﻿EXPLANATION 
  OF 
  PLATES 
  351 
  

  

  Plate 
  26.— 
  CYSTISCUS, 
  ADMETE, 
  OCENEBRA, 
  AND 
  MITRELLA 
  

   Figure 
  Page 
  

  

  1, 
  2. 
  Cystiscus 
  jezuettii 
  (Carpenter) 
  221 
  

  

  Gould 
  Coll., 
  A4268, 
  New 
  York 
  State 
  Mus. 
  Length, 
  5 
  mm. 
  ; 
  greatest 
  diameter, 
  

   3+ 
  mm. 
  

  

  3-4. 
  Cystiscus 
  suhtrigona 
  (Carpenter) 
  222 
  

  

  Holotype. 
  Figs. 
  3, 
  4, 
  same 
  specimen 
  ; 
  length, 
  3.5 
  mm. 
  ; 
  greatest 
  diameter, 
  2.5 
  

   mm.; 
  Fig. 
  5, 
  "paratype" 
  [not 
  same 
  species], 
  length, 
  4 
  mm.; 
  greatest 
  diam- 
  

   eter, 
  3 
  mm. 
  Redpath 
  Mus., 
  No. 
  81. 
  

  

  6, 
  7. 
  Admete 
  gracilior 
  (Carpenter) 
  223 
  

  

  Holotype, 
  Mus. 
  Paleontology, 
  Univ. 
  California, 
  No. 
  15530. 
  Fig. 
  6, 
  length, 
  8.8 
  

   mm. 
  ; 
  greatest 
  diameter, 
  4.5 
  mm., 
  Fig. 
  7, 
  paratype, 
  length, 
  7.5 
  mm. 
  ; 
  greatest 
  

   diameter, 
  3.8 
  mm. 
  

  

  8. 
  Ocenebra 
  poulsoni 
  (Carpenter) 
  205 
  

  

  Holotype, 
  British 
  Mus. 
  (Nat. 
  Hist.) 
  61.5.18.22 
  "U. 
  California"; 
  X 
  2. 
  Photo 
  

   Crown 
  copyright 
  reserved. 
  

  

  9-12. 
  Mitrella 
  tubcrosa 
  (Carpenter) 
  210 
  

  

  Syntypes, 
  Redpath 
  Mus., 
  No. 
  7Z. 
  Fig. 
  9, 
  length, 
  9 
  mm.; 
  Fig. 
  11, 
  length, 
  8 
  mm.; 
  

   Fig. 
  12, 
  length, 
  9 
  mm.; 
  Fig. 
  11, 
  greatest 
  diameter, 
  3 
  mm.; 
  Fig. 
  12, 
  greatest 
  

   diameter, 
  4-)- 
  mm. 
  

  

  