﻿

  FROM 
  MOUNT 
  GAMBLER, 
  SOUTH 
  AUSTRALIA. 
  271 
  

  

  like 
  Lepralia 
  Pallasiana. 
  The 
  oral 
  aperture 
  is 
  0*18 
  to 
  0-22 
  millim. 
  

   wide. 
  

  

  46. 
  Monoporella 
  hebetata, 
  sp. 
  nov. 
  Plate 
  VII. 
  fig. 
  11. 
  

   Zoarium 
  in 
  Lepralia-form. 
  Zooecia 
  small, 
  broad, 
  contracted 
  to- 
  

   wards 
  the 
  base 
  ; 
  surface 
  with 
  few 
  large 
  pores 
  (which 
  may 
  be 
  den- 
  

   ticulate). 
  Two 
  avicularia 
  on 
  a 
  level 
  with 
  the 
  oral 
  aperture 
  Oral 
  

   aperture 
  nearly 
  semicircular, 
  contracted 
  below, 
  proximal 
  edge 
  

   straight. 
  The 
  proximal 
  edge 
  of 
  the 
  aperture 
  is 
  about 
  0*12 
  millim. 
  

   wide, 
  while 
  the 
  widest 
  part 
  is 
  0*14 
  millim. 
  

  

  On 
  the 
  under 
  surface 
  there 
  are 
  projections, 
  which 
  in 
  some 
  cases 
  

   are 
  perforated 
  ; 
  and 
  perhaps 
  it 
  was 
  attached 
  by 
  tubular 
  radicles. 
  

  

  47. 
  Monoporella 
  oblonga, 
  sp. 
  nov. 
  Plate 
  VII. 
  fig. 
  9. 
  

  

  Zoarium 
  probably 
  in 
  Hemeschara-st&dmm. 
  Zooecia 
  elongate, 
  with 
  

   nearly 
  parallel 
  sides, 
  distinct, 
  divided 
  by 
  a 
  thin 
  raised 
  line 
  ; 
  a 
  little 
  

   below 
  the 
  aperture 
  on 
  each 
  side 
  close 
  to 
  the 
  border 
  a 
  small 
  rounded 
  

   avicularium 
  directed 
  outwards 
  ; 
  oral 
  aperture 
  large, 
  about 
  the 
  

   width 
  of 
  the 
  zocecium, 
  rounded 
  at 
  the 
  distal 
  end, 
  rather 
  straight 
  

   below, 
  with 
  the 
  sides 
  also 
  straight, 
  but 
  with 
  the 
  corners 
  rounded 
  off. 
  

   Oral 
  aperture 
  031 
  millim. 
  wide, 
  0-28 
  millim. 
  long. 
  

  

  This 
  may 
  be 
  related 
  to 
  Lepralia 
  rubens, 
  Stimpson, 
  

  

  48. 
  Porella 
  conchota, 
  Busk. 
  

  

  Lepralia 
  concinna, 
  Busk, 
  B. 
  M. 
  Cat. 
  ii. 
  p. 
  67, 
  pi. 
  xcix. 
  

  

  Porella 
  concinna, 
  Hincks, 
  Brit. 
  Mar. 
  Polyz. 
  p. 
  323, 
  pi. 
  xlvi. 
  ; 
  

   Hincks, 
  " 
  Coll. 
  of 
  Polyz. 
  from 
  Bass's 
  Straits," 
  p. 
  16, 
  Proc. 
  Lit. 
  & 
  Phil. 
  

   Soc. 
  Liverpool, 
  1881. 
  

  

  Zoarium 
  in 
  Eschar 
  a 
  -form. 
  Zooecia 
  punctured 
  over 
  the 
  entire 
  

   surface. 
  Oral 
  aperture 
  0*14 
  millim. 
  wide. 
  

  

  I 
  have 
  this 
  species 
  from 
  Rapallo 
  (Italy) 
  also 
  in 
  Eschara-form. 
  

  

  Loc. 
  Living 
  : 
  Northern 
  seas, 
  Mediterranean, 
  Bass's 
  Straits 
  

   (ZT.). 
  Fossil 
  : 
  Postpliocene. 
  

  

  49. 
  Smittia 
  Tatei, 
  T. 
  Woods. 
  Plate 
  VII. 
  fig. 
  10 
  ; 
  pi. 
  VIII. 
  fig. 
  21. 
  

  

  Eschara 
  Tatei, 
  T. 
  Woods, 
  " 
  On 
  some 
  Tert. 
  Austr. 
  Polyz." 
  Roy. 
  Soc. 
  

   N. 
  S. 
  Wales, 
  1876, 
  p. 
  3, 
  fig. 
  xv. 
  

  

  Eschara 
  porrecta, 
  T, 
  Woods, 
  loc. 
  cit. 
  p. 
  1. 
  figs. 
  2, 
  3. 
  

   Smittia 
  Tatei, 
  Waters, 
  loc. 
  cit. 
  p. 
  337, 
  pi. 
  xvii. 
  fig. 
  65. 
  

  

  This 
  is 
  a 
  common 
  but 
  rather 
  variable 
  species. 
  The 
  zoaria 
  are 
  

   sometimes 
  very 
  small, 
  with 
  only 
  a 
  few 
  zooecia 
  in 
  a 
  series 
  ; 
  other 
  

   specimens 
  are 
  foliaceous. 
  The 
  long 
  acute 
  avicularium 
  is 
  sometimes 
  

   found 
  in 
  every 
  zocecium, 
  while 
  in 
  other 
  cases 
  it 
  is 
  but 
  seldom 
  met 
  

   with. 
  

  

  Eschara 
  parallela, 
  Reuss, 
  from 
  the 
  Italian 
  Miocene, 
  much 
  resem- 
  

   bles 
  this; 
  but 
  the 
  suboral 
  avicularium 
  is 
  absent. 
  

  

  Athough 
  this 
  is 
  a 
  common 
  species, 
  I 
  have 
  only 
  seen 
  a 
  single 
  

   ovicell, 
  which 
  is 
  globose, 
  not 
  very 
  much 
  raised. 
  This 
  species 
  would 
  

   seem 
  to 
  be 
  closely 
  related 
  to 
  S. 
  Lanclsborovii. 
  

  

  