﻿PLATE 
  XLVIII. 
  

  

  Pen.eid/E 
  (Development). 
  

  

  PeihVKS 
  ; 
  Zoea 
  stage 
  (p. 
  237). 
  

  

  Penseus 
  ; 
  Megalopa 
  stage, 
  v. 
  v. 
  Sixth 
  pair 
  of 
  pleopocla. 
  

  

  Tliird 
  siagnopod 
  or 
  first 
  maxillipede. 
  

  

  First 
  gnathopod. 
  

  

  Third 
  pereiopod. 
  

   Zhr. 
  Branchife 
  of 
  a 
  young 
  Penxus. 
  

   3i', 
  z, 
  V. 
  Rhipidura 
  of 
  same. 
  

   4. 
  A 
  young 
  Penieus. 
  

  

  Am. 
  Chela 
  of 
  third 
  pereiopod. 
  

   br. 
  Early 
  condition 
  of 
  branchial 
  plume. 
  

  

  