﻿PROM 
  MOUNT 
  GAM 
  BIER, 
  SOUTH 
  AUSTRALIA. 
  265 
  

  

  third) 
  than 
  in 
  the 
  Australian 
  fossil 
  ; 
  but 
  the 
  8ize 
  of 
  the 
  aperture 
  is 
  

   about 
  the 
  same, 
  viz. 
  about 
  0*0 
  7-0*08 
  millim. 
  wide. 
  Avicularia 
  are 
  

   only 
  known 
  from 
  Maestricht 
  ; 
  and 
  possibly 
  this 
  species 
  should 
  be 
  

   separated 
  on 
  that 
  account. 
  

  

  Log. 
  Fossil 
  : 
  Cretaceous, 
  Maestricht, 
  Riigen 
  ; 
  Miocene, 
  Mod- 
  

   ling 
  (Vienna), 
  Eisenstadt 
  (Hungary), 
  Mederlies 
  (Moravia), 
  Wildon 
  

   (Styria), 
  Yal 
  di 
  Lonte 
  (A. 
  W. 
  W.) 
  ; 
  Pliocene, 
  Cor. 
  Crag, 
  Castrocaro 
  

   (Italy), 
  in 
  the 
  Helvetian, 
  Tortonian, 
  Zanclian, 
  and 
  Saharian 
  of 
  

   Eeggio 
  (Calabria, 
  Seguenza) 
  ; 
  Bruccoli* 
  (Sicily). 
  Living 
  : 
  Capri, 
  from 
  

   the 
  coral 
  fisheries 
  (A. 
  W. 
  W. 
  coll.), 
  225 
  metres. 
  

  

  23. 
  Steganoporella 
  patula, 
  Waters. 
  Plate 
  IX. 
  fig. 
  31. 
  

  

  Micropora 
  patula, 
  Waters, 
  loc. 
  cit. 
  p. 
  326. 
  

  

  It 
  is 
  difficult 
  to 
  see 
  in 
  the 
  small 
  fragments 
  if 
  this 
  is 
  a 
  Steganoporella 
  

   or 
  a 
  Micropora 
  ; 
  but 
  as 
  it 
  resembles 
  in 
  many 
  respects 
  Steganoporella 
  

   magnilabris, 
  it, 
  in 
  all 
  probability, 
  should 
  be 
  united 
  to 
  that 
  genus. 
  

   It 
  diners 
  from 
  S. 
  magnilabris 
  in 
  having 
  the 
  aperture 
  close 
  up 
  to 
  the 
  

   distal 
  end 
  : 
  and 
  the 
  aperture 
  only 
  occupies 
  a 
  quarter 
  of 
  the 
  zooecium, 
  

   while 
  in 
  S. 
  magnilabris 
  it 
  covers 
  nearly 
  one 
  half. 
  Aperture 
  0*26- 
  

   0-31 
  millim. 
  wide. 
  

  

  24. 
  Steganoporella 
  magnilabris, 
  Busk. 
  

  

  Steganoporella 
  elegans, 
  Smitt, 
  Ploridan 
  Bryozoa, 
  p. 
  15, 
  pi. 
  iv. 
  

   figs. 
  96-101. 
  

  

  Membranipora 
  magnilabris, 
  Busk, 
  Mar. 
  Polyz. 
  p. 
  62, 
  pi. 
  lxv. 
  fig. 
  4. 
  

  

  The 
  Mount-Gambier 
  specimen 
  is 
  only 
  a 
  fragment, 
  and 
  was 
  only 
  

   determined 
  by 
  means 
  of 
  comparison 
  with 
  the 
  well-preserved 
  speci- 
  

   mens 
  from 
  Bairnsdale. 
  The 
  consideration 
  of 
  this 
  species 
  is 
  deferred 
  

   until 
  I 
  describe 
  the 
  Bairnsdale 
  collection. 
  

  

  25. 
  Cribrilina 
  radiata, 
  Moll 
  (non 
  d'Orb.). 
  

  

  Lepralia 
  elegantissima, 
  Seguenza, 
  "Le 
  form. 
  terz. 
  prov. 
  di 
  Eeggio," 
  

   Atti 
  Beale 
  Accad. 
  dei 
  Lincei, 
  1879-80, 
  p. 
  83, 
  pi. 
  viii. 
  fig. 
  11. 
  

  

  Cribrilina 
  radiata, 
  Hincks, 
  Coll. 
  of 
  Polyz. 
  from 
  Bass's 
  Straits, 
  loc. 
  

   cit. 
  p. 
  10. 
  

  

  Por 
  other 
  synonyms 
  see 
  Hincks, 
  Brit. 
  Mar. 
  Polyz. 
  p. 
  185. 
  I, 
  how- 
  

   ever, 
  feel 
  doubtful 
  if 
  the 
  figure 
  and 
  description 
  of 
  Reptescharella 
  

   pygmcea, 
  d'Orbigny, 
  are 
  sufficient 
  to 
  justify 
  our 
  uniting 
  it 
  with 
  

   C. 
  radiata. 
  

  

  The 
  specimens 
  from 
  Mt. 
  Gambier 
  are 
  small, 
  without 
  avicularia 
  or 
  

   ovicells, 
  with 
  the 
  pores 
  surrounding 
  the 
  zocecia 
  well 
  marked, 
  as 
  in 
  

   Lepralia 
  Ungeri, 
  Beuss. 
  

  

  Loc. 
  Living: 
  European 
  seas, 
  Madeira, 
  Florida, 
  Bass's 
  Straits 
  

   (Hincks). 
  Fossil 
  : 
  Eocene, 
  Miocene, 
  Pliocene, 
  Postpliocene. 
  

  

  26. 
  MUCRONELLA. 
  

  

  This 
  seems 
  to 
  be 
  M. 
  microstoma, 
  Norm, 
  (see 
  Hincks, 
  Brit. 
  Mar. 
  

  

  * 
  I 
  gave 
  the 
  Arctic 
  Seas 
  as 
  a 
  locality 
  in 
  my 
  Bruccoli 
  paper; 
  but 
  this 
  seems 
  

   a 
  mistake, 
  and 
  I 
  think 
  it 
  has 
  only 
  been 
  found 
  living 
  at 
  Capri. 
  

  

  