﻿PLATE 
  CTX. 
  

  

  Nauticaris 
  futilirostris 
  (p. 
  606). 
  

   Fig. 
  1. 
  Lateral 
  view 
  ; 
  enlarged 
  twice. 
  

  

  Hetairus 
  gaimardii 
  (p. 
  611). 
  

   ,, 
  '2. 
  Lateral 
  view 
  ; 
  enlarged 
  four 
  times. 
  

   „ 
  2d. 
  Mandible. 
  

   „ 
  2<7. 
  Third 
  siagnopod. 
  

   „ 
  '2h. 
  First 
  gnathopod. 
  

  

  Hetairus 
  tenuis 
  (p. 
  613). 
  

   ,, 
  3. 
  Lateral 
  view 
  ; 
  enlarged 
  three 
  times. 
  

  

  Hetairus 
  debilis 
  (p. 
  615). 
  

   „ 
  4. 
  Lateral 
  view 
  ; 
  enlarged 
  four 
  times. 
  

  

  