﻿PLATE 
  CXLIV. 
  

  

  Icotopus 
  armirostris 
  (p. 
  886). 
  

  

  Fig. 
  1. 
  Lateral 
  view 
  ; 
  enlarged 
  ten 
  times. 
  

   „ 
  Id. 
  Mandible. 
  

   ,, 
  If. 
  Second 
  siagnopod. 
  

   „ 
  Ig. 
  Third 
  siagnopod. 
  

   ,, 
  Ibr. 
  Branchial 
  plume. 
  

   „ 
  lo. 
  Cephalon. 
  

  

  Hectarthroimii 
  exilis 
  (p. 
  889). 
  

   ,, 
  2. 
  Lateral 
  view 
  ; 
  enlarged 
  ten 
  times. 
  

   „ 
  2t. 
  Fifth 
  somite 
  ; 
  dorsal 
  aspect. 
  

  

  Hectai'thropus 
  compi-essu.s 
  (p. 
  891). 
  

   „ 
  ;5. 
  Lateral 
  view 
  ; 
  enlarged 
  eleven 
  times. 
  

  

  Hectartkropus 
  expanaus 
  (p. 
  892). 
  

   „ 
  4. 
  Dorsal 
  view 
  ; 
  enlarged 
  twelve 
  times. 
  

   „ 
  5. 
  Lateral 
  view 
  ; 
  enlarged 
  twelve 
  times. 
  

  

  Hectart/iropus 
  temiis 
  (p. 
  893). 
  

   ,, 
  6. 
  Lateral 
  view 
  ; 
  enlarged 
  ten 
  times. 
  

  

  