55 



yS — Stein, Fr. Der Organismus der Infusionsthiere. Leipzig, 



1878. 

 '88 — Stokes, A. C. Preliminary Contribution toward a History of 



the Fresli-vvater Infusoria of the United States. Jnl. of the 



Trenton Nat. Hist. Soc, Vol. I. 1888. 

 '61 — Wrzesniowski, A. O. Observations sur quelques Infusoires. 



Ann. des Sci. Nat., ser. IV, torn. XVI. 1861. 



APPENDIX. 



DIATOMS FOUND IN THE SURFACE PLANKTON OF THE GULF. 



These diatoms, recorded by genera, were taken in great num- 

 bers. They are listed in the order of their relative abundance : 

 Coscinodiscus, (several species). Terpsonia. 

 Navicula, (several species). Gfammatophora. 



Melosira, (several species). Pleurosigma. 



Biddulphia. Surirella. 



Rhizosolenia. Triceratium. 



Nitzschia, (several species). Amphiphora. 



Chaetoceros. Actinoptychus. 



Synedra. Bacteriastrum. 



