VARIATION AND HEREDITY 245 



Moewus, F.: (1933) Untersuchungen ueber die Variabilitat von 



Chlamydomonaden. Arch. Protist., 80:128. 

 (1934) Ueber Dauermodifikation bei Chlamydomonaden. 



Ibid., 83:220. 

 (1935) Ueber die Vererbung des Geschlechts bei Polytoma 



pascheri und bei P. uvella. Ztschr. Induk. Abst.-u. Vererb., 69: 



374. 



(1936) Faktorenaustausch, insbesondere der Realisatoren 



bei Chlamydomonas-Kreuzungen. Ber. deutsch. Bot. Ges., 54: 



45. 

 (1938) Vererbung des Geschlechts bei Chlamydomonas eu- 



gametos und verwandten Arten. Biol. Zentralbl., 58:516. 

 Piekarski, G.: (1949) Blepharoplast und Trypaflavinwirkung bei 



Trypanosoma brucei. Zentralbl. Bakt., I. Orig., 153:109. 

 Powers, E. L.: (1943) The mating types of double animals in Eu- 



plotes patella. Am. Midi. Natur., 30:175. 

 Preer, J. R. Jr.: (1948) The killer cytoplasmic factor kappa: its 



rate of reproduction, the number of particles per cell, and its 



size. Am. Nat., 82:35. 

 (1948a) Microscopic bodies in the cytoplasm of "killers" 



of Paramecium aurelia and evidence for the identification of 



these bodies with cytoplasmic factor, kappa. Genetics, 33:625. 

 (1950) Microscopically visible bodies in the cytoplasm of 



the "killer" strain of Paramecium aurelia. Ibid., 35:344. 



Reynolds, B. D. : (1924) Interactions of protoplasmic masses in rela- 

 tion to the study of heredity and environment in Arcella poly- 

 pora. Biol. Bull., 46:106. 



Root, F. M.: (1918) Inheritance in the asexual reproduction in 

 Centropyxis aculeata. Genetics, 3:173. 



Sapiro, J. J., Hakansson, E. G. and Louttit, C. M.: (1942) The 

 occurrence of two significantly distinct races of Entamoeba his- 

 tolytica. Am. J. Trop. Med., 22:191. 



Schroder, B.: (1914) Ueber Planktonepibionten. Biol. Zentralbl., 

 34:328. 



Sonneborn, T. M. : (1937) Sex, sex inheritance and sex determina- 

 tion in Paramecium aurelia. Proc. Nat. Acad. Sc, 23:378. 



(1939) Paramecium aurelia: mating types and groups; etc. 



Am. Nat., 73:390. 



— (1942) Inheritance in ciliate Protozoa. Ibid., 76:46. 



(1943) Gene and cytoplasm. I, II. Proc. Nat. Acad. Sc, 29: 



329. 



(1946) Experimental control of the concentration of cyto- 

 plasmic genetic factors in Paramecium. Cold Springs Harbor 

 Symp. Quant. Biol., 11:236. 



(1947) Recent advances in the genetics of Paramecium and 



Euplotes. Adv. Genetics, 1:263. 



(1948) Introduction to symposium on plasmagenes, genes 



and characters in Paramecium aurelia. Am. Nat., 82:26. 

 (1950) The cytoplasm in heredity. Heredity, 4:11. 



