﻿Report 
  of 
  the 
  State 
  Geologist, 
  

  

  1051 
  

  

  Scaphioccelia, 
  Whit- 
  

   field. 
  1891. 
  

  

  Shells 
  of 
  great 
  

   size; 
  piano-, 
  or 
  con- 
  

   cavo-convex 
  in 
  son- 
  

   tour. 
  Pedicle-valve 
  

   with 
  a 
  conspicuous 
  

   dorsum 
  and 
  broad, 
  

   fiat 
  lateral 
  slopes 
  ; 
  

   brachial 
  valve 
  with 
  

   an 
  angular 
  median 
  

   sulcus. 
  Surface 
  

   strongly 
  plicated. 
  

   Interior 
  unknown. 
  

   Shell 
  substance 
  fib- 
  

   rous 
  impunctate 
  (?). 
  

   Type, 
  Scaphioccelia 
  

   Boliviensis, 
  Whit- 
  

   field. 
  

  

  Distribution. 
  De- 
  

   vonian. 
  

  

  Fig. 
  473. 
  

  

  Fig. 
  472. 
  

   Scaphioccelia 
  Boliviensis, 
  Whitfield. 
  

  

  Figs. 
  472, 
  473. 
  Two 
  views 
  of 
  the 
  

   same 
  individual, 
  showing 
  the 
  exter- 
  

   nal 
  characters 
  of 
  the 
  species. 
  

  

  (Whitfield.) 
  

  

  [?] 
  Notothyris, 
  Waagen. 
  

  

  1882. 
  

  

  Shells 
  biconvex, 
  

   coarsely 
  plicate. 
  Hinge- 
  

   plate 
  tripartite, 
  per- 
  

   forated 
  as 
  in 
  Centeon- 
  

   ella. 
  Of 
  the 
  brachi- 
  

   dium 
  only 
  the 
  descend- 
  

   ing 
  lamellae 
  are 
  known. 
  

  

  109 
  

  

  