340 THE THEORY OF THE GENE 



1919. The construction of chromosome maps. Proc. Soc. Exp. Biol. 



and Med. XVI. 



— 1919. The origin of gynandromorphs. Carnegie Inst. Wash. No. 278. 

 1919. The inheritance of a fluctuating character. Jour. Gen. Physiol. I. 



Morgan, T. H., Bridges, C. B., and Sturtevant, A. H. 1925. The genetics of 



Drosophila. Bibliogr. Genetica, II. 

 Morgan, T. H., and Cattell, E. 1912. Data for the study of sex-linked 



inheritance in Drosophila. Jour. Exp. Zool. XIII. 



1913. Additional data for the study of sex-linked inheritance in Droso- 

 phila. Ibid. XIV, 



Morgan, T. H., and Lynch, C. J. 1912. The linkage of two factors in Droso- 

 phila that are not sex-linked. Biol. Bull. XXIII. 



Morgan, T. H., and Plough, H. H. 1915. The appearance of known muta- 

 tions in other mutant stocks. Amer. Nat. XLIX. 



Morgan, T. H.; Sturtevant, A, H.; and Bridges, C. B. 1920. The evidence 

 for the linear order of the genes. Proc. Nat. Acad. Sc. VI. 



Morgan, T. H.; Sturtevant, A. H.; Muller, H. J.; and Bridges, C. B. 

 1915. 2d ed. 1923. The mechanism of Mendelian heredity. New York. 



Morrill, A. W. 1903. Notes on some Aleurodes from Massachusetts, with 

 descriptions of new species. Mass. Agr. Exp. Sta., Tech. Bull. I. 



Morrill, A. W., and Back, E. A. 1911. White flies injurious to citrus in 

 Florida. U. S. Dept. Agr., Bureau Ent., Bull. 92. 



MOUNCE, I. 1921. IlomothaUism and the production of fruit-bodies by 

 monosporous myeelia in the genus Coprinus. Trans. Brit. Mycolog. Soc, 

 VII. 



Muller, H. J. 1914. A geue for the fourth chromosome of Drosophila. Jour. 



Exp. Zool. XVII. 



1916. The mechanism of crossing over. Amer. Nat. L. 



1917. An Oenothera-like case in Drosophila. Proc. Nat. Acad. Sc. III. 



1918. Genetic variability, twin hybrids and constant hybrids, in a case 



of balanced lethal factors. Genetics. III. 



1920. Are the factors of heredity arranged in a line? Amer. Nat. LIV. 



Nachtsheim, H. 1912. Parthenogenese, Eireifung und Geschlechtsbestim- 

 mung bei der Honigbiene. Sitzungs d. Gesell. f. Morph. u. Phys. in 

 Miinchen. 



1913. Cytologische Studien iiber die Geschlechtsbestimmung bei der 



Honigbiene (Apis mellifica L.). Arch. Zellf. XI. 



1914. Das Problem der Geschlechtsbestimmung bei Dinophilus, Berich. 



d. Naturf, Gesell, z. Freiburg i. Br. XXI. 



- - 1920. Crossing-over-Theorie oder Eeduplikationshypothese? Zeit. Abst.- 



Vererb. XXII. 

 1921. Sind haploide Organismen (Metazoen) lebensfahig? Biol. Zen- 



tralb. XLI. 

 Nawaschin, M. 1925. Morphologische Kernstudien der Crepis-Arten in 



bezug auf die Artbildung. Zeit. f. Zellf. u. mikr. Anat. II. 

 Nawaschin, S. 1912. On the dimorphism of the nuclei in the somatic cells 



of Galtonia Candicana. Bull. Acad. Imper. Sc. Petersbourg, XXII. (Eus- 



sian.) 

 1915. Hetero- and idiochromosomes of the plant's nucleus as the cause 



