﻿EXPLANATION 
  OF 
  PLATES 
  347 
  

  

  Plate 
  22.— 
  OPALIA, 
  BARLERIA, 
  BITTIUM, 
  EPITONIUM, 
  ALVANIA, 
  DIALA, 
  

  

  AND 
  TURBONILLA 
  

  

  Figure 
  Pa^e 
  

  

  1-3. 
  Opalia 
  spongiosa 
  Carpenter 
  193 
  

  

  Holotype, 
  O. 
  spongiosa 
  Cpr., 
  U.S.N.M., 
  No. 
  14830. 
  Length, 
  9.5 
  mm.; 
  greatest 
  

   diameter, 
  3 
  mm. 
  

  

  4, 
  5. 
  Opalia 
  insculpta 
  Carpenter 
  191 
  

  

  Holotype, 
  Paleontological 
  Lab., 
  Cornell 
  University, 
  No. 
  4950. 
  Length, 
  14 
  mm., 
  

   greatest 
  diameter, 
  7 
  mm. 
  

  

  6. 
  Opalia 
  spongiosa 
  Carpenter 
  192, 
  193 
  

  

  Holotype, 
  O. 
  bullata 
  Carpenter. 
  Redpath 
  Mus., 
  No. 
  76. 
  Length, 
  8.5 
  mm. 
  ; 
  great- 
  

   est 
  diameter, 
  2-|- 
  mm. 
  

  

  7, 
  8. 
  Opalia 
  spongiosa 
  Carpenter 
  193 
  

  

  Holotype, 
  O. 
  refiporosa 
  Cpr., 
  U.S.N.M., 
  No. 
  11843. 
  Length, 
  7 
  mm.; 
  greatest 
  

   diameter, 
  2.75 
  mm. 
  

  

  9. 
  Barlecia 
  marmorea 
  (Carpenter) 
  164 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  14821. 
  Length, 
  5 
  mm.; 
  greatest 
  diameter, 
  2 
  mm. 
  

  

  10. 
  Bittium 
  armillatum 
  (Carpenter) 
  176 
  

  

  Syntype, 
  Redpath 
  Mus., 
  No. 
  4851. 
  Length, 
  11 
  mm.; 
  greatest 
  diameter, 
  3 
  mm. 
  

  

  11. 
  "Epitonium 
  crebricostatum 
  (Carpenter)" 
  184 
  

  

  British 
  Mus. 
  (Nat. 
  Hist.), 
  No. 
  "B.M. 
  1950.3.29.1 
  Mus. 
  Cuming"; 
  X 
  10. 
  Photo 
  

   Crown 
  copyright 
  reserve. 
  

  

  12. 
  13. 
  Epitonium 
  subcoronatum 
  (Carpenter) 
  187 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  14830b 
  (15732). 
  Length, 
  8 
  mm.; 
  greatest 
  diameter, 
  

   4 
  mm. 
  

  

  14. 
  Alvania 
  acuteliraia 
  (Carpenter) 
  161 
  

  

  Holotype, 
  Mus. 
  Paleontology, 
  Univ. 
  California, 
  No. 
  15572. 
  Length, 
  2.42 
  mm. 
  

  

  15. 
  Diala 
  acuta 
  Carpenter 
  166 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  390. 
  Length, 
  4 
  mm.; 
  greatest 
  diameter, 
  2 
  mm. 
  

  

  16 
  Turbonilla 
  stylina 
  (Carpenter) 
  257 
  

  

  Holotype, 
  Redpath 
  Mus., 
  No. 
  5729. 
  Length, 
  6 
  mm. 
  ; 
  greatest 
  diameter, 
  2 
  mm. 
  

  

  