516 FOOD REQUIREMENTS 



Provasoli, L. 1937a. La Nutrition carbonee du flagelle Folytoma uvella. C. R. 

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1937b. La Nutrition carbonee du flagelle Polytoma ocellatum. C. R. 



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1938a. La Nutrition carbonee de I'euglenien Astasia quartana (Moroff). 



C. R. Soc. Biol. Paris, 127: 51-53. 



1938b. Remarques sur la nutrition carbonee des eugleniens. C. R. Soc. 



Biol. Paris, 127: 190-92. 



1938c. Studi sulla nutrizione dei Protozoi. Boll. Lab. Zool. agr. Bachic. 



Milano, 9 (rpr.), 124 pp. 



Reich, K. 1935. The cultivation of a sterile amoeba on media without solid 

 food. J. exp. Zool., 69: 497-500. 



1936. Studies on the physiology of Amoeba. I. The relation between 



nutrient solution, zone of growth and density of population. Physiol. 

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1938. Studies on the physiology of Amoeba. IL The allelocatalytic 



effect in Amoeba cultures free of bacteria. Physiol. Zo51., 11: 347-58. 



Rottier, P. B. 1936a. Recherches sur les courbes de croissance de Polytoma 

 uvella. L'influence de I'oxygenation. C. R. Soc. Biol. Paris, 122: 65-68. 



1936b. Recherches sur la croissance de Polytoma uvella. L'influence de 



la concentration des substances nutritives. C. R. Soc. Biol. Paris, 122: 

 776-80. 



Schoenborn, H. W. 1936. Growth of two species of Astasia in relation to pH 

 of the medium. Anat. Rec, 67 (Suppl.) : 121. 



1938. Growth of Astasia sp. and Euglena gracilis in media containing 



inorganic nitrogen. Anat. Rec, 72 (Suppl.) : 51. 



1939. Growth of Euglena gracilis on inorganic nitrogen sources in the 



absence of light. Anat. Rec, 75 (Suppl.) : 151. 



1940. Studies on the nutrition of colorless euglenoid flagellates. L 



Utilization of inorganic nitrogen by Astasia in pure cultures. Ann. N. Y. 

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Woodrufl?, L. L. 1911. The effect of excretion products of Paramecium on its 

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1912. Observations on the origin and sequence of the protozoan fauna 



of hay infusions. J. exp. Zool., 12: 205-64. 



1913. The effect of excretion products of Infusoria on the same and 



on different species, with special reference to the protozoan sequence in 

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