﻿EXPLANATION 
  OF 
  PLATES 
  343 
  

  

  Plate 
  \S.—LITT0RINA, 
  LACUNA, 
  PHASIANELLA. 
  MARGARITES, 
  ACMAEA. 
  

   LEPETA, 
  PUNCTURELLA, 
  AND 
  FISSURELLA 
  

  

  Figure 
  Page 
  

  

  I, 
  2. 
  Littorina 
  subrotmidata 
  (Carpenter) 
  159 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  15586. 
  Length, 
  7 
  mm. 
  ; 
  greatest 
  diameter, 
  5 
  mm. 
  

   3, 
  4. 
  Lacuna 
  solidula 
  compacta 
  Carpenter 
  155 
  

  

  Syntype, 
  U.S.N.M., 
  No. 
  15530b. 
  Length, 
  6 
  mm. 
  ; 
  greatest 
  diameter, 
  4 
  mm. 
  

   5, 
  6. 
  Phasianella 
  compta 
  punctulata 
  Carpenter 
  151 
  

  

  Syntype, 
  U.S.N.M., 
  No. 
  11288; 
  X 
  8. 
  

   7, 
  8. 
  "Littorina 
  {? 
  Algamorda) 
  castanea" 
  Carpenter 
  158 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  16290. 
  Length, 
  5+ 
  mm.; 
  greatest 
  diameter, 
  3.5± 
  mm. 
  

   9, 
  10. 
  Margarites 
  inflatulus 
  Dall 
  131 
  

  

  Holotype, 
  M. 
  inflata 
  Cpr., 
  U.S.N.M., 
  No. 
  4494. 
  Length, 
  5 
  mm. 
  ; 
  greatest 
  dia- 
  

   meter, 
  5 
  mm. 
  

  

  II, 
  12. 
  "Acmaea 
  niitra 
  tenuisculpta 
  Dall' 
  124 
  

  

  Syntype, 
  U.S.N.M., 
  No. 
  15490; 
  X 
  2. 
  

  

  13. 
  "Acmaea 
  mitra 
  tenuisculpta 
  Dall"' 
  124 
  

  

  Syntype, 
  U.S.N.M., 
  No. 
  15490; 
  X 
  2. 
  

  

  14, 
  15. 
  Lepeta 
  caecoides 
  Carpenter 
  128 
  

  

  Holoype, 
  U.S.N.M., 
  No. 
  11849. 
  Length, 
  11.5 
  mm.; 
  greatest 
  diameter, 
  10 
  mm.; 
  

  

  height, 
  6 
  mm. 
  

  

  16, 
  17. 
  Punctiirella 
  cooperi 
  Carpenter 
  120 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  11848. 
  Length, 
  8 
  mm.; 
  greatest 
  diameter, 
  5 
  mm.; 
  

  

  height, 
  6 
  mm. 
  

  

  18. 
  Acmaea 
  triangularis 
  (Carpenter) 
  126 
  

  

  Syntype, 
  "Nacella 
  casta 
  Cpr.," 
  Redpath 
  Mur., 
  No. 
  2370. 
  Length, 
  13 
  mm. 
  ; 
  great- 
  

   est 
  diameter, 
  12 
  mm.; 
  height, 
  4 
  mm. 
  

  

  19. 
  Fissurella 
  volcano 
  Reeve 
  121 
  

  

  Type 
  ? 
  British 
  Museum 
  (Nat. 
  Hist.), 
  No. 
  61.5.18.16, 
  Col. 
  Nuttall, 
  of 
  F. 
  

   ornata 
  Nuttall, 
  MS. 
  "U. 
  Calif." 
  (Nuttall 
  label). 
  "The 
  specimen 
  marked 
  No. 
  

   1 
  in 
  pencil 
  by 
  Carpenter 
  Volcano. 
  Rve;" 
  X 
  1. 
  

  

  