﻿PLATE 
  LI. 
  

  

  Aristens 
  rostridentatus 
  (p. 
  317). 
  

   Fig. 
  1 
  . 
  Lateral 
  view 
  of 
  female. 
  

   ,, 
  1". 
  Ventral 
  aspect 
  ; 
  p, 
  p, 
  first 
  pair 
  of 
  pleopoda. 
  

   d. 
  Siagon 
  or 
  mandible. 
  

   hr. 
  Branchial 
  plume 
  in 
  section. 
  

   k''. 
  Spine 
  from 
  the 
  carpos 
  of 
  the 
  first 
  pair 
  of 
  pereiopoda. 
  

  

  