﻿GEOL. 
  SOC. 
  AM., 
  MEMOIR 
  76 
  

  

  PALMER, 
  PL. 
  32 
  

  

  CALLlSroCIIITOS, 
  MOPALIA, 
  DEXDROCIIITOS, 
  ACASTUOCIIITOSA, 
  AND 
  ISCIIXOCHITON 
  

  

  