﻿PLATE 
  XLIV. 
  

  

  Hemipenieus 
  spinidorsalis 
  (p. 
  301). 
  

   Fig. 
  1. 
  Lateral 
  view 
  ; 
  one-half 
  enlarged. 
  

   ,, 
  1". 
  Branctiiae, 
  seen 
  in 
  position. 
  

   „ 
  I'". 
  Mastigobranchia, 
  with 
  pdSobranchial 
  plume 
  attached. 
  

  

  Hemi2oen3Biis 
  gracilis 
  (p. 
  302). 
  

   2. 
  Lateral 
  view 
  ; 
  one-half 
  enlarged. 
  

  

  'O" 
  

  

  Hemipenseus 
  speciosus 
  (p. 
  303). 
  

  

  3. 
  Lateral 
  view. 
  

  

  Hemip>eniBUs 
  virilis 
  (p. 
  303). 
  

  

  4. 
  Lateral 
  view. 
  

  

  