﻿EXPLAXATIOX 
  OF 
  PLATES 
  345 
  

  

  Plate 
  20.— 
  BARLEEIA, 
  TACHVRHVNCHUS, 
  TURRIT 
  ELLA, 
  CAECUM, 
  

  

  MICRANELLUM, 
  ALABINA, 
  PETALOCONCHUS, 
  ALBANIA, 
  CERITHIDEA, 
  

  

  DIASTOMA, 
  OPALIA, 
  AND 
  EPITONIUM 
  

  

  Figure 
  Page 
  

  

  1-3. 
  Barleeia 
  sjibtentiis 
  Carpenter 
  165 
  

  

  U.S.N.M., 
  No. 
  32363; 
  X 
  15. 
  

  

  4. 
  Barleeia 
  subtenuis 
  rimata 
  Carpenter 
  166 
  

  

  L'.S.N.M., 
  No. 
  23734. 
  Length, 
  2.5± 
  mm.; 
  greatest 
  diameter, 
  1.25 
  mm. 
  

  

  5. 
  Tachyrhynchus 
  lacteolum 
  (Carpenter) 
  170 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  4195. 
  Length, 
  10.5 
  mm. 
  ; 
  greatest 
  diameter, 
  4 
  mm. 
  

  

  6. 
  Tachyrhyyichus 
  lacteolum 
  siibplanatxivi 
  Carpenter 
  171 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  4195b. 
  Length, 
  13 
  mm. 
  ; 
  greatest 
  diameter, 
  5 
  mm. 
  

  

  7. 
  Tiirritella 
  coopcri 
  Carpenter 
  168 
  

  

  Copy 
  of 
  original 
  drawing 
  of 
  Cooper. 
  Cpr. 
  MS., 
  Redpath 
  Museum. 
  

  

  8. 
  9. 
  Caecum 
  californiciDu 
  Dall 
  173 
  

  

  Syntypes, 
  C. 
  cooperi 
  Cpr., 
  U.S.N.M., 
  No. 
  15719. 
  Fig. 
  8, 
  length, 
  2 
  mm. 
  ; 
  Fig. 
  9, 
  

  

  length, 
  1.75 
  mm. 
  

  

  10, 
  11, 
  11 
  A. 
  Micranellum 
  crebricinctum 
  (Carpenter) 
  174 
  

  

  Syntypes, 
  U.S.N. 
  M.. 
  No. 
  14930. 
  Fig. 
  10, 
  X 
  6. 
  Fig. 
  10, 
  lOA, 
  same 
  specimen; 
  

  

  Fig. 
  11, 
  X 
  14. 
  

  

  12. 
  Alabina 
  turrita 
  (Carpenter) 
  181 
  

  

  Holotype, 
  L'.S.N.M., 
  No. 
  15566. 
  Length, 
  1.5 
  mm.; 
  greatest 
  diameter, 
  .75± 
  mm. 
  

  

  13, 
  14. 
  Alabina 
  teniiisculpta 
  (Carpenter) 
  181 
  

  

  Holotype, 
  L'.S.N.M., 
  No. 
  14933. 
  Length, 
  6.25 
  mm.; 
  greatest 
  diameter, 
  2 
  mm. 
  

  

  15. 
  Petaloconchus 
  compactus 
  (Carpenter) 
  172 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  13580; 
  X 
  1. 
  

  

  16, 
  17. 
  Alvania 
  compacta 
  (Carpenter) 
  162 
  

  

  Syntype, 
  U.S.N.M., 
  No. 
  4338. 
  Fig. 
  17, 
  X 
  6. 
  Fig. 
  16, 
  17, 
  same 
  specimen. 
  

  

  18A, 
  B, 
  C, 
  D, 
  E. 
  Alvania 
  compacta 
  (Carpenter) 
  162 
  

  

  Syntypes, 
  U.S.N.M., 
  No. 
  4338. 
  Figs. 
  18A, 
  C, 
  E. 
  X 
  6. 
  Fig. 
  18, 
  18A, 
  same 
  speci- 
  

   men 
  ; 
  Figs. 
  18C, 
  18B, 
  same 
  specimen; 
  Figs. 
  18D, 
  18E, 
  same 
  specimen. 
  

  

  19. 
  Ccrithidea 
  hegezvischii 
  albonodosa 
  Carpenter 
  175 
  

  

  Lectotype, 
  British 
  Mus. 
  (Nat. 
  Hist.) 
  1950. 
  11.9.2; 
  X 
  3. 
  Photo 
  Crown 
  copyright 
  

   reserve, 
  neg. 
  5166. 
  

  

  20, 
  21. 
  Diastoma 
  fastigiatum 
  (Carpenter) 
  183 
  

  

  L^S.N.M., 
  No. 
  16256. 
  Fig. 
  22, 
  length, 
  6 
  mm.; 
  Fig. 
  23, 
  4 
  mm.; 
  Fig. 
  22, 
  greatest 
  

   diameter, 
  1.5± 
  mm.; 
  Fig. 
  23, 
  1±: 
  mm. 
  

  

  22. 
  Opalia 
  cricta 
  de 
  Boury 
  190 
  

  

  Syntype, 
  Opalia 
  borealis 
  var. 
  pluricustata 
  Cpr. 
  ms. 
  Dall; 
  U.S.N.M., 
  No. 
  23397; 
  

   X 
  2. 
  

  

  23. 
  Epitonium 
  i)idianornm 
  (Carpenter) 
  186 
  

  

  Lectotype, 
  U.S.N.M., 
  No. 
  15521. 
  Length, 
  21 
  mm.; 
  greatest 
  diameter, 
  9 
  mm. 
  

  

  24. 
  Epitonium 
  indianorum 
  (Carpenter) 
  186 
  

  

  Paratype, 
  U.S.N.M., 
  No. 
  15521. 
  Length, 
  21 
  mm.; 
  greatest 
  diameter, 
  9 
  mm. 
  

  

  25. 
  26. 
  Epitonium 
  bellistriatum 
  (Carpenter) 
  189 
  

  

  Lectotype, 
  U.S.N.M., 
  No. 
  14831b. 
  Length, 
  9 
  mm.; 
  greatest 
  diameter, 
  7 
  mm. 
  

  

  27, 
  28. 
  "Epitonium 
  crebricostatuvt" 
  (Carpenter) 
  184 
  

  

  U.S.N.M., 
  No. 
  14831. 
  Length, 
  9 
  mm.; 
  greatest 
  diameter, 
  4.5 
  mm. 
  

  

  