490 PRINCIPLES OF EMBRYOLOGY 



SJOSTRAND, F. s., A>fD HANZON, V., 1954. Exper. Cell Res., 7, 393. Membrane structures 

 of cytoplasm and mitochondria in exocrine cells of mouse pancreas as revealed by- 

 high resolution electron microscopy. 

 SLizYNSKi, B. M., 1950. JG, 50, 77. Chironomus versus Drosophila. 

 SMITH, s., 1946. JEB, 23, 357. Studies in the development of the rainbow trout (Salmo 



irideus). 

 SONNEBORN, T. M., 1947. Adv. Genet., i, 263. Recent advances in the genetics of Para- 

 mecium and Euplotes. 

 I95i<j. CSHS, 16, 483. Some current problems of genetics in the light of investigations 



of Chlamydomonas and Paramecium. 

 195 li. Sci. in Prog., 7, 167. Beyond the gene — tviro years later. 

 1954. Proc. 9tb cong. Genet, p. 307. Patterns of nucleo-cytoplasmic integration in 



Paramecium. 

 AND BEALE, G. H., 1949- Influence des g^nes, des plasmag^nes et du milieu dans le 

 d^terminisme des charact&res antigeniques chez Paramecium aurelia. In Unith biologiques 



donees de continuiti ghiitiqne, C.N.R.S., Paris. 

 SPEMANN, H., 1918. RA, 43, 448. Ueber die Determination der ersten Organanlagen des 

 Amphibien-embry o . 

 193 1. RA, 123, 389. Ueber den Anteil von Implantat und Wirtskeim an der Orien- 



tierung und BeschafFenheit der induzierten Embryonalanlage. 

 1938. Embryonic development and induction. Yale Univ. Press. 

 AND GEiNiTZ, B., 1927. RA, 109, 129. Ueber Weckung organisatorische Fahigkeiten 



durch Verpflanzung in organisatorische Umgebung. 

 AND MANGOLD, H., 1924. RA, 100, 599. Ueber Induktion von Embryonalanlagen 



durch Implantation artfremder Organisatoren. 

 AND schott6, o., 1932. Naturwiss., 20, 463. Ueber xenoplastische Transplantation als 

 Mittel zur Analyse der embryonalen Induktion. 

 SPIEGELMAN, s., 1945. Q. Rev. Biol., 20, 121. Physiological competition as a regulatory 

 mechanism in morphogenesis. 

 1948. SYMSEB, 2, 286. Differentiation as the controlled production of unique enzy- 

 matic patterns. 



1950. Modern aspects of enzymatic adaptation, Chap. 6 in The Enzymes, Acad. Press, 

 New York. 



195 1. CSHS, 16, 87. The particulate transmission of enzyme-forming capacity in yeast. 

 AND SUSSMANN, M., 1952. Ann. Rcv. Physiol., 14, 97. Energy metabolism of biosyn- 

 thesis at the cellular level. 



SPRATT, N. T., 1946. JEZ, 103, 259. Formation of the primitive streak in the explanted 

 chick blastoderm marked with carbon particles. 

 1947. JEZ, 104, 69. Regression and shortening of the primitive streak in the explanted 



chick blastoderm. 

 1952a. Ann. N. Y. Acad. 5ci., 55, 4. The chick embryo in biological research. The meta- 

 bolism of the early embryo. 

 19526. Anat. Rec, 113, 602. Differentiation in reducing enzyme systems in the early 

 chick blastoderm. 

 STAiGER, H. AND GLOOR, H., 1952. Chromosoma, 5, 221. Mitosehemmung und Polyploidie 



durch einen Lethalfaktor bei Dros. mel. 

 STEPHAN-DUBOis, F., 195 1. Annk Biol, 27, 734. Migrations et potentialites histog^netiques 

 des cellules indifferencies chez les Hydres, les Planaires et les Oligoch^tes. 



