steganoporides, 
  Goldstein. 
  Bry. 
  from 
  Marion 
  Islands, 
  

   1881, 
  p. 
  6, 
  pi. 
  ii. 
  fig. 
  5. 
  

  

  Zoarium 
  in 
  Eschar 
  a-iorm. 
  The 
  shape 
  of 
  the 
  avicularia 
  cannot 
  

   be 
  made 
  out 
  ; 
  but 
  there 
  are 
  large 
  oval 
  avicularian 
  openings 
  in 
  the 
  

   lower 
  part 
  of 
  the 
  zocecium, 
  and 
  in 
  one 
  case 
  there 
  is 
  an 
  irregular 
  

   triangular 
  opening 
  apparently 
  caused 
  by 
  the 
  coalition 
  of 
  two 
  avicu- 
  

   laria. 
  I 
  have 
  a 
  Steganoporella 
  from 
  the 
  Miocene 
  of 
  Brendola 
  (X. 
  

   Italy) 
  which 
  has 
  very 
  similar 
  cells, 
  but 
  with 
  a 
  tubercle 
  on 
  each 
  side 
  

   of 
  the 
  mouth 
  ; 
  but 
  in 
  that 
  case 
  there 
  is 
  a 
  large 
  cell 
  about 
  the 
  length 
  

   of 
  three 
  and 
  the 
  width 
  of 
  two 
  zocecia. 
  

  

  Loc. 
  Living 
  : 
  India 
  (Hincks), 
  Marion 
  Islands 
  (Gold.), 
  Holborn 
  

   Islands 
  (Hasiuell), 
  Darnley 
  Islands, 
  Torres 
  Straits 
  (in 
  my 
  coll.), 
  — 
  in 
  

   the 
  last 
  three 
  places 
  in 
  the 
  Vincularia-iorm. 
  Miocene 
  : 
  Sdllingen. 
  

  

  8. 
  Steganoporella 
  perforata, 
  MacG., 
  var. 
  clausa, 
  nov. 
  

  

  Membranipor 
  a 
  perforata, 
  MacG. 
  Zool. 
  of 
  Yict. 
  decade 
  iii. 
  p. 
  29, 
  

   pi. 
  xxv. 
  fig. 
  2 
  ; 
  decade 
  iv. 
  pi. 
  xxxvi. 
  fig. 
  3. 
  

  

  Zoarium 
  in 
  Eschara 
  -form. 
  The 
  zocecia 
  are 
  irregularly 
  hexagonal 
  

   to 
  ovate, 
  and 
  are 
  much 
  larger 
  than 
  those 
  of 
  Steganoporella 
  Rozieri, 
  

   Aud., 
  with 
  very 
  narrow 
  borders, 
  the 
  rims 
  of 
  the 
  zocecia 
  keeping 
  

   quite 
  distinct 
  although 
  close 
  together. 
  Instead 
  of 
  there 
  being 
  large 
  

   open 
  pores 
  below 
  the 
  mouth, 
  these 
  are 
  closed 
  by 
  a 
  calcareous 
  covering 
  

   the 
  centre 
  of 
  which 
  is 
  mamillated 
  and 
  perhaps 
  perforated. 
  In 
  the 
  

   Bryozoa 
  the 
  membranous 
  structures 
  are 
  often 
  replaced 
  by 
  calcareous; 
  

   and 
  this 
  would 
  seem 
  to 
  be 
  the 
  case 
  here 
  : 
  for 
  the 
  large 
  suboral 
  open- 
  

   ings 
  of 
  Steganoporella 
  are 
  usually 
  covered 
  with 
  a 
  membrane 
  as 
  in 
  

   Steganoporella 
  impressa, 
  Moll. 
  In 
  a 
  case 
  like 
  the 
  present 
  it 
  is 
  very 
  

   difficult 
  to 
  distinguish 
  Steganoporella 
  from 
  Micropora 
  ; 
  and 
  I 
  unite 
  

   this 
  with 
  MacGillivray's 
  species 
  with 
  some 
  hesitation, 
  especially 
  as 
  

   the 
  avicularia 
  and 
  ovicells 
  are 
  unknown 
  in 
  the 
  fossil. 
  

  

  I 
  have 
  recently 
  received 
  from 
  Miss 
  Jelly 
  a 
  specimen 
  of 
  Stegano- 
  

   porella 
  perforata 
  fossil 
  from 
  near 
  Napier, 
  Xew 
  Zealand. 
  Besides 
  

   the 
  large 
  pores 
  there 
  are, 
  in 
  one 
  or 
  two 
  cases, 
  pores 
  below 
  these 
  ; 
  

   and 
  then 
  the 
  zocecia 
  resemble 
  those 
  of 
  Monoporella 
  lepida, 
  Hincks. 
  

   The 
  size 
  and 
  shape 
  of 
  the 
  zocecia 
  and 
  the 
  size 
  of 
  the 
  oral 
  aperture 
  

   are 
  the 
  same 
  in 
  Steganoporella 
  perforata 
  and 
  Monoporella 
  lepida 
  ; 
  and 
  

   I 
  think 
  they 
  must 
  not 
  only 
  be 
  united 
  generically, 
  but 
  can 
  only 
  rank 
  

   as 
  specific 
  varieties. 
  

  

  Q.J.G. 
  S. 
  IS 
  T 
  o. 
  152. 
  2 
  m 
  

  

  