﻿art. 
  25 
  GENERA 
  SIPHOGENERINA 
  AND 
  PAVONINA 
  CUSHMAN 
  19 
  

  

  GENUS 
  PAVONINA 
  d'ORBIGNY 
  

  

  The 
  genus 
  Pavonina 
  was 
  originally 
  described 
  by 
  d'Orbigny 
  in 
  1828 
  18 
  

   in 
  a 
  few 
  words: 
  "Plusiers 
  ouvertures 
  aux 
  loges; 
  test 
  dcprime 
  lateral 
  e- 
  

   ment 
  ; 
  loges 
  concentriques." 
  The 
  type 
  species 
  Pavonina 
  flabelliformis 
  

   is 
  given 
  from 
  Madagascar. 
  There 
  is 
  no 
  specific 
  description, 
  but 
  a 
  

   figure 
  is 
  given, 
  and 
  the 
  species 
  is 
  illustrated 
  also 
  in 
  the 
  Modeles, 
  No. 
  

   56. 
  The 
  early 
  chambers 
  of 
  the 
  Modele 
  show 
  definitely 
  alternating 
  

   chambers 
  in 
  the 
  ones 
  I 
  have 
  seen, 
  but 
  neither 
  the 
  1826 
  figure 
  nor 
  its 
  

   modification 
  in 
  1846 
  17 
  show 
  this 
  character. 
  Neither 
  does 
  the 
  more 
  

   elaborated 
  description 
  of 
  1846 
  make 
  any 
  mention 
  of 
  the 
  textularian 
  

   character 
  of 
  the 
  early 
  chambers. 
  This 
  lack 
  of 
  alternating 
  chambers 
  

   in 
  the 
  figures 
  given 
  by 
  d'Orbigny 
  so 
  deceived 
  Parker 
  and 
  Jones 
  that 
  

   in 
  their 
  review 
  of 
  d'Orbigny's 
  1826 
  work 
  18 
  they 
  conceive 
  the 
  idea 
  

   that 
  it 
  may 
  belong 
  to 
  the 
  Miliolidae 
  and 
  be 
  a 
  form 
  of 
  either 
  Peneroplis 
  

   or 
  Orbitolites. 
  It 
  was 
  therefore 
  not 
  until 
  Brady 
  obtained 
  good 
  mate- 
  

   rial 
  first 
  from 
  the 
  Seychelles 
  19 
  and 
  later 
  from 
  the 
  Challenger 
  Expedi- 
  

   tion, 
  20 
  that 
  the 
  true 
  structure 
  of 
  this 
  species 
  and 
  of 
  the 
  genus 
  became 
  

   known. 
  Brady 
  correctly 
  placed 
  Pavonina 
  in 
  the 
  Textulariidae* 
  

   Moebius 
  in 
  1880 
  21 
  described 
  and 
  figured 
  specimens 
  from 
  Mauritius, 
  

   and 
  still 
  further 
  calls 
  attention 
  to 
  the 
  true 
  structure. 
  Since 
  the 
  

   excellent 
  figures 
  given 
  by 
  Brady 
  also 
  in 
  the 
  Challenger 
  Report 
  22 
  little 
  

   further 
  needs 
  to 
  be 
  added 
  to 
  this 
  particular 
  species, 
  but 
  since 
  that 
  

   date 
  other 
  species 
  have 
  been 
  distinguished. 
  These 
  will 
  be 
  noted 
  

   later. 
  

  

  Genus 
  PAVONINA 
  d'Orbigny, 
  1826 
  

  

  Pavonina 
  d'Orbigny 
  (type, 
  P. 
  flabelliformis 
  d'Orbigny), 
  Ann. 
  Sci. 
  Nat.,, 
  

   vol. 
  7, 
  1826, 
  p. 
  260; 
  Foram. 
  Foss. 
  Bass. 
  Tert. 
  Vienne, 
  1846, 
  p. 
  72 
  — 
  

   H. 
  B. 
  Brady, 
  Rep. 
  Voy. 
  Challenger, 
  Zoology, 
  vol. 
  9, 
  1884, 
  p. 
  274 
  — 
  

   Chapman, 
  The 
  Foraminifera, 
  1902, 
  p. 
  169. 
  — 
  Cushman, 
  Bull. 
  71, 
  U. 
  S. 
  

   Nat. 
  Mus., 
  pt. 
  2, 
  1911, 
  p. 
  30; 
  Bull. 
  104, 
  pt. 
  3, 
  1922, 
  p. 
  51. 
  

  

  Description. 
  — 
  Test 
  calcareous, 
  hyaline, 
  perforate, 
  many-cham- 
  

   bered, 
  the 
  early 
  chambers 
  biserial, 
  alternating, 
  the 
  later 
  ones 
  uni- 
  

   serial, 
  broad, 
  curved, 
  in 
  the 
  type 
  species 
  becoming 
  embracing, 
  this 
  

   later 
  series 
  finally 
  composed 
  of 
  one 
  or 
  more 
  chambers; 
  sutures 
  

   limbate; 
  wall 
  usually 
  thin 
  and 
  translucent, 
  coarsely 
  perforate; 
  aper- 
  

   tural 
  wall 
  with 
  one 
  or 
  more 
  rows 
  of 
  rounded 
  apertural 
  openings. 
  

  

  The 
  genus 
  is 
  known 
  both 
  in 
  the 
  Tertiary 
  and 
  in 
  the 
  present 
  ocean,, 
  

   represented 
  by 
  several 
  species. 
  

  

  » 
  Ann. 
  Sci. 
  Nat., 
  vol. 
  7, 
  1826, 
  p. 
  260. 
  

  

  " 
  Foram. 
  Foss. 
  Vienne, 
  1846, 
  pi. 
  21, 
  figs. 
  9 
  and 
  10. 
  

  

  is 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  vol. 
  12, 
  1863, 
  p. 
  440. 
  

  

  '» 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  4, 
  vol. 
  19, 
  1877, 
  p. 
  41. 
  

  

  2» 
  Quart. 
  Journ. 
  Mier. 
  Sci., 
  vol. 
  19, 
  1879, 
  p. 
  68, 
  pi. 
  8, 
  figs. 
  29, 
  30. 
  

  

  2i 
  Beitr. 
  Meeresfauna 
  Insel 
  Mauritius, 
  18S0, 
  p. 
  91, 
  pi. 
  8, 
  figs. 
  13-15 
  

  

  "P. 
  374, 
  pi. 
  45, 
  figs. 
  17-21. 
  

  

  