﻿16 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.67 
  

  

  SIPHOGENERINA 
  ADVENA 
  Cushman 
  

  

  Plate 
  5, 
  figs. 
  3a, 
  b 
  

  

  Siphogenerina 
  advena 
  Cushman, 
  Publ. 
  311, 
  Carnegie 
  Inst. 
  Washington, 
  1922, 
  

   p. 
  35, 
  pi. 
  5, 
  fig. 
  2; 
  Bull. 
  104, 
  U. 
  S. 
  Nat. 
  Mus., 
  pt. 
  4, 
  1923, 
  p. 
  173, 
  pi. 
  42, 
  

   fig. 
  15. 
  

  

  Description. 
  — 
  Test 
  elongate, 
  somewhat 
  compressed, 
  early 
  portion 
  

   either 
  triserial 
  or 
  biserial, 
  later 
  portion, 
  which 
  makes 
  up 
  the 
  larger 
  

   portion 
  of 
  the 
  test, 
  uniserial; 
  chambers 
  numerous, 
  distinct, 
  inflated; 
  

   sutures 
  somewhat 
  depressed, 
  the 
  early 
  portion 
  and 
  a 
  part 
  of 
  the 
  

   uniserial 
  portion 
  with 
  fine, 
  longitudinal 
  costae, 
  more 
  or 
  less 
  broken, 
  

   followed 
  by 
  two 
  or 
  three 
  chambers 
  slightly 
  spinose, 
  after 
  which 
  the 
  

   remaining 
  chambers 
  are 
  smooth 
  and 
  very 
  finely 
  punctate; 
  aperture 
  

   elliptical, 
  each 
  one 
  connecting 
  with 
  the 
  preceding 
  by 
  an 
  internal 
  

   funnel-shaped 
  tube. 
  

  

  Length 
  up 
  to 
  0.65 
  mm. 
  

  

  Distribution. 
  — 
  This 
  species 
  was 
  originally 
  described 
  from 
  the 
  

   Tortugas 
  region 
  of 
  southern 
  Florida 
  in 
  comparatively 
  shallow 
  water. 
  

   It 
  has 
  also 
  occurred 
  in 
  the 
  western 
  part 
  of 
  the 
  Caribbean 
  off 
  Central 
  

   America 
  in 
  382 
  fathoms, 
  and 
  off 
  the 
  Carolina 
  coast 
  in 
  168 
  fathoms. 
  It 
  

   seems 
  therefore 
  to 
  be 
  a 
  species 
  of 
  the 
  tropical 
  western 
  Atlantic. 
  

  

  A 
  small 
  species 
  was 
  figured 
  by 
  Goes 
  as 
  ' 
  ' 
  Textularia 
  Pennatula, 
  var. 
  

   aculeata 
  forma 
  Bigenerina", 
  13 
  an 
  d 
  he 
  afterwards 
  gave 
  it 
  a 
  new 
  name, 
  

   Sagrina 
  pygmaea. 
  14 
  The 
  specimen 
  was 
  from 
  300 
  fathoms 
  in 
  the 
  

   Caribbean 
  Sea. 
  It 
  may 
  possibly 
  be 
  the 
  same 
  as 
  our 
  species, 
  but 
  the 
  

   figure 
  does 
  not 
  show 
  any 
  surface 
  ornamentation, 
  and 
  his 
  description 
  

   is 
  inadequate. 
  I 
  have 
  not 
  found 
  his 
  type 
  specimen. 
  

  

  SIPHOGENERINA 
  BIFRONS 
  (H. 
  B. 
  Brady) 
  

  

  Plate 
  3, 
  figs. 
  7-9; 
  plate 
  4, 
  fig. 
  4 
  

  

  Sagrina 
  bifrons 
  H. 
  B. 
  Brady, 
  Quart. 
  Journ. 
  Micr. 
  Sci., 
  vol. 
  21, 
  1881, 
  p. 
  64; 
  

  

  Rep. 
  Voy. 
  Challenger, 
  Zoology, 
  vol. 
  9, 
  1884, 
  p. 
  582, 
  pi. 
  75, 
  figs. 
  1S-20 
  — 
  

  

  Millett 
  Journ. 
  Roy. 
  Micr. 
  Soc, 
  1903, 
  p. 
  270. 
  — 
  Chapman, 
  Journ. 
  Linn. 
  

  

  Soc. 
  Zool., 
  vol. 
  30, 
  1910, 
  p. 
  415. 
  — 
  Schubert, 
  Abhandl. 
  geol. 
  Reichs., 
  vol. 
  

  

  20, 
  pt. 
  4, 
  1911, 
  p. 
  86. 
  — 
  Heron-Allen 
  and 
  Earland, 
  British 
  Antartic 
  

  

  Exped., 
  Zoology, 
  vol. 
  6, 
  1922, 
  p. 
  186. 
  

   Siphogenerina 
  (Sagrina) 
  bifrons 
  Egger, 
  Abh. 
  kon. 
  bay. 
  Akad. 
  Wiss. 
  Miin- 
  

  

  chen, 
  CI. 
  II, 
  vol. 
  18, 
  1893, 
  p. 
  317, 
  pi. 
  9, 
  figs. 
  25, 
  26, 
  29. 
  

   Siphogenerina 
  bifrons 
  Cushman, 
  Bull. 
  71, 
  U. 
  S. 
  Nat. 
  Mus., 
  pt. 
  3, 
  1913, 
  p. 
  

  

  105, 
  pi. 
  45, 
  figs. 
  1, 
  2, 
  5-7; 
  Bull. 
  100, 
  vol. 
  4, 
  1921, 
  p. 
  277, 
  pi. 
  56, 
  figs. 
  2, 
  3. 
  

  

  Description. 
  — 
  Test 
  elongate, 
  compressed, 
  straight 
  or 
  very 
  slightly 
  

   curved, 
  in 
  end 
  view 
  elliptical, 
  median 
  portions 
  of 
  the 
  broad 
  faces 
  

   somewhat 
  concave, 
  megalospheric 
  form 
  with 
  the 
  initial 
  end 
  broadly 
  

   rounded 
  and 
  of 
  about 
  the 
  same 
  diameter 
  as 
  the 
  rest 
  of 
  the 
  test, 
  

   microspheric 
  form 
  with 
  the 
  initial 
  end 
  much 
  more 
  attenuate, 
  grow- 
  

  

  >« 
  Kongl. 
  Svensk. 
  Vet. 
  Akad. 
  Uandl., 
  vol. 
  19, 
  No. 
  4, 
  1882, 
  p. 
  79, 
  pi. 
  5, 
  figs. 
  165, 
  166. 
  

   » 
  Bull. 
  Mus. 
  Comp. 
  Zool., 
  vol. 
  29, 
  1896, 
  p. 
  51. 
  

  

  