﻿18 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.67 
  

  

  SIPHOGENERINA 
  BIFRONS 
  (H. 
  B. 
  Brady), 
  var. 
  STRIATULA 
  Cushman 
  

  

  Plate 
  2, 
  fig. 
  6; 
  plate 
  4, 
  figs. 
  1-3 
  

  

  Siphogenerina 
  bifrons 
  (H. 
  B. 
  Brady), 
  var. 
  strialula 
  Cushman, 
  Proc. 
  U. 
  S. 
  

   Nat. 
  Mus., 
  vol. 
  51, 
  1917, 
  p. 
  682; 
  vol. 
  56, 
  1919, 
  p. 
  620; 
  Bull. 
  100, 
  U. 
  S. 
  

   Nat. 
  Mus., 
  vol. 
  4, 
  1921, 
  p. 
  278, 
  pi. 
  56, 
  fig. 
  4. 
  

  

  Description. 
  — 
  Variety 
  differing 
  from 
  the 
  typical 
  in 
  having 
  the 
  sur- 
  

   face 
  with 
  numerous 
  longitudinal 
  striations, 
  rather 
  more 
  elongate, 
  

   and 
  the 
  central 
  indented 
  portion 
  deeper 
  and 
  more 
  defined. 
  

  

  The 
  only 
  localities 
  for 
  this 
  variety 
  are 
  in 
  the 
  Pacific. 
  It 
  was 
  

   originally 
  described 
  from 
  the 
  Philippines, 
  where 
  it 
  occurs 
  at 
  numerous 
  

   stations 
  in 
  135 
  to 
  554 
  fathoms 
  with 
  a 
  single 
  record 
  at 
  1,262 
  fathoms. 
  

   I 
  have 
  also 
  had 
  it 
  from 
  off 
  New 
  Zealand. 
  

  

  Heron-Allen 
  and 
  Earland 
  15 
  mention 
  feebly 
  striate 
  specimens 
  of 
  S. 
  

   bifrons 
  occurring 
  as 
  fossils. 
  

  

  SIPHOGENERINA 
  AUSTRALIENSIS 
  (Goddard 
  and 
  Jensen) 
  

  

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

   Wales, 
  vol. 
  32, 
  1907, 
  p. 
  299, 
  pi. 
  6, 
  figs. 
  Sa-c. 
  

  

  The 
  authors 
  describe 
  this 
  species 
  as 
  follows: 
  

  

  This 
  species 
  has 
  a 
  nvigerine 
  commencement, 
  after 
  which 
  it 
  consists 
  of 
  a 
  

   uniserial 
  row 
  of 
  oval 
  chambers 
  cylindrical 
  in 
  section. 
  The 
  character 
  of 
  the 
  shell 
  

   is 
  intermediate 
  between 
  S. 
  dimorpha 
  and 
  S. 
  virgula. 
  The 
  shell 
  is 
  thick 
  and 
  

   studded 
  with 
  large 
  pits 
  as 
  in 
  S. 
  dimorpha. 
  There 
  are 
  also 
  tubercles 
  externally 
  

   approximating 
  to 
  the 
  spines 
  of 
  S. 
  virgula. 
  The 
  neck 
  is 
  as 
  in 
  S. 
  virgula. 
  

  

  There 
  is 
  a 
  distinct 
  constriction 
  at 
  the 
  junction 
  of 
  the 
  chambers, 
  and 
  some 
  of 
  

   the 
  chambers 
  are 
  prodcced 
  outwards 
  into 
  small 
  monticular 
  prominences. 
  (See 
  

   fig. 
  3a.) 
  The 
  chambers 
  increase 
  gradually 
  in 
  size. 
  

  

  Under 
  a 
  high 
  power 
  the 
  surface 
  appears 
  as 
  in 
  fig. 
  36. 
  On 
  focussing 
  down, 
  

   canals 
  are 
  seen 
  in 
  the 
  walls, 
  extending 
  from 
  the 
  interior 
  and 
  opening 
  to 
  the 
  

   exterior 
  in 
  the 
  small 
  tubercles. 
  

  

  Size: 
  Length, 
  0.7 
  mm. 
  

  

  Their 
  specimens 
  were 
  from 
  15 
  fathoms, 
  off 
  Palm 
  Island, 
  near 
  

   Townsville, 
  Queensland, 
  collected 
  by 
  C. 
  Hedley. 
  

  

  From 
  the 
  rather 
  poor 
  figures 
  and 
  rather 
  meagre 
  description, 
  it 
  is 
  

   difficult 
  to 
  discover 
  much 
  as 
  to 
  the 
  relationships 
  of 
  this 
  form. 
  

  

  There 
  is 
  a 
  very 
  slender 
  species 
  with 
  numerous 
  uniserial 
  chambers 
  

   and 
  10 
  to 
  12 
  costae, 
  which 
  occurs 
  in 
  the 
  Navarro, 
  Upper 
  Cretaceous 
  

   clays, 
  one-half 
  mile 
  south 
  of 
  Kemp, 
  Texas. 
  This 
  may 
  be 
  known 
  

   as 
  Siphogenerina 
  plummeri 
  Cushman, 
  new 
  species, 
  and 
  will 
  be 
  

   figured 
  later. 
  

  

  There 
  are 
  numerous 
  other 
  species 
  assigned 
  by 
  various 
  authors 
  to 
  

   Sagrina 
  which 
  do 
  not 
  seem 
  properly 
  to 
  belong 
  to 
  Siphogenerina. 
  

  

  '« 
  British 
  Antarctic 
  Exped., 
  Zoology, 
  vol. 
  6, 
  1922, 
  p. 
  186. 
  

  

  