HOLOTRICHA 755 



— (1940) Nuclear variation in Paramecium caudatum. Ibid., 

 66:605. 



— (1942) Re-conjugation in Paramecium caudatum. Ibid., 70: 

 229. 



(1948) Nuclear behavior of Paramecium trichium during con- 



jugation. Ibid., 82:1. 

 (1949) An abbreviated conjugation process in Paramecium 



trichium. Biol. Bull., 97:331. 

 Dimitrowa, A.: (1928) Untersuchungen liber die iiberzahligen pul- 



sierenden Vakuolen bei Paramecium caudatum. Arch. Protist., 



64:462. 

 Dogiel, V.: (1926) Une nouvelle espece du genre Blepharocorys, B. 



bovis, etc. Ann. Parasitol., 4:61. 



(1930) Die prospektive Potenz der Syncaryonderivate an der 



Conjugation von Paraisotricha erlautert. Arch. Protist., 70: 

 497. 



Gelei, J. v.: (1934) Der feinere Bau des Cytopharynx von Para- 

 mecium und seine systematische Bedeutung. Ibid., 82:331. 



(1939) Das aussere Stiitzgerustsystem des Paramecium- 



korpers. Ibid., 92:245. 



(1939a) Neue Beitrage zum Bau und zu der Funktion des 



Exkretionssystems von Paramecium. Ibid., 92:385. 

 Gregory, Louise H.: (1909) Observations on the life history of 



Tillina magna. J. Exper. Zool., 6:383. 

 Hardin, G.: (1944) Symbiosis of Paramecium and Oikomonas. Ecol- 

 ogy, 25:304. 

 Hsiung, T. S.: (1930) Some new ciliates from the large intestine of 



the horse. Tr. Am. Micr. Soc, 49:34. 

 (1930a) A monograph on the Protozoa of the large intestine 



of the horse. Iowa State College J. Sc, 4:356. 

 Jennings, H. S.: (1938) Sex reaction types and their interrelations 



in Paramecium bursaria. I. Proc. Nat. Acad. Sc, 24:112. 

 Johnson, W. H. and Evans, F. R. : (1939) A study of encystment in 



the ciliate, Woodruffia metabolica. Arch. Protist., 92:91. 

 (1940) Environmental factors affecting cystment in 



Woodruffia metabolica. Physiol. Zool., 13:102. 



(1941) A further study of environmental factors af- 



fecting cystment in Woodruffia metabolica. Ibid., 14:227. 



and Larson, Enid: (1938) Studies on the morphology and 



life history of Woodruffia metabolica, n. sp. Arch. Protist., 90: 



383. 

 Kidder, G. W. and Claff, C. L.: (1938) Cytological investigations 



of Colpoda cucullus. Biol. Bull., 74:178. 

 Kirby, H. Jr.: (1934) Some ciliates from salt marshes in California. 



Arch. Protist., 82:114. 

 Koster, W. : (1933) Untersuchungen iiber Teilung und Conjugation 



bei Paramecium multimicronucleatum. Ibid., 80:410. 

 Kruszynski, J.: (1939) Mikrochemische Untersuchungen des 



veraschten Paramecium caudatum. Ibid., 92:1. 

 Lackey, J. B.: (1925) The fauna of Imhoff tanks. Bull. N. J. Agr. 



Exper. St., No. 417. 



