﻿PLATE 
  LIV. 
  

  

  Benthesicymus 
  crenatus 
  (p. 
  329). 
  

   Lateral 
  view. 
  

  

  a. 
  Ophthalmopocl. 
  

  

  b. 
  First 
  antenna 
  ; 
  upper 
  surface. 
  

   h". 
  First 
  antenna 
  ; 
  under 
  surface. 
  

  

  c. 
  Second 
  antenna. 
  

  

  c". 
  Second 
  antenna 
  ; 
  second 
  joint 
  of 
  peduncle 
  showing 
  the 
  ancecerite 
  and 
  base 
  of 
  

   the 
  scaphocerite. 
  

  

  d. 
  Siagon 
  or 
  mandible, 
  with 
  metastoma, 
  d", 
  in 
  position, 
  

   s. 
  First 
  siagnopod. 
  

  

  /. 
  Second 
  siagnopod. 
  

  

  g. 
  Third 
  siagnopod. 
  

  

  h. 
  First 
  gnathopod. 
  

  

  i. 
  Second 
  gnathopod. 
  

  

  