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 the frustule is alone giveu, to imlicate the character and 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. Navicula (Bory). .- r— ,, . , t. ^ 



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



r. Pinnuiaria radiosa (?) (K.S.). 15. Syuedra sp. (E.i. 



8. Amphora sp. (K.). 16. Diatoma sp. ( De C). 



9. Pleurosigma fasciola (E. S.). IT. Cymbella sp. ( Ag.i. 



10 P. littorale (S. ). IS. Mastogloia smithii fThw.^. 



11. P. strigosum (S. *. 19. Triceratium alternans (Br 



12. Actinocyclusundulatus(K.). Bai.). 



1.3. Coseinodiscusradiatus(E.). 30. Biddulphia sp. (Gr.). 



21. Grain of pine pollen (Pmus 



rigida). 

 2-2. Foraminifera (Rotaha). 

 2.3. Zoospore (Ulva ?). 

 24. Spicules. 



(After Bashford Dean.) 



