SUGGESTED READING 255 



Sax, K. An analysis of X-ray induced cliromosomal abcrnitions in Tradcscantia. 



Genetics 25: 41-68, 1940. 

 ScHULTZ, J. The evidence of tiic nucleoprotein nature of (he nene. Cold Spring 



Harbor Symposi-a on Quant. Biol. 9: 55-65, 1941. 

 Sparrow, A. H. The structure and development of the chromosome spirals in 



microspores of Trillium. Canad. Jour. Res. 20: 257-266, 1942. 

 Warmke, H. E. Cliromosome continuity and individuality. Cold Spring Harbor 



Symposia on Quant. Biol. 9: 1-6, 1941. 



VIII. Meiosis 



Darlington, C. D. Recent Advances in Cytology. 2d ed. New York, 1937. 

 KxJWADA, Y. Studies of mitosis and meiosis in comparison, I. Cylologia 11 : 217-244, 



1940. 

 Marshak, a. The effect of X-rays on chromosomes in different stages of meiosis. 



Jour. Gen. Physiol. 19: 179-198, 1935. 

 Nebel, B. R. Chromosome structure. X. Genetics 21: 605-614, 1936. 

 Oehlkers, F. Die zytologischen Grundlagen des genetischen "crossing-over." 



Ber. Deu. Bot. Gesell. 55: (96)-(118), 1937. 

 S.-vx, K., and L. 'SI. Humphrey. Structure of meiotic chromosomes in microsporo- 



genesis of Tradescantia. Bot. Gazette 96: 353-362, 1934. 

 ScHRADER, F. The structure of the kinetochore at meiosis. Chromosonia 1: 230- 



237, 1939. 

 Wilson, G. B., and C. L. Huskins. Chromosome and chromonema length during 



meiotic coiling in Trillium erectum L. Ann. Botany 3 : 257-270, 1939. 



IX. Reproduction in Animals 



Agar, W. E. Cytology. London, 1920. 



Calkins, G. X. The Biology of the Protozoa. Philadelphia and X'^ew York, 1926. 



, and F. M. Summers. Protozoa in Biological Research. New York, 1941. 



Cleveland, L. R., with collaboration of S. R. Hall, Elizabeth P. Sanders, and 



Jane Collier. The wood-feeding roach Cryptocercus, its protozoa, and the 



symbiosis between protozoa and roach. Mem. Arner. Acad. Arts Sci. 17: 185- 



342, 1934. 

 Cleveland, L. R. Origin and development of the achromatic figure. Biol. Bull. 



74:41-55, 1938. 

 Doncaster, L. An Introduction to the Study of Cytologj'. Caml^ridge (England) 



1920. 

 Gray, J. A Textbook of Experimental Cytology. Cambridge (P^ngland), 1931. 

 Hegner, R. W. The Germ-cell Cycle in Animals. New York, 1914. 

 Jennings, H. S. Chromosomes and cytoplasm in protozoa. In The Cell and 



Protoplasm. Lancaster, Pa., 1940. • 



KoFOiD, C. A. Cell and organism. In The Cell and Protoplasm. Lancaster, Pa., 



1940. 

 Wenrich, D. H. Chromosomes in protozoa. The Collecting N^et (Woods Hole) 



15 : Xo. 6, 1940. 

 Wilson, E. B. The Cell in Development and Heredity. 3d ed. Xew York, 1925. 



X. Reproduction in Angiosperms 



Coulter, J. AT., and C. J. Chamberlain. Morphology of Angiosperms. X^ew York, 



1909. 

 Ernst, A. Bastardierimg als Ursache der Apogamie im Pflanzenreich. Jena, 1918. 



