﻿PLATE 
  LV. 
  

  

  Benthesicymus 
  crenatus 
  (branchije) 
  (p. 
  329). 
  

  

  Fig. 
  1. 
  Pereion, 
  with 
  side 
  of 
  the 
  carapace 
  removed 
  to 
  show 
  the 
  arrangement 
  and 
  position 
  

   of 
  the 
  branchiae. 
  

  

  ,, 
  2. 
  Branchial 
  plume. 
  

  

  ,, 
  3. 
  Branch 
  of 
  the 
  same 
  ; 
  attached 
  to 
  the 
  central 
  stalk. 
  

  

  