﻿U. 
  S. 
  GEOLOGICAL 
  SURVEY 
  

  

  BULLETIN 
  NO. 
  322 
  PL. 
  XIX 
  

  

  : 
  ■«•-.. 
  ... 
  .... 
  ■■■■'" 
  

  

  MONTEREY 
  (MIDDLE 
  MIOCENE) 
  DIATOMS. 
  

  

  1784— 
  Bull. 
  322—07 
  10 
  

  

  