218 PROTOZOOLOGY 



Ivanic, M. : (1934) Ueber die Ruhestadienbildung und die damit am 

 Kernapparate verbundenen Veranderungen bei Lionotus cygnus. 

 Zool.Anz., 108:17. 



(1938) Ueber die mit der Chromosomenbildung verbundene 



promitotische Grosskernteilung bei den Vermehrungsruhe Sta- 

 tien von Chilodon uncinatus. Arch. Protist., 91:61. 



Jameson, A. P.: (1920) The chromosome cycle of gregarines with 

 special reference to Diplocystis schneideri. Quart. J. Micr. Sc, 

 64:207. 



Jennings, H. S.: (1929) Genetics of the Protozoa. Bibliogr. Gen., 5: 

 105. 



— ■ (1938) Sex relation types and their inheritance in Parame- 

 cium bursaria. I. Proc. Nat. Acad. Sc, 24:112. 



(1939) Genetics of Paramecium bursaria. I. Genetics, 24:202. 



(1941) II. Proc. Am. Philos. Soc, 85:25. 



(1942) III. Genetics, 27:193. 



(1942a) Senescence and death in Protozoa and invertebrates. 



E. V. Cowdry's Problems of ageing. 2 ed. Baltimore. 



(1944) Paramecium bursaria: Life history. I. Biol. Bull., 86: 



131. 



■ (1944a) II. J. Exper. Zool., 96:17. 



and Opitz, Pauline: (1944) Genetics of Paramecium bur- 

 saria. IV. Genetics, 29:576. 



Raffel, D., Lynch, R. S. and Sonneborn, T. M.: (1932) 



The diverse biotypes produced by conjugation within a clone of 



Paramecium aurelia. J. Exper. Zool., 62:363. 

 Jickeli, C. F.: (1884) Ueber die Kernverhaltnisse der Infusorien. 



Zool. Anz., 7:491. 

 Johnson, W. H. and Evans, F. R.: (1940) Environmental factors 



affecting encystment in Woodruffia metabolica. Physiol. Zool., 



13:102. 

 — — — (1941) A further study of environmental factors af- 

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

 Kater, J. M. and Burroughs, R. D.: (1926) The cause and nature 



of encystment in Polyiomella citri. Biol. Bull., 50:38. 

 Kay, M. M.: (1946) Studies on Oxytricha bifaria. III. Tr. Am. Micr. 



Soc, 65:132. 

 Kidder, G. W. : (1933) Studies on Conchophthirus mytili de Morgan. 



I. Arch. Protist., 79:1. 

 (1938) Nuclear reorganization without cell division in Para- 



clevelandia simplex, etc. Ibid., 91:69. 

 and Claff, C. L.: (1938) Cytological investigations of Gol- 



poda cucullus. Biol. Bull., 74:178. 

 and Diller, W. F. : (1934) Observations on the binary fission 



of four species of common free-living ciliates, etc Ibid., 67:201. 

 and Stuart, C. A.: (1939) Growth studies on ciliates. II. 



Physiol. Zool., 12:341. 

 and Summers, F. M.: (1935) Taxonomic and cytological 



studies on the ciliates associated with the amphipod family, etc. 



Biol. Bull, 68:51. 



