﻿art. 
  25 
  GENERA 
  SIPHOGENERINA 
  AND 
  PAVONINA 
  CUSHMAN 
  17 
  

  

  ing 
  rapidly 
  broader, 
  then 
  contracted 
  where 
  the 
  uniserial 
  portion 
  

   begins; 
  sutures 
  hardly 
  depressed, 
  distinct, 
  often 
  of 
  clear 
  material, 
  

   appearing 
  darker 
  than 
  the 
  rest 
  of 
  the 
  test; 
  aperture 
  rounded 
  or 
  

   elliptical, 
  without 
  a 
  distinct 
  neck 
  but 
  with 
  a 
  slight 
  rounded 
  lip; 
  

   microspheric 
  form 
  usually 
  the 
  larger. 
  

  

  Length, 
  0.75-1 
  mm. 
  

  

  Distribution. 
  — 
  The 
  species 
  was 
  originally 
  described 
  by 
  Brady 
  

   from 
  a 
  dredging 
  of 
  the 
  Challenger 
  in 
  345 
  fathoms 
  on 
  the 
  Hyalonema 
  

   ground 
  off 
  southeastern 
  Japan, 
  and 
  was 
  apparently 
  not 
  obtained 
  

   elsewhere 
  by 
  the 
  Challenger. 
  Egger 
  records 
  it 
  from 
  off 
  western 
  

   Australia 
  but 
  his 
  figures 
  are 
  not 
  at 
  all 
  characteristic, 
  and 
  may 
  not 
  rep- 
  

   resent 
  the 
  species. 
  Millett's 
  note 
  on 
  his 
  Malay 
  collections 
  is 
  as 
  fol- 
  

   lows: 
  "Of 
  this 
  rare 
  form 
  a 
  few 
  poor 
  examples 
  occur 
  at 
  several 
  sta- 
  

   tions." 
  He 
  does 
  not 
  figure 
  them. 
  Chapman 
  records 
  a 
  specimen 
  

   from 
  off 
  Funafuti 
  in 
  2,400 
  fathoms. 
  I 
  had 
  excellent 
  material 
  from 
  

   stations 
  off 
  southern 
  Japan 
  and 
  the 
  Philippines. 
  

  

  In 
  the 
  fossil 
  state 
  it 
  is 
  recorded 
  by 
  Schubert 
  from 
  the 
  Bismarck 
  

   Archipelago, 
  and 
  by 
  Heron-Allen 
  from 
  the 
  Antartic. 
  Egger 
  records 
  

   it 
  from 
  the 
  Cretaceous 
  of 
  Central 
  Europe, 
  but 
  an 
  examination 
  of 
  the 
  

   figures 
  he 
  gives 
  shows 
  little 
  in 
  common 
  with 
  the 
  Pacific 
  material, 
  

   and 
  the 
  Cretaceous 
  material 
  is 
  something 
  else. 
  

  

  The 
  very 
  restricted 
  records 
  for 
  this 
  species 
  seem 
  to 
  show 
  that 
  its 
  

   main 
  range 
  is 
  from 
  southern 
  Japan 
  to 
  the 
  Philippines, 
  and 
  southward. 
  

   Most 
  of 
  the 
  records 
  are 
  in 
  considerable 
  depths, 
  and 
  it 
  does 
  not 
  belong 
  

   to 
  the 
  ordinary 
  "coral-reef 
  fauna," 
  but 
  probably 
  is 
  more 
  widely 
  

   distributed 
  in 
  the 
  Indo-Pacific 
  than 
  the 
  few 
  records 
  indicate. 
  

  

  SIPHOGENERINA 
  BIFRONS 
  (H. 
  B. 
  Brady), 
  var. 
  SYDNEYENSIS 
  (Goddard 
  and 
  Jensen) 
  

  

  Plate 
  3, 
  figs. 
  10a, 
  b 
  

  

  Sagrina 
  sydneyensis 
  Goddard 
  and 
  Jensen, 
  Proc. 
  Linn. 
  Soc. 
  New 
  South 
  

   Wales, 
  vol. 
  32, 
  1907, 
  p. 
  304, 
  pi. 
  6, 
  figs. 
  4a, 
  b. 
  

  

  The 
  description 
  given 
  by 
  the 
  authors 
  is 
  as 
  follows: 
  

  

  This 
  species 
  has 
  a 
  straight 
  cylindrical 
  test. 
  The 
  commencement 
  is 
  a 
  large 
  

   hemispherical 
  chamber, 
  which, 
  however, 
  contains 
  one 
  septum, 
  indicating 
  a 
  uvig- 
  

   erine 
  commencement. 
  The 
  subsequent 
  chambers 
  are 
  short 
  and 
  cylindrical, 
  

   and 
  do 
  not 
  at 
  first 
  increase 
  in 
  diameter. 
  Subsequently 
  they 
  increase 
  slowly 
  in 
  

   diameter 
  as 
  well 
  as 
  in 
  length 
  (fig. 
  4a; 
  pi. 
  3, 
  fig. 
  10a). 
  The 
  surface 
  of 
  each 
  cham- 
  

   ber 
  is 
  ornamented 
  with 
  minute 
  spines, 
  and 
  two 
  or 
  three 
  extraordinarily 
  large 
  

   oval 
  pores. 
  The 
  latter 
  are 
  irregularly 
  distributed, 
  but 
  are 
  chiefly 
  found 
  toward 
  

   the 
  proximal 
  end 
  of 
  each 
  segment. 
  Size: 
  Length, 
  0.57 
  mm. 
  

  

  From 
  the 
  figure 
  given 
  by 
  the 
  authors 
  this 
  seems 
  very 
  certainly 
  a 
  

   varietal 
  form 
  of 
  S. 
  bifrons 
  (H. 
  B. 
  Brady). 
  

  

  The 
  specimens 
  were 
  from 
  300 
  fathoms, 
  27.5 
  miles 
  east 
  of 
  Sydney 
  

   Heads, 
  New 
  South 
  Wales, 
  dredged 
  by 
  C. 
  Hedley. 
  

  

  