﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  67, 
  ART. 
  21 
  PL. 
  21 
  

  

  

  6 
  .._ 
  M«ij 
  

  

  «u» 
  ♦ 
  

  

  * 
  

  

  laM 
  

  

  SN* 
  

  

  ■%.-*■ 
  

  

  L 
  Htai* 
  ' 
  . 
  

  

  

  

  m* 
  

  

  

  13 
  

  

  15 
  16 
  18 
  

  

  Lower 
  Cretaceous 
  Cyclostomatous 
  Bryozoa 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  1 
  14 
  

  

  