﻿336 
  MARINE 
  ^TOLLUSCA 
  DESCRIBED 
  BY 
  P. 
  P. 
  CARPENTER 
  

  

  Plate 
  U.—PROTOTHACA, 
  PSEPHIDIA, 
  AND 
  CHIONE 
  

   Figure 
  Page 
  

  

  1. 
  4, 
  5. 
  Protothaca 
  staminea 
  (Conrad) 
  97 
  

  

  Forma 
  orbella 
  Carpenter, 
  U.S.N.M., 
  No. 
  15453; 
  X 
  1. 
  

  

  2. 
  Protothaca 
  staminea 
  (Conrad) 
  97 
  

  

  Forma 
  orbella 
  Carpenter, 
  U.S.N.M., 
  No. 
  15453; 
  X 
  1^. 
  

  

  3. 
  Protothaca 
  staminea 
  (Conrad) 
  97 
  

  

  Forma 
  orbella 
  Carpenter, 
  U.S.N.M., 
  No. 
  15453; 
  X 
  1>4. 
  

   6, 
  7. 
  Pscphidia 
  salmonea 
  (Carpenter) 
  99 
  

  

  Enlargement 
  of 
  hinges 
  of 
  Figs. 
  8, 
  9. 
  

   8-10. 
  Pscphidia 
  salmonea 
  (Carpenter) 
  99 
  

  

  Syntype, 
  U.S.N.M., 
  No. 
  15578. 
  Length, 
  4 
  mm.; 
  height, 
  2.5 
  mm. 
  Central 
  large 
  

   spot 
  is 
  where 
  the 
  specimen 
  was 
  glued 
  to 
  glass. 
  

   11, 
  12. 
  Pscphidia 
  salmonea 
  (Carpenter) 
  99 
  

  

  Syntype, 
  Redpath 
  Mus., 
  No. 
  115; 
  X 
  16. 
  

   13. 
  "Venus 
  (Chione) 
  excavata" 
  Carpenter 
  99 
  

  

  Young, 
  Chione 
  undatella 
  Sowerby; 
  X 
  2. 
  Holotype, 
  British 
  Mus., 
  (Nat. 
  Hist.) 
  

   61.5.20.104. 
  Photo 
  Crown 
  copyright 
  reserve. 
  

  

  