﻿art. 
  25 
  GENERA 
  SIPHOGENEBINA 
  AND 
  PAVONINA 
  CUSHMAN 
  11 
  

  

  ridges 
  between 
  these 
  costae 
  which, 
  while 
  they 
  may 
  not 
  indicate 
  the 
  internal 
  

   structure 
  of 
  the 
  chambers, 
  serve 
  to 
  mark 
  their 
  location. 
  The 
  aperture 
  ends 
  in 
  

   a 
  neatly 
  raised, 
  phialine, 
  everted 
  lip 
  with 
  central 
  rounded 
  orifice. 
  

  

  Length 
  about 
  1 
  mm. 
  

  

  The 
  type 
  specimen 
  is 
  from 
  the 
  Miocene, 
  Choptank 
  Formation, 
  

   Jones 
  Wharf, 
  Maryland. 
  I 
  have 
  had 
  this 
  specimen 
  for 
  study, 
  and 
  

   the 
  sutures 
  seem 
  much 
  more 
  clearly 
  marked 
  than 
  in 
  the 
  figure. 
  It 
  

   is 
  a 
  microspheric 
  specimen. 
  

  

  It 
  is 
  related 
  to 
  S. 
  lamellata 
  Cushman, 
  which 
  is 
  a 
  more 
  extremely 
  

   lamellate 
  species. 
  

  

  SIPHOGENERINA 
  COLUMELLARIS 
  (H. 
  B. 
  Brady) 
  

  

  Plate 
  2, 
  figs. 
  4, 
  11; 
  plate 
  3, 
  figs. 
  1-4; 
  plate 
  4, 
  figs. 
  5, 
  6; 
  plate 
  5, 
  figs. 
  9-11 
  

  

  Sagrina 
  columellaris 
  H. 
  B. 
  Brady, 
  Quart. 
  Journ. 
  Micr. 
  Sci., 
  vol. 
  21, 
  1881, 
  

   p. 
  64; 
  Rep. 
  Voy. 
  Challenger, 
  Zoology, 
  vol. 
  9, 
  1884, 
  p. 
  581 
  pi. 
  75, 
  figs. 
  

   15-17. 
  — 
  Chapman, 
  Proc. 
  Zool. 
  Soc. 
  London, 
  1895, 
  p. 
  36. 
  — 
  Fornasini, 
  

   Rend. 
  Accad. 
  Sci. 
  Bologna, 
  vol. 
  1, 
  (1896-97) 
  1897, 
  p. 
  55, 
  text 
  figure; 
  

   Mem. 
  Accad. 
  Sci. 
  1st. 
  Bologna, 
  ser. 
  5, 
  vol. 
  8, 
  1900, 
  p. 
  391, 
  fig. 
  41. 
  — 
  

   Chapman, 
  Journ. 
  Linn. 
  Soc. 
  Zool., 
  vol. 
  28, 
  1902, 
  p. 
  404. 
  — 
  Millett, 
  

   Journ. 
  Roy. 
  Micr. 
  Soc, 
  1903, 
  p. 
  270, 
  pi. 
  5, 
  figs. 
  10, 
  11.— 
  Bagg, 
  Proc. 
  

   U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  34, 
  1908, 
  p. 
  151. 
  — 
  Heron-Allen 
  and 
  Earland, 
  

   Trans. 
  Zool. 
  Soc. 
  London, 
  vol. 
  20, 
  1915, 
  p. 
  676. 
  — 
  Sidebottom, 
  Journ. 
  

   Roy. 
  Micr. 
  Soc, 
  1918, 
  p. 
  148, 
  pi. 
  5, 
  fig. 
  24. 
  — 
  Heron-Allen 
  and 
  Ear- 
  

   land, 
  British 
  Antarctic 
  Exped., 
  Zoology, 
  vol. 
  6, 
  1922, 
  p. 
  185; 
  Journ. 
  

   Linn. 
  Soc. 
  Zool., 
  vol. 
  35, 
  1924, 
  p. 
  626. 
  

  

  Siphogenerina 
  (Sagrina) 
  columellaris 
  Egger, 
  Abh. 
  kon. 
  bay. 
  Akad. 
  Wiss. 
  

   Munchen, 
  CI. 
  II, 
  vol. 
  18, 
  1893, 
  p. 
  316, 
  pi. 
  9, 
  figs. 
  28, 
  31, 
  33. 
  

  

  Siphogenerina 
  columellaris 
  Silvestri, 
  Atti 
  Pont. 
  Accad. 
  Nuovi 
  Lincei, 
  ann. 
  

   55, 
  1902, 
  p. 
  1, 
  figs. 
  1, 
  2.— 
  Cushman, 
  Bull. 
  71, 
  U. 
  S. 
  Nat. 
  Mus., 
  pt. 
  3, 
  1913, 
  

   p. 
  104, 
  pi. 
  47, 
  figs. 
  2, 
  3; 
  Bull. 
  100, 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  4, 
  1921, 
  p. 
  276, 
  

   pi. 
  56, 
  fig. 
  1; 
  Publ. 
  342, 
  Carnegie 
  Inst. 
  Washington, 
  1924, 
  p. 
  29, 
  pi. 
  8, 
  

   figs. 
  5, 
  6. 
  

  

  Siphogenerina 
  glabra 
  Schlumberger, 
  Feuille 
  des 
  Jeunes 
  Naturalistes, 
  1883, 
  

   p. 
  118, 
  pi. 
  3, 
  fig. 
  1. 
  

  

  Description. 
  — 
  Test 
  elongate, 
  subcylindrical, 
  somewhat 
  tapering, 
  

   straight 
  or 
  very 
  slightly 
  curved; 
  chambers 
  comparatively 
  few, 
  those 
  

   of 
  the 
  uniserial 
  portion 
  well 
  rounded, 
  shorter 
  than 
  broad; 
  sutures 
  

   only 
  slightly 
  constricted; 
  aperture 
  large, 
  terminal, 
  with 
  a 
  very 
  short 
  

   tubular 
  neck 
  and 
  broad 
  flaring 
  lip; 
  wall 
  smooth. 
  

  

  Length 
  about 
  1 
  mm. 
  

  

  Distribution. 
  — 
  Brady's 
  Challenger 
  records 
  for 
  this 
  species 
  are 
  as 
  

   follows: 
  "Off 
  Gomera 
  and 
  off 
  Palma, 
  Canaries, 
  at 
  600 
  fathoms 
  and 
  

   1,125 
  fathoms, 
  respectively; 
  off 
  the 
  Azores, 
  450 
  fathoms; 
  off 
  Pernam- 
  

   buco, 
  350 
  fathoms; 
  on 
  the 
  shore 
  at 
  Tamatave, 
  Madagascar; 
  at 
  three 
  

   stations 
  on 
  the 
  southeast 
  coast 
  of 
  Australia, 
  6 
  fathoms 
  to 
  410 
  fathoms; 
  

   and 
  at 
  five 
  amongst 
  the 
  islands 
  of 
  the 
  South 
  Pacific, 
  125 
  to 
  620 
  

   fathoms." 
  Chapman 
  records 
  it 
  from 
  the 
  Arabian 
  Sea 
  and 
  off 
  

   Funafuti; 
  Millett 
  from 
  the 
  Malay 
  Archipelago; 
  Bagg 
  from 
  the 
  region 
  

  

  