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. 1914. tJber Parthenogenesis der Infusorien und die Depressionszustande 



der Protozoen. Biol. 2,entr., 34, 557. 



Hiwatashi, K. 1949a. Studies on the conjugation of Faraviechnii caiidamvi. I. 

 Mating types and groups in the races obtained in Japan. Sci. Repts. 

 Tohoku Univ., Biol., 18, 137. 



. 1949b. Studies on the conjugation of Parmiieciinii caiidatinn. II. Induc- 

 tion of pseudoselfing pairs bv formahn killed animals. Sci. Repts. Tohoku 

 Univ., Biol, 18, 141. 



. 1950. Studies on the conjugation of Paranieciinn caiidatuiii. III. Some 



properties of the mating type substances. Sci. Repts. Tohoku Univ., Biol., 

 18, 270. 



. 1951a. Studies on the conjugation of FaraTiiecium caudatinn. IV. Con- 

 jugating behavior of individuals of two mating types marked by a vital 

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1951b. A new method for separating animals of one mating type from 



their partners in a conjugating mixture of Faranieciuni. Annot. Xool. 



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 Horstadius, S. 1939. Uber die Entwicklung von Astropecten aranciacus L. 



Fubbl. staz. zool. Napoli, 17, 222. 

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Fhysiology of Frotozoa, 1, 27. Academic Press, New York. 

 Jacobson, W. E. 1948. Non-mating-type-specific "activation" in Faranieciinn 



aurelia: induction of macronuclear breakdown in sensitive stock P of 



variety 1 by killer stock G of variety 2. Anat. Record, 101, 708. 

 Jakus, M. A., and C. E. Hall. 1946. Electron microscope observations of the 



trichocysts and cilia of Faraineciiini. Biol. Bull., 91, 141. 

 Jennings, H. S. 1911. Assortive mating, variability and inheritance of size in 



the conjugation of Faraineciwn. J. Exptl. Z,ool., 11, 1. 

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saria. I. Froc. Natl. Acad. Sci., U. S., 24, 112. 

 . 1939a. Fara7ueciti7/i bursaria: mating types and groups, mating behavior, 



self-sterility; their development and inheritance. Am. Naturalist, 73, 



414. 

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Naturalist, 73, 385. 

 Jennings, H. S., and P. Opitz. 1944. Genetics of Faramecijim bursaria. IV. A 



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



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 Katashima, R. 1952. Studies on Euplotes. I. Conjugation and cytogamv induced 



by split pair method in Euplotes harpa. J. Sci. Hiroshima Univ., ser. B, 



13, 111. 

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

 . 1941. Double animals and amicronucleate animals in Euplotes patella 



with particular reference to their conjugation. /. Exptl. "Zool., 86, 1. 



