﻿228 
  

  

  E. 
  RAY 
  LANKESTER. 
  

  

  are 
  capable 
  of 
  acting 
  as 
  masticatory 
  organs. 
  Lateral 
  eyes 
  

   consisting 
  of 
  a 
  densely 
  packed 
  group 
  of 
  eye-units 
  ("com- 
  

   pound 
  " 
  eyes). 
  

  

  Order 
  1. 
  Xiphosura. 
  — 
  The 
  prsegenital 
  somite 
  fuses 
  in 
  the 
  

  

  ^/ 
  

  

  Ca7 
  

  

  Pm^A 
  

  

  Fig. 
  45. 
  — 
  Ventral 
  view 
  of 
  Liniulus 
  polypliemus, 
  Lim. 
  Sf, 
  

   Subfrontal 
  selerite 
  ; 
  Cam, 
  camarosfome; 
  ilf, 
  mouth 
  ; 
  Pwsif, 
  prome- 
  

   sosternum 
  ; 
  cid, 
  cliilaria; 
  op, 
  genital 
  operculum 
  or 
  first 
  pair 
  of 
  

   appendages 
  of 
  the 
  mesosoma 
  ; 
  Br.app, 
  second 
  to 
  the 
  sixth 
  pair 
  of 
  

   appendages 
  of 
  the 
  mesosoma 
  bearing 
  the 
  branchial 
  laminae. 
  

  

  embryo 
  with 
  the 
  prosoma 
  and 
  disappears 
  (see 
  Fig. 
  19). 
  Not 
  

   free-swimming, 
  none 
  of 
  the 
  prosomatic 
  appendages 
  modified 
  

   to 
  act 
  as 
  paddles; 
  segments 
  of 
  the 
  mesosoma 
  and 
  metasoma 
  

  

  