﻿350 
  MARINE 
  MOLLITSCA 
  DESCRTRED 
  RY 
  R. 
  R. 
  CARRENTER 
  

  

  Plate 
  2S.—V0LVULELLA, 
  MITROMORPHA, 
  PROPEBELA. 
  MANGELIA, 
  

   WILLIAMIA, 
  CYLICHNA, 
  AND 
  ACTEOCINA 
  

  

  Figure 
  Page 
  

  

  1, 
  2. 
  Volvulella 
  cylindrica 
  (Carpenter) 
  240 
  

  

  Holotype, 
  Redpath 
  Mus., 
  No. 
  2364. 
  Length, 
  5 
  mm. 
  ; 
  greatest 
  diameter, 
  2 
  mm. 
  

  

  3, 
  4. 
  Mitromorpha 
  aspcra 
  (Carpenter) 
  235 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  22816. 
  Length, 
  5.5 
  mm. 
  ; 
  greatest 
  diameter, 
  2 
  mm. 
  

  

  5, 
  6. 
  Mitromorpha 
  filosa 
  (Carpenter) 
  237 
  

  

  Holotype, 
  Redpath 
  Mus., 
  No. 
  96. 
  Length, 
  6.5 
  mm. 
  ; 
  greatest 
  diameter, 
  3 
  mm. 
  

   Figs. 
  5, 
  6, 
  same 
  specimen. 
  

  

  7-11. 
  Propebela 
  tabulata 
  (Carpenter) 
  234 
  

  

  Syntypes, 
  Redpath 
  Mus., 
  No. 
  89. 
  Fig. 
  7, 
  length, 
  11 
  mm.; 
  greatest 
  diameter, 
  

   5 
  mm.; 
  Fig. 
  9, 
  length, 
  13 
  mm.; 
  greatest 
  diameter, 
  5+ 
  mm.; 
  Fig. 
  11, 
  length, 
  

   12 
  mm.; 
  greatest 
  diameter, 
  5 
  mm. 
  

  

  12. 
  Mangelia 
  variegata 
  Carpenter 
  231 
  

  

  Syntype, 
  Redpath 
  Mus., 
  No. 
  92. 
  Length, 
  7 
  mm. 
  ; 
  greatest 
  diameter, 
  2.5 
  mm. 
  

  

  13, 
  14. 
  Mangelia 
  barbarensis 
  Oldroyd 
  228 
  

  

  M. 
  angulata 
  Cpr., 
  syntypes, 
  Redpath 
  Mus., 
  No. 
  90. 
  Fig. 
  13, 
  length, 
  8 
  mm. 
  ; 
  

   greatest 
  diameter, 
  3.75 
  mm.; 
  Fig. 
  14, 
  length, 
  6 
  mm. 
  ; 
  greatest 
  diameter, 
  3 
  mm. 
  

  

  15, 
  16. 
  Willia>nia 
  peltoides 
  (Carpenter) 
  259 
  

  

  Syntype, 
  Redpath 
  Mus., 
  No. 
  1156. 
  Length, 
  4 
  mm.; 
  greatest 
  diameter, 
  3.5 
  mm.; 
  

   height, 
  2 
  mm. 
  

  

  17, 
  18. 
  Cylichna 
  attonsa 
  Carpenter 
  242 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  4495. 
  Length, 
  10 
  mm.; 
  greatest 
  diameter, 
  4 
  mm. 
  

  

  19. 
  Actcocina 
  planata 
  (Carpenter) 
  242 
  

  

  Holotype, 
  Mus. 
  Paleontology, 
  Univ. 
  California, 
  No. 
  33501 
  ; 
  X 
  18. 
  Margin 
  of 
  

   labrum 
  broken. 
  

  

  