MARINE ORGANISMS AND ENVIRONMENTAL INFLUENCES 297 



Nordli, E. 1957. Experimental studies on the ecology of Ceratia. Oikos, 

 8, (2), 201-265. 



Ostenfeld, C. Hansen. 1913. De danske farvandes plankton 1898-1901. 

 Phytoplankton og protozoer. I. Phytoplanktonets livskaar og 

 biologi, samt de i vore farvande iagttagne phytoplanktonters 

 optraeden og forekomst. K. Daftske Videnskrah. Selskah Naturv.- 

 Math. 9 (2), 113-478. 



Paasche, E. 1959. Fytoplanktonet og den biologiske bakgrunn for 

 primaerproduksjonen i Norskehavet i mai og juni 1954. Manu- 

 script, University of Oslo, Norway. 



Parke, M. 1959. Electron microscope observations on scalebearing 

 Chrysophyceae. IX Intern. Botan. Congr., Sec. 3. 



Provasoli, L. 1958. Growth factors in unicellular marine algae. Perspec- 

 tives in Marine Biology. Symposium 1956 at Scripps Institution of 

 Oceanography. A. A. Buzzati-Traverso, Editor. University of Cali- 

 fornia Press, Berkeley, Calif. 



Provasoli, L., and O. J. Pintner. 1953. Ecological implications of in vitro 

 nutritional requirements of algal flagellates. Ann. N.Y. Acad. Sci., 

 56 (5), 839-851. 



Provasoli, L., J. J. A. McLaughlin, and I. J. Pintner. 1954. Relative and 

 limiting concentrations of major mineral constituents for the growth 

 of algal flagellates. Trans. N. Y. Acad. Sci., Ser. 2, 16, (8), 412-417. 



Provasoli, L., J. J. A. McLaughlin, and M. R. Droop. 1957. The develop- 

 ment of artificial media for marine algae. Arch. Mikrobiol., 25, 

 392-428. 



Ramsfjell, E. 1954. Fytoplanktonet i den nordligste delen av Norskehavet 

 i begynnelsen av juni 1952 og 1953. Manuscript, University of 

 Oslo, Norway. 



Redfield, A. C. 1958. The inadequacy of experiment in marine biology. 

 Perspectives in marine Biology, A. A. Buzzati-Traverso, Editor. 

 University of California Press, Berkeley, Calif. 



Rodhe, W. 1948. Environmental requirements of fresh-water plankton. 

 Symbolae Botan. Upsalienses, 10 (1). 



Schreiber, E. 1927. Die Reinkultur von marinen Phytoplankton und 

 deren Bedeutung fiir die Erforschung der Produktionsfaihigkeit 

 des Meerwassers. Wiss. Meeresuntersuch. Abt. Helgoland, 16 (10), 

 1-34. 



Spencer, C. P. 1952. On the use of antibiotics for isolating bacteria-free 

 cultures of marine phytoplankton organisms. /. Marine Biol. Assoc. 

 United Kingdom 31 (1), 97-106. 



Steemann Nielsen, E. 1952. The use of radioactive carbon (C^^) 

 measuring organic production in the sea. /. conseil, Conseil per- 

 manent intern, exploration mer, 18, 117—140. 



. 1958a. Experimental methods for measuring organic production 



in the sea. Symposium on measurements of primary production in 



