﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  

  A, 
  

  

  PROCEEDINGS, 
  VOL. 
  67. 
  ART. 
  25 
  PL. 
  4 
  

  

  <f@'^* 
  

  

  

  Wfmm 
  

  

  { 
  

  

  A 
  

  

  6 
  S 
  

  

  Species 
  of 
  Siphogenerina 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  24 
  

  

  