664 ENDOMIXIS 



Kidder, G. W., and C. L. Claff. 1938. Cytological investigations of Colpoda 



cucullus. Biol. Bull., 74: 178-97. 

 Kidder, G. W., and W. F. Diller. 1934. Observations on the binary fission 



of four species of common free-living ciliates, with special reference to 



the macronuclear chromatin. Biol. Bull., 67: 201-19. 

 Kimball, R. F. 1937. The inheritance of sex at endomixis in Faramecium 



aurelia. Proc. Nat. Acad. Sci., Wash., 23: 469-74. 



1939. Change of mating type during vegetative reproduction in Vara- 



mecium aurelia. J. exp. ZooL, 81: 165-79- 



Klee, E. E. 1925. Der Formwechsel im Lebenskreis reiner Linien von Euplotes 



longipes. Zool. Jarhb., 42: 307-66. 

 MacDougal, M. S. 1936. Etude cytologique de trois espece du genre Chilodo- 



nella strand. Bull, biol., 70: 308-331. 

 Manwell, R. D. 1928. Conjugation, division, and encystment in Pleurotricha 



lanceolata. Biol. Bull. 54: 417-63. 

 Metalnikov, S. 1937. Le Role et la signification de la fecondation. Scientia, 



Milano, Mars, 1937: 167-76. 

 Moore, E. L. 1924. Endomixis and encystment in Spathidhnn spat hula. J. 



exp. Zool., 39: 317-37. 

 Parker, R. C. 1927. The effect of selection in pedigree lines of Infusoria. 



J. exp. Zool., 49: 401-39. 

 Sonneborn, T. M. 1937a. The extent of the interendomictic interval in 



Paramecium aurelia and some factors determining its variability. J. exp. 



Zool., 75: 471-502. 



1937b. Sex, sex inheritance and sex determination in Paramecium 



aurelia. Proc. Nat. Acad. Sci., 23: 378-385. 



1939a. Sexuality and related problems in Paramecium. Coll. Net, 14: 



77-84. 



1939b. Genetic evidence of autogamy in Paramecium aurelia. Anat. 



Rec, 75: 85. (Suppl.) 



1939c. Paramecium aurelia: mating types and groups; lethal interac- 

 tions; determination and inheritance. Amer. Nat., 73: 390-413. 



Spencer, H. 1924. Studies on a pedigree culture of Paramecium calkinsi. 

 J. Morph., 39: 543-551. 



Stein, F. R. 1859. Der Organismus der Infusionsthiere. I. Abth. Leipzig. 



Stranghoner, E. 1932. Teilungsrate und Kernreorganisationsprozess bei Para- 

 mecium multimicronucleatum. Arch. Protistenk., 78: 302-60. 



Summers, F. M. 1935. The division and reorganization of Aspidisca lynceus, 

 Diophrys appendiculata, and Stylonychia pustulata. Arch. Protistenk., 85: 

 173-208. 



Tittler, J. A. 1935. Division, encystment and endomixis in Urostyla grandis, 

 with an account of an amicronucleate race. Cellule, AA: 189-218. 



Turner, J. P. 1930. Division and conjugation in Euplotes patella, with special 



