﻿FORAMINIFERA 
  OF 
  THE 
  GENERA 
  SIPHOGENERINA 
  

   AND 
  PAVONINA 
  

  

  By 
  Joseph 
  A. 
  Cushman 
  

  

  Of 
  Sharon, 
  Massachusetts 
  

  

  Continued 
  study 
  of 
  various 
  collections 
  of 
  Foraminifera, 
  largely 
  

   brought 
  together 
  through 
  governmental 
  agencies, 
  has 
  rendered 
  it 
  

   both 
  possible 
  and 
  advisable 
  to 
  present 
  at 
  this 
  time 
  a 
  revision 
  of 
  two 
  

   genera 
  of 
  Foraminifera 
  and 
  their 
  component 
  species, 
  the 
  Genus 
  

   Siphogenerina 
  Schlumberger, 
  and 
  Pavonina 
  d'Orbigny. 
  

  

  GENUS 
  SIPHOGENERINA 
  SCHLUMBERGER 
  

  

  There 
  seems 
  to 
  be 
  some 
  hestitation 
  on 
  the 
  part 
  of 
  certain 
  workers 
  

   on 
  the 
  Foraminifera 
  to 
  make 
  use 
  of 
  the 
  generic 
  name 
  Siphogenerina. 
  

   Instead 
  of 
  using 
  it 
  the 
  generic 
  name 
  Sagrina 
  is 
  often 
  used. 
  A 
  study 
  

   of 
  West 
  Indian 
  material 
  has 
  made 
  possible 
  the 
  clearing 
  up 
  of 
  the 
  

   questions 
  relating 
  to 
  these 
  two 
  generic 
  names. 
  A 
  review 
  of 
  much 
  

   of 
  the 
  literature, 
  and 
  of 
  species 
  so 
  far 
  as 
  specimens 
  are 
  available, 
  

   has 
  given 
  some 
  very 
  definite 
  information 
  as 
  to 
  distribution. 
  

  

  The 
  type 
  species 
  of 
  d'Orbigny's 
  genus 
  Sagrina 
  is 
  S. 
  pulchella 
  

   d'Orbigny. 
  1 
  The 
  description 
  and 
  figure 
  are 
  very 
  definite. 
  The 
  

   generic 
  description 
  freely 
  translated 
  is 
  as 
  follows 
  : 
  ' 
  ' 
  Test 
  free, 
  regular, 
  

   equilateral, 
  conical, 
  chambers 
  globular, 
  regularly 
  alternating 
  at 
  all 
  

   stages 
  on 
  each 
  side 
  of 
  the 
  longitudinal 
  axis, 
  partially 
  overlapping; 
  

   aperture 
  rounded, 
  above 
  the 
  last-formed 
  chamber 
  at 
  the 
  end 
  of 
  an 
  

   elongate 
  neck." 
  The 
  similarity 
  to 
  Textularia 
  is 
  also 
  noted. 
  The 
  

   other 
  species 
  from 
  the 
  Chalk 
  of 
  the 
  Paris 
  Basin, 
  S. 
  rugosa 
  d'Orbigny, 
  2 
  

   is 
  of 
  similar 
  character. 
  

  

  Little 
  further 
  note 
  is 
  made 
  of 
  Sagrina 
  until 
  in 
  1865 
  Parker 
  and 
  

   Jones 
  3 
  emended 
  it, 
  and 
  used 
  it 
  in 
  a 
  subgeneric 
  sense 
  under 
  Uvigerina 
  

   to 
  include 
  diaphanus, 
  dimorpha, 
  and 
  nodosa. 
  Their 
  work 
  was 
  fol- 
  

   lowed 
  by 
  subsequent 
  authors. 
  The 
  type 
  of 
  d'Orbigny 
  is 
  referred 
  to 
  

   as 
  follows 
  (p. 
  364): 
  "D'Orbigny 
  has 
  figured 
  under 
  the 
  name 
  of 
  

   Sagrina 
  pulchella 
  (Foram. 
  Cuba, 
  pi. 
  1, 
  figs. 
  23, 
  24) 
  a 
  specimen 
  which 
  

   was 
  either 
  the 
  young, 
  or 
  an 
  arrested 
  individual 
  of 
  such 
  a 
  biformed 
  

   Uvigerina^ 
  and 
  also: 
  "Not 
  only 
  is 
  our 
  Nodosariform 
  Uvigerina 
  

  

  i 
  De 
  la 
  Sagra, 
  Hist. 
  Fis. 
  Pol. 
  Nat. 
  Cuba, 
  1839, 
  "Foraminiferes," 
  p. 
  150, 
  pi. 
  1, 
  figs. 
  23, 
  24. 
  

   2 
  M^m. 
  Soc. 
  geol. 
  France, 
  vol. 
  4, 
  1840, 
  p. 
  47, 
  pi. 
  4, 
  figs. 
  31, 
  32. 
  

   s 
  Philos. 
  Trans., 
  vol. 
  155, 
  p. 
  363. 
  

  

  No. 
  2597.— 
  Proceedings 
  U. 
  S. 
  National 
  Museum 
  vol. 
  67, 
  art. 
  25. 
  

  

  53650— 
  26t 
  1 
  1 
  

  

  