﻿10 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  Vol.67 
  

  

  SIPHOGENERINA 
  STRIATULA 
  Cushman 
  

  

  Plate 
  1, 
  fig. 
  10a, 
  b 
  

  

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

   p. 
  108, 
  pi. 
  47, 
  fig. 
  1. 
  — 
  Yabe 
  and 
  Hanzawa, 
  Jap. 
  Journ. 
  Geol. 
  Geog., 
  

   vol. 
  2, 
  No. 
  2, 
  1923, 
  p. 
  32. 
  

  

  Description. 
  — 
  Test 
  elongate, 
  subcylindrical 
  ; 
  chambers 
  mostly 
  

   broader 
  than 
  long, 
  the 
  last-formed 
  one 
  nearly 
  as 
  long 
  as 
  broad; 
  

   sutures 
  distinct, 
  slightly 
  depressed; 
  surface 
  ornamented 
  with 
  very 
  

   fine, 
  longitudinal 
  striae; 
  aperture 
  narrowly 
  elongated, 
  without 
  a 
  

   definite 
  neck 
  but 
  with 
  a 
  well-developed 
  lip. 
  

  

  Length 
  about 
  1 
  mm. 
  

  

  Distribution. 
  — 
  I 
  originally 
  found 
  this 
  species 
  in 
  material 
  from 
  

   numerous 
  stations 
  between 
  Yokohama 
  and 
  Japan, 
  at 
  depths 
  ranging 
  

   from 
  859 
  to 
  1,660 
  fathoms. 
  Yabe 
  and 
  Hanzawa 
  record 
  it 
  as 
  rare 
  

   from 
  the 
  Pliocene 
  shell 
  beds 
  of 
  Nojima, 
  Japan. 
  

  

  It 
  would 
  seem, 
  therefore, 
  that 
  it 
  is 
  a 
  species 
  of 
  the 
  northwestern 
  

   Pacific. 
  The 
  finely 
  striate 
  surface 
  and 
  elongate 
  aperture 
  are 
  charac- 
  

   teristic. 
  

  

  SIPHOGENERINA 
  LAMELLATA 
  Cushman 
  

  

  Plate 
  1, 
  fig. 
  13 
  

  

  Siphogenerina 
  lamellata 
  Cushman, 
  Bull. 
  676, 
  U. 
  S. 
  Geol. 
  Surv., 
  1918, 
  p. 
  55, 
  

   pi. 
  12, 
  fig. 
  3. 
  

  

  Description. 
  — 
  Test 
  elongate, 
  tapering 
  gradually 
  from 
  the 
  initial 
  

   end, 
  broadly 
  rounded 
  at 
  the 
  apertural 
  end; 
  chambers 
  comparatively 
  

   few, 
  indistinct, 
  surface 
  ornamentations 
  consisting 
  of 
  several 
  equi- 
  

   distant, 
  longitudinal 
  lamellae 
  extending 
  from 
  the 
  initial 
  end 
  to 
  the 
  

   apertural 
  end, 
  where 
  they 
  fuse; 
  aperture 
  with 
  a 
  tubular 
  neck 
  and 
  

   phialine 
  lip. 
  

  

  Length 
  1 
  mm. 
  

  

  This 
  species 
  is 
  known 
  only 
  from 
  the 
  Miocene 
  of 
  Florida, 
  from 
  the 
  

   Choctawhatchee 
  Marl, 
  one 
  mile 
  south 
  of 
  Red 
  Bay, 
  Florida. 
  Its 
  

   nearest 
  relative 
  is 
  S. 
  spinosa 
  Bagg 
  from 
  the 
  Miocene 
  of 
  Maryland, 
  

   but 
  the 
  Florida 
  species 
  has 
  much 
  stronger 
  developed 
  lamellae 
  and 
  

   no 
  evidence 
  of 
  a 
  spinose 
  base. 
  

  

  SIPHOGENERINA 
  SPINOSA 
  (Bagg) 
  

  

  Plate 
  1, 
  fig. 
  14 
  

  

  Sagrina 
  spinosa 
  Bagg, 
  Maryland 
  Geol. 
  Surv. 
  (Miocene), 
  1904, 
  p. 
  480, 
  pi. 
  

  

  133, 
  fig. 
  11. 
  

   Siphogenerina 
  spinosa 
  Cushman, 
  Bull. 
  676, 
  U. 
  S. 
  Geol. 
  Surv., 
  1918, 
  p. 
  55. 
  

  

  Description. 
  — 
  The 
  original 
  description 
  of 
  this 
  species 
  is 
  as 
  follows: 
  

  

  This 
  peculiar 
  and 
  interesting 
  species 
  somewhat 
  resembles 
  S. 
  raphanus 
  Parker 
  

   and 
  Jones, 
  but 
  differs 
  from 
  the 
  latter 
  in 
  several 
  particulars. 
  The 
  surface 
  ridges 
  

   in 
  our 
  specimen 
  end 
  in 
  a 
  series 
  of 
  projecting 
  points 
  which 
  at 
  the 
  distal 
  end 
  become 
  

   definite 
  spines, 
  though 
  these 
  are 
  short 
  and 
  stubby. 
  Again 
  there 
  are 
  arched 
  

  

  