BIBLIOGRAPHY AND AUTHOR-INDEX 429 



SANSOME, F. w., and PHILP, J. 1932. Recent Advances in plant genetics. 



London. 64, 92, 258 

 SATO, H. 1932. Die postembryonale Diiferenzierung der Gonaden von 



Lymantria dispar. Z. Zellf. mikr. Anat. 16. 228 

 SAUNDERS, E. R. 1928. Matthiola. Bibliog. Gen. 55 

 SAX, K. 1930. Chromosome structure and the mechanism of crossing over. 



J. Arnold Arboretum. 2. 121, 126 

 1 93 1. The mechanism of crossing over. Science 7 A. 121, 126 



1936. Chromosome coiUng in relation to miosis and crossing over. Gen. 

 21. 129 



1937. Effects of variations in temperature on nuclear and cell division in 

 Iradescantia. Am. J. Bot. 2U. 255 



SCHLEIP, w. 1929. Die Determination der Primitiventwicklung. Leipzig. 



I37> 139. I47» 278 

 SCHMIDT, w. J. 1936. Doppelbrechung von Chromosomen imd Kemspindel 



in der lebenden Zelle. Naturmss. 24. 395, 363 

 1937. Die Doppelbrechung von Karyoplasma, Zytoplasma und Meta- 



plasma. Berlin. 363, 395 

 SCHRADER, F. 1928. The sex chromosomes. Berlin. 75 



and HUGHES-SCHRADER, s. 1931. Haploidy in Metazoa. Q. Rev. Biol. 6. 



229 

 SCHULTZ, J. 1929. The minute reaction in the development of D. melanogaster. 



Gen.M*r. 186 



1934. See Morgan, Bridges, and Schultz. Yearb. Cam. Inst. 33. 164 



1935. Aspects of the relation between genes and devlopment in Droso- 

 phila. Am. Nat. 69. 175 



1936. Variegation in Drosophila and the inert chromosome regions. 

 P.N.A.S. 22. 373 



and BRIDGES, c. b. 1932. Methods for distinguishing between duplica- 

 tions and specific suppressors. Am. Nat. 66. 95, 160 

 SCHULTZ and REDFIELD, sec Morgan, Bridges, and Sturtevant. 1932, 1933. 



The constitution of germinal material in relation to heredity. Yearb. 



Cam. Inst. 31, 32. 126 

 SCHWEITZER, M. D. 1935. Analytical Study of crossing over in D. we/ano^a5fer. 



Gen. 20. 92 

 SCOTT, J. p. 1937. The embryology of the guinea-pig IIL The development 



of the polydactylous monster. J. Exp. Zool. 77. 203 

 SCOTT-MONCRIEFF, R. 1936. A biochemical survey of some mendelian factors 



for flower colour. J. Gen. 32. 175 

 1937- The biochemistry of flower colour variation. In Perspectives in 



Biochemistry. Cambridge. 175 

 SEIDEL, F. 1936. Entwicklungsphysiologie des Insekten-Keimes. Verh. d. 



Deutsch. Zool. Ges. 143 

 SEXTON, E. w., and pantin, c. f. a. 1927. Inheritance in Gammarus chevreuxi. 



Nar. 119. 281 

 SHULL, A. F. 1929. Determination of types of individuals in aphids, rotifers, 



and cladocera. Biol. Rev. 4. 60 

 siNNOTT, E. w., and DUNN, L. c. 1935- The effect of genes on the development 



of size and form. Biol. Rev. 10. 207, 318 

 SIRKS, M. J. 1932. Beitrage zu einer genotypischen Analyse der Ackerbohne. 



Genetica 13. 278 

 SMITH, H. F. 1936. Influence of temperature on crossing over in Drosophila. 



Nat. 138. 94 



