﻿EXPLANATION 
  OF 
  PLATE 
  III. 
  

  

  ASTRsEOSPONGIA 
  MENISCUS 
  Boemer. 
  

  

  Page 
  111. 
  

  

  Fig. 
  1. 
  The 
  convex 
  upper 
  side 
  of 
  an 
  individual 
  of 
  somewhat 
  irregular 
  form. 
  

   Fig. 
  2. 
  The 
  lower 
  side 
  of 
  another 
  individual 
  which 
  is 
  flat 
  or 
  slightly 
  concave 
  in 
  

  

  the 
  center 
  

   Fig. 
  3. 
  Vertical 
  section 
  of 
  the 
  ordinary 
  concavo-convex 
  form. 
  

   Fig. 
  4. 
  Lateral 
  view 
  of 
  a 
  specimen 
  of 
  ordinary 
  size 
  and 
  form. 
  

   Fig. 
  5. 
  Horizontal 
  section 
  magnified, 
  showing 
  the 
  character 
  and 
  construction 
  of 
  

  

  the 
  stars. 
  

   Fig. 
  6. 
  A 
  single 
  star 
  highly 
  magnified. 
  

  

  