﻿PLATE 
  LX. 
  

  

  Petalidiurn 
  foliaceiini 
  (p. 
  349). 
  

  

  Fig. 
  1. 
  Lateral 
  view 
  ; 
  enlarged 
  twice. 
  

  

  ,, 
  2. 
  Ural 
  apparatus 
  ; 
  d,cl, 
  distal 
  joints 
  of 
  the 
  synaphipud 
  of 
  the 
  maudiblcs 
  ; 
  d', 
  

   epistoma 
  ; 
  d",d", 
  metastoma 
  ; 
  e,e, 
  first 
  pair 
  of 
  siaguopoda. 
  

  

  d. 
  Siagon 
  or 
  inaudible. 
  

  

  c. 
  First 
  siagnopod 
  ; 
  detached. 
  

  

  / 
  Second 
  siagnopod 
  ; 
  detached. 
  

  

  y. 
  Third 
  siagnopod 
  ; 
  detached. 
  

   ,, 
  3. 
  Branchiae, 
  shown 
  in 
  position. 
  

   ,. 
  4. 
  A 
  foliaceous 
  branchial 
  plate. 
  

  

  