﻿EXPLANATION 
  OF 
  PLATES 
  337 
  

  

  Plate 
  \2.—PETRIC0LA 
  AND 
  COOPERELLA 
  

  

  Figure 
  Page 
  

  

  1, 
  2. 
  Petricola 
  tellimyalis 
  (Carpenter) 
  100 
  

  

  Enlargement 
  of 
  hinges 
  of 
  Figs. 
  3-5. 
  

   3, 
  4, 
  5. 
  Petricola 
  tellimyalis 
  (Carpenter) 
  100 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  15554. 
  Length, 
  2.5 
  mm.; 
  height, 
  2 
  mm. 
  

   6, 
  7. 
  Cooperella 
  subdiaphana 
  (Carpenter) 
  101 
  

  

  Enlargement 
  of 
  hinges 
  of 
  Figs. 
  10-12. 
  

   8, 
  9. 
  Cooperella 
  subdiaphana 
  (Carpenter) 
  101 
  

  

  Enlargement 
  of 
  hinges 
  of 
  Figs. 
  13, 
  14. 
  

   10-12. 
  Cooperella 
  subdiaphana 
  (Carpenter) 
  101 
  

  

  Syntype, 
  C. 
  scintillaeformis 
  (Carpenter). 
  U.S.N.M., 
  No. 
  15669. 
  Length, 
  16mm.; 
  

   height, 
  12 
  mm. 
  ; 
  thickness 
  (double), 
  8 
  mm. 
  

   13, 
  14. 
  Cooperella 
  subdiaphana 
  (Carpenter) 
  101 
  

  

  Syntype, 
  C. 
  scintillaeformis 
  (Carpenter). 
  U.S.N.M., 
  No. 
  15669. 
  Length, 
  7 
  mm.; 
  

   height, 
  5.5 
  mm. 
  ; 
  thickness 
  (double)', 
  3-j- 
  mm. 
  

   15, 
  16. 
  Cooperella 
  subdiaphana 
  (Carpenter) 
  101 
  

  

  Holotype, 
  U.S.N.M., 
  No. 
  3563; 
  X 
  8. 
  

  

  