320 PROTOZOA 



Jennings, H. S. 1944d. Paramecium bursaria: Life history. IV. Rela- 

 tion of inbreeding to mortality of exconjugant clones. /. Exptl Zool, 

 97, 165. 



Jennings, H. S. 1945. Paramecium bursaria: Life history. V. Some 

 relations of external conditions, past or present, to ageing and to 

 mortality of exconjngants, with summary of conclusions on age and 

 death. /. Exptl Zool, 99, 15. 



Jennings, H. S., and P. Opitz. 1944. Genetics of Paramecium bursaria. 

 IV. A fourth variety from Russia. Lethal crosses with an American 

 variety. Genetics, 29, 576. 



Johnson, M. 1955. Viability of Inbred and Outbred Paramecium cau- 

 datum. Thesis, University of Durham, England. 



Johnson, W. H. 1952. Further studies on the sterile culture of Parame- 

 cium. Physiol Zool, 25, 10. 



Jollos, V. 1916. Die Fortpflanzung der Infusorien und die potentielle 

 Unsterblichkeit der Einzelligen. Biol Zentr., 36, 497. 



Katashima, R. 1952. Studies on Euplotes. I. Conjugation and cytogamy 

 induced by split pair method in Euplotes harpa. J. Sci. Hiroshima 

 Univ. Ser. B, Div. 1, 13, 111. 



Kay, M. W. 1946. Studies on Oxytricha bifaria. III. Conjugation. Trans. 

 Am. Microscop. Soc, 65, 131. 



Kimball, R. F. 1939. Mating types in Euplotes. Am. Naturalist, 73, 451. 



Kimball, R. F. 1942. The nature and inheritance of mating types in 

 Euplotes patella. Genetics, 27, 269. 



Kimball, R. F. 1943. Mating types in the ciliate Protozoa. Quart. Rev. 

 Biol, 18, 30. 



Kirby, H. 1949. Systematic differentiation and evolution of Flagellates 

 in Termites. Rev. soc. mex. hist, nat., 10, 57. 



Lederberg, J. 1955. Genetics and microbiology. In Perspectives and 

 Horizons in Microbiology, S. A. Waksman, editor. Rutgers Univer- 

 sity Press, New Brunswick, New Jersey, p. 24. 



Lee, II. 1949. Change of mating type in Paramecium bursaria follow- 

 ing exposure to X-rays. /. Exptl. Zool, 112, 125. 



Levine, M. 1953. The interaction of nucleus and cytoplasm in the iso- 

 lation and evolution of species of Paramecium. Evolution, 7, 366. 



Margolin, P. 1956a. An exception to mutual exclusion of the ciliary 

 antigens in Paramecium aurclia. Genetics, 41, 685. 



Margolin, P. 1956b. The ciliary antigens of stock 172, Paramecium 

 aurclia, variety 4. /. Exptl. Zool, 133, 345. 



