﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  67. 
  ART. 
  21 
  PL. 
  27 
  

  

  ■ 
  . 
  

  

  IV* 
  

  

  * 
  

  

  7 
  

  

  

  Lower 
  Cretaceous 
  Cyclostomatous 
  Bryozoa 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  120 
  

  

  