COLLECTION, CULTIVATION, OBSERVATION 903 



(1950) Materials and methods in the study of Protozoa. 



Berkeley, California. 

 Klein, B. M.: (1926) Ergebnisse mit einer Silbermethode bei Cilia- 

 ten. Arch. Protist., 56:243. 

 Marsland, D. A.: (1943) Quieting Paramecium for the elementary 



student. Science, 98:414. 

 Mattes, O.: (1924) Ueber Chytridineen im Plasma und Kern von 



Amoeba sphaeronucleus und A. terricola. Arch. Protist., 47:413. 

 Needham, J. G., Galtsoff, P. S., Ltjtz, F. E. and Welch, P. S.: 



(1937) Culture methods for invertebrate animals. Ithaca, N. Y. 

 Pringsheim, E. G.: (1926) Kulturversuche mit chlorophyllflihr- 



enden Mikroorganismen. V. Beitr. Biol. PH., 14:283. 

 (1937) Beitrage zur Physiologie saprotropher Algen und 



Flagellaten. III. Planta, 27:61. 



(1946) Pure cultures of algae. Cambridge. 



Ratcliffe, H. L. and Geiman, Q. M.: (1938) Spontaneous and ex- 

 perimental amoebic infection in reptiles. Arch. Path., 25:160. 



Reyer, W.: (1939) Ueber die Vermehrung von Blastocystis in der 

 Kultur. Arch. Protist., 92:226. 



Sassuchin, D. N.: (1928) Zur Frage iiber die Parasiten der Proto- 

 zoen. Ibid., 64:61. 



, Popoff, P. P., Kudrjewzew, W. A. and Bogenko, W. P.: 



(1930) Ueber parasitische Infektion bei Darmprotozoen. Ibid., 

 71:229. 



Spingarn, C. L. and Edelman, M. H.: (1947) The prolongation of 

 the viability of cultures of E. histolytica by the addition of 

 streptomycin. J. Parasitol., 33:416. 



Stowell, R. E.: (1945) Feulgen reaction for thymonucleic acid. 

 Stain Tech., 20:45. 



Taylor, C. V. and Van Wagtendonk, W. J.: (1941) Growth studies 

 of Colpoda duodenaria. I. Physiol. Zool., 14:431. 



Tobie, Eleanor J., von Brand, T. and Mehlman, B.: (1950) Cul- 

 tural and physiological observations on Trypanosoma rhode- 

 siense and T. gambiensc. J. Parasitol., 36:48. 



Trager, W. : (1934) The cultivation of a cellulose-digesting flagel- 

 late, Trichomonas termopsidis, and of certain other termite 

 Protozoa. Biol. Bull., 66:182. 



(1950) Studies on the extracellular cultivation of an intra- 

 cellular parasite (avian malaria). I. J. Exper. Med., 92:349. 



Wenrich, D. H.: (1941) The morphology of some Protozoan para- 

 sites in relation to microtechnique. J. Parasitol., 27:1. 



Wenyon, C. M.: (1926) Protozoology. London and Baltimore. 



Wichterman, R. : (1949) The collection, cultivation, and steriliza- 

 tion of Paramecium. Proc. Perm. Acad. Sc, 23:151. 



