﻿MARINE 
  POLYCHAETE 
  WORMS 
  — 
  PETTIBONE 
  283 
  

  

  P 
  Q 
  

  

  Figure 
  32. 
  — 
  For 
  explanation 
  see 
  facing 
  page. 
  

  

  261112—54 
  6 
  

  

  