﻿Report 
  U. 
  S. 
  F 
  C. 
  1897. 
  (To 
  face 
  paee 
  340 
  ) 
  

  

  Plate 
  XIV. 
  

  

  Fig. 
  1, 
  PHOTO-MICROGRAPH 
  OF 
  THE 
  DIATOM, 
  SURIRELLA 
  GEMMA, 
  ENLARGED 
  ABOUT 
  1,600 
  

  

  DIAMETERS. 
  

  

  The 
  tip 
  of 
  tlie 
  frustule 
  is 
  alone 
  given, 
  to 
  indicate 
  the 
  cliaraeter 
  ami 
  texture 
  of 
  the 
  glassy 
  surface. 
  

  

  Fig. 
  2. 
  FOOD 
  OF 
  SOUTH 
  CAROLINA 
  OYSTER, 
  A 
  FEW 
  TYPICAL 
  ORGANISMS 
  ( 
  x 
  225). 
  

   Numbers 
  1 
  to 
  20 
  are 
  diatoms. 
  

  

  1-5, 
  Navieula 
  (Bory), 
  

  

  6, 
  N. 
  didyma 
  I 
  K, 
  ), 
  14, 
  Cyclotella 
  rotula 
  (E.) 
  

  

  7, 
  Pinnularia 
  radiosa 
  (?) 
  (K. 
  S.). 
  l.i, 
  Synedra 
  sj), 
  (E,l, 
  

  

  8, 
  Amphora 
  sp. 
  (K.). 
  16, 
  Diatonia 
  sp, 
  (De 
  C). 
  

  

  9, 
  Pleurosig:ina 
  fasciola 
  (E. 
  S.l. 
  17. 
  Cyinbella 
  sp. 
  (Ar.). 
  

   10. 
  P, 
  littorale 
  (S.1, 
  18, 
  Masto^'loia 
  smithii 
  (Th\v,i, 
  

   n, 
  P. 
  strigosum 
  (S.i. 
  19. 
  Triceratium 
  alternans 
  iBr. 
  

   12. 
  Aetinocyclusundulatus(K.). 
  Bai.), 
  

  

  13. 
  Coscinodiscus 
  radiatus(.E.). 
  20. 
  Bi<ldulphia 
  sp. 
  (Gr.). 
  

  

  ~1. 
  Grain 
  of 
  pine 
  pollen 
  (Pinus 
  

   rigida 
  ). 
  

  

  22. 
  Foraminifera 
  (Rotalia). 
  

  

  23. 
  Zoospore 
  (Ulva 
  y). 
  

  

  24. 
  Spicules, 
  

  

  (After 
  Bashford 
  Dean,) 
  

  

  