58 Phylum Protozoa 



II. Euglena stellata, klebsii, anabaena, deses et piscijormis. Ibid. 50:840. 

 Elliott, A. M. 1933. Isolation of Colpidium striatum Stokes in bacteria-free 



cultures and the relation of growth to pH of the medium. Biol. Bull. 65:45. 

 1935- Effects of carbohydrates on growth of Colpidium. Arch. j. Protist. 



84:156. 



1935a. Effects of certain organic acids and protein derivatives on the growth 



of Colpidium. Ibid. 84:472. 

 Geise, A. C, and Taylor, C. V. 1935. Paramecium for experimental purposes in 



controlled mass cultures on a single strain of bacteria. Ibid. 84:225. 

 Glaser, R. W. 1932. Cultures of certain Protozoa, bacteria-free. J. Parasit. 19:23. 

 Glaser, R. W., and Coria, N. A. 1930. Methods for the pure culture of certain 



Protozoa. J. Exper. Med. 51:787. 



1933- The culture of Paramecium caudatum free from living micro- 

 organisms. J. Parasit. 20:33. 



1935- The culture and reactions of purified Protozoa. Amer. J. Hyg. 



21:111. 

 Hall, R. P. 1933. On the relation of hydrogen-ion concentration to the growth 



of Euglena anabaena var. minor and E. deses. Arch. f. Protist. 79:239. 

 Hetherington, A. 1934. The sterilization of Protozoa. Biol. Bull. 67:315. 

 Jahn, T. L. 1931. Studies on the physiology of the euglenoid flagellates. 



III. The effect of hydrogen-ion concentration on the growth of Euglena gracilis 

 Krebs. Ibid. 61: 387. 



1933- Studies on the oxidation-reduction potential of protozoan cultures. 



I. The effect of pH on Chilomonas Paramecium. Proto plasma 20:90. 



Johnson, D. F. 1936. The isolation of Glaucoma ficaria Kahl in bacteria-free 

 cultures, and growth in relation to pH of the medium. Arch. f. Protist. 86:263. 



1936a. Growth of Glaucoma ficaria Kahl in cultures with single species 



of other micro-organisms. Ibid. 86:359. 



Loefer, J. B. 1934. The trophic nature of Chlorogonium and Chilomonas. Biol. 

 Bull. 66:1. 



1935- Relation of hydrogen-ion concentration to growth of Chilomonas 



and Chlorogonium. Arch. /. Protist. 85:209. 



1936. A simple method for the maintenance of pure-line mass cultures of 



Paramecium caudatum on a single species of yeast. Trans. Amer. Micr. Soc. 



55:255- 



1936a. Isolation of a bacteria-free strain of Paramecium bursaria and con- 



centration of the medium as a factor in growth. (Submitted for publication.) 

 Luck, J. M., and Sheets, G. 1931. The sterilization of Protozoa. Arch. f. Protist. 



75:255. 

 Luck, J. M., Sheets, G., and Thomas, J. O. 1931. The role of bacteria in the 



nutrition of Protozoa. Quart. Rev. Biol. 6:46. 

 Lwoff, A. 1929. Milieux de culture et d'etretien pour Glaucoma piriformis (Cilie) . 



C. R. Soc. Biol. 100:635. 

 — 1932. Recherches biochimiques sur la nutrition des Protozoaires. Le pou- 



voir synthese. Monographies de I'Institut Pasteur (Paris, Masson et Cie.), 158 pp. 

 Lwoff, A., and Dusi, H. 1929. Le pouvoir synthese d'Euglena gracilis cultivee 



a l'obscurite. C. R. Soc. Biol. 102:567. 

 Lwoff, M., and Lwoff, A. 1929. Le pouvoir de synthese de Chlamydomonas 



agloejormis et d'Haematococcus pluvialis. Ibid. 102:569. 

 Mast, S. O., and Pace, D. M. 1933. Synthesis from inorganic compounds of starch, 



fats, proteins and protoplasm in the colorless animal, Chilomonas Paramecium. 



Protoplasma 20:326. 



