1. Dusi, H., 1933a, Recherches sur la nutrition de quelques Euglènes I.Euglena gracilis. Ann. rinst. Pasteur50, 550–597.
2. —, 1933 b, Recherches sur la nutrition de quelques Euglènes. II.Euglena stellata, klebsii, anabaena, deses etpisciformis. Ibid.50, 840–890.
3. Esty, J. R. andCathcart, P. H., 1921, The change in hydrogen-ion concentration of various mediums during heating in soft and Pyrex glass tubes. Journ. Inf. Dis.29, 29–39.
4. Loefer, J. B., 1934, The trophic nature ofChlorogonium andChilomonas. Biol. Bull.66, 1–6.
5. —, 1935a, Effect of certain carbohydrates and organic acids on growth ofChlorogonium andChilomonas. Arch. f. Protistenk.84, 456–471.