﻿WRIGHT 
  AND 
  ADAMS 
  MALTESE 
  ECDTLNODERMS. 
  491 
  

  

  Fig. 
  6 
  a. 
  Pygorhynchus 
  Spratti, 
  Wright. 
  Upper 
  surface. 
  

  

  6 
  b. 
  , 
  Wright. 
  Under 
  surface, 
  magnified. 
  

  

  6 
  c. 
  , 
  Wright. 
  Lateral 
  view, 
  magnified. 
  

  

  6 
  d. 
  , 
  Wright. 
  Apical 
  disk, 
  magnified. 
  

  

  Plate 
  XXII. 
  

  

  Fig. 
  1. 
  Brissus 
  tuberculatus, 
  Wright. 
  Upper 
  surface, 
  reduced 
  one-half. 
  

  

  2. 
  imbricatus, 
  Wright. 
  Upper 
  surface, 
  reduced 
  one-half. 
  

  

  3. 
  Prenaster 
  excentricus, 
  Wright. 
  Upper 
  surface, 
  natural 
  size. 
  

  

  4 
  a. 
  Spatangus 
  delphinus, 
  Defrance. 
  Upper 
  surface, 
  reduced 
  one-half. 
  

  

  4 
  b. 
  , 
  Defrance. 
  Under 
  surface, 
  reduced 
  one-half. 
  

  

  5 
  a. 
  Eupatagus 
  Konincki, 
  Wright. 
  Upper 
  surface, 
  natural 
  size. 
  

   5 
  b. 
  , 
  Wright. 
  Under 
  surface, 
  natural 
  size. 
  

  

  5 
  c. 
  , 
  Wright. 
  Lateral 
  view, 
  natural 
  size. 
  

  

  6 
  a. 
  Pygorhynchus 
  Vassali, 
  Wright. 
  Upper 
  surface, 
  natural 
  size. 
  

   6 
  b. 
  , 
  Wright. 
  Under 
  surface, 
  natural 
  size. 
  

  

  6 
  c. 
  , 
  Wright. 
  Lateral 
  view, 
  natural 
  size. 
  

  

  