﻿PLATE 
  IV. 
  

  

  [To 
  be 
  bound 
  facing 
  p. 
  457.] 
  

  

  Diagrammatic 
  representation 
  of 
  Ancillary 
  appendages 
  of 
  Crombrugghia 
  

   distans 
  (British) 
  and 
  C. 
  l.etus 
  (Spanish). 
  

  

  Fig. 
  1. 
  — 
  Dorsal 
  piece, 
  C. 
  distans. 
  Figs. 
  11-12. 
  — 
  Dorsal 
  piece, 
  C. 
  laetus. 
  

  

  Figs. 
  3-1.— 
  Upper 
  appendages 
  „ 
  Figs. 
  13-14. 
  — 
  Upper 
  appendages 
  ,, 
  

  

  Figs. 
  5-6. 
  — 
  Intermediate 
  append- 
  Figs. 
  15-16. 
  — 
  Intermediate 
  ap- 
  

  

  ages 
  ,, 
  pendages 
  ,, 
  

  

  Figs. 
  7-8. 
  — 
  Lower 
  appendages 
  „ 
  Fig. 
  17.- 
  — 
  Lower 
  appendages 
  ,, 
  

  

  Fig. 
  9. 
  ■ 
  — 
  JEdceagus 
  ,, 
  Fig. 
  19. 
  — 
  ^Edceagus 
  ,, 
  

   Fig. 
  10. 
  — 
  iEdceagus 
  of 
  C. 
  distans, 
  eversible 
  membrane 
  exserted. 
  

  

  N.B. 
  — 
  C. 
  distans 
  is 
  our 
  only 
  British 
  form. 
  C. 
  laetus 
  is 
  clearly 
  a 
  distinct 
  

   species 
  as 
  given 
  by 
  Zeller. 
  C. 
  lantoscanus 
  is 
  a 
  distinct 
  species, 
  not 
  a 
  form 
  of 
  

   either 
  of 
  these. 
  In 
  the 
  latter 
  the 
  intermediate 
  appendages 
  are 
  straight, 
  as 
  in 
  C. 
  

   distans, 
  the 
  end 
  piece 
  short, 
  as 
  in 
  C. 
  laetus, 
  with 
  other 
  differences. 
  — 
  T. 
  A. 
  

   Chapman. 
  

  

  