BIBLIOGRAPHY 116 



3* Darlington, C. D. 1936. Recent Advances in Cytology. 

 (Second Edition.) London. 



*' 1930. Crossing-Over and its Mechanical relation- 

 ships in Chorthipptis and Stauroderus. J. Genet. y 33, 

 465. 



^8 1936. The Internal Mechanics of the Chromo- 

 somes. V. Relational coiling of the chromatids at 

 mitosis. Cytologia, 7, 248. 



^* Darlington, C. D., and Dark, S. O. S. The origin and 

 behaviour of chiasmata. II. Stenohothrus parallelus. 

 Cytologia, 3, 169. 



*** Dearing, W. H. 1934. The material continuity and 

 individuality of the somatic chromosomes of Ambly- 

 stoma tigrinum with special reference to the nucleolus 

 as a chromosomal component. J. Morph., 56, 157. 



*^ Dobzhansky, Th. 1934. Studies on hybrid sterility. 

 I. Spermatogenesis in pure and hybrid Drosophila 

 pseudo-obscura. Z. Zellf., 21, 169. 



*2 1935. Drosophila 7nira7ida, anew sipocies. Genetics^ 



20, 377. 



*3 Dobzhansky, Th., and Tan, C. C. 1936. Studies on 

 hybrid sterility. III. A comparison of the gene 

 arrangement in two species, Drosophila pseudo-obscura 

 and Drosophila miranda. Z. ind. Abst. u. Vererbl., 

 72, 88. 



** DouTRELiGNE, J. 1933. Chromosomes et nucleoles dans 

 les noyaux du type euehromocentrique. Cellule, 42, 31. 



*^ DozoRCHEVA, R. L. 1936. The morphology of chromo- 

 somes in the Ichneumon, Pteromalus puparum. C. R. 

 Acad. Sci., U.R.S.S., 1936 (3). 



** Dubinin, N. P., and others. 1936. Occurrence and 

 distribution of chromosome aberrations in nature. 

 Nature, 137, 1035. 



*' Du Bois, A. M. 1933. Chromosome behaviour during 

 cleavage in the eggs of Sciara coprophila (Diptera) in 

 relation to the problem of sex-determination. Z. Zellf. t 

 19, 595. 



*^ DusTiN, A. p. 1921. Deolenchement experimental 

 d'une onde cinetique par injection intraperitoneale de 

 serum. C.R. Soc. Biol., 85, 23. 



*' Emmens, C. W. Unpublished work. 



^^ Ernst, A. 1918. Bastardierung als Ursache der Apogamie 

 im Pflanzenreich. Eine Hypothese zur experimentelle 

 Vererbungs- und Abstammungslehre. Jena. 



*^ Fasten, N. 1914. Spermatogenesis of the American 

 Crayfish, Cambarus virilis and Cambanis immunis (?) 

 with special reference to synapsis and the chromatoid 

 bodies. J. Morph., 25, 587. 



