﻿PLATE 
  III. 
  

  

  Receptaculites 
  subturbinatus 
  Hall 
  

  

  Page 
  103. 
  

  

  Fig. 
  1. 
  Lateral 
  view 
  of 
  a 
  specimen 
  enlarged 
  to 
  two 
  diameters. 
  

  

  Fig. 
  2. 
  A 
  further 
  enlargement 
  of 
  the 
  surface, 
  showing 
  the 
  form 
  of 
  the 
  cells. 
  

  

  Fig. 
  3. 
  An 
  enlarged 
  summit 
  view 
  of 
  another 
  specimen. 
  

  

  ■ 
  

   ASTYLOSPONGIA 
  PR.EMORSA 
  GoldfuSS. 
  

  

  Page 
  103. 
  

  

  ja/ 
  

   Figs. 
  4, 
  5. 
  Lateral 
  and 
  summit 
  views 
  of 
  a 
  specimen 
  of 
  medium 
  size. 
  

  

  Fig. 
  6. 
  View 
  of 
  the 
  upper 
  side 
  of 
  a 
  more 
  deeply 
  lobed 
  specimen. 
  

  

  Figs. 
  7, 
  8. 
  Upper 
  and 
  lateral 
  views 
  of 
  a 
  very 
  perfectly 
  formed 
  specimen, 
  en- 
  

   larged 
  two 
  diameters. 
  

  

  Figs. 
  9, 
  11. 
  Vertical 
  sections 
  of 
  two 
  specimens 
  showing 
  structure, 
  enlarged 
  to 
  

   two 
  diameters. 
  The 
  dark 
  spots 
  in 
  the 
  center 
  are 
  filled 
  with 
  pyri- 
  

   tous 
  matter, 
  and 
  are 
  not 
  cavities. 
  

  

  Fig. 
  10. 
  Horizontal 
  section 
  of 
  another 
  specimen, 
  enlarged 
  two 
  diameters. 
  

  

  Fig. 
  14. 
  A 
  crushed 
  and 
  imperfect 
  specimen, 
  showing 
  the 
  radiating 
  fibrous-like 
  

   character 
  of 
  the 
  substance 
  (enlarged). 
  

  

  >wT 
  

   ASTYLOSPONGIA 
  PR^IMORSA 
  Var. 
  XTTXMOSCHATA 
  71. 
  VCLT. 
  

  

  Page 
  104. 
  

  

  Figs. 
  12, 
  13. 
  Lateral 
  and 
  summit 
  views 
  of 
  a 
  specimen, 
  showing 
  the 
  difference 
  in 
  

   the 
  form 
  and 
  lobation 
  of 
  the 
  surface 
  from 
  typical 
  A. 
  prmmarsa. 
  

  

  ASTYLOSPONGIA 
  (PaL^OMA^ON) 
  BURSA 
  Hall. 
  

  

  Page 
  105. 
  

   Figs. 
  15, 
  16. 
  Lateral 
  and 
  profile 
  views 
  of 
  a 
  crushed 
  specimen, 
  showing 
  the 
  

   characters 
  of 
  the 
  species. 
  

  

  

  