﻿Report 
  U. 
  S. 
  F. 
  C. 
  1897, 
  (To 
  face 
  page 
  340.) 
  

  

  Plate 
  VI. 
  

  

  Fig. 
  1. 
  Upper 
  view 
  of 
  closed 
  valves 
  of 
  Pacific 
  oyster, 
  Ostrea 
  lurida. 
  

   Fig. 
  2. 
  Inuer 
  face 
  of 
  ventral 
  valve 
  of 
  same 
  specimen. 
  

   Fig. 
  3. 
  Outer 
  face 
  of 
  ventral 
  valve 
  of 
  same 
  specimen. 
  

  

  