348 THE THEORY OF THE GENE 



1923. Nouvelles recherehes sur la sexualite des Basidiomycetes. Bull. 



Soc. Eoyale d. Bot. d. Belgique, XVI. 

 De la Vaulx. 1919. L 'intersexualite chez un crustace cladoeere Daphne 



atkinsoni. Baird. Compt. rend. Acad. d. Sc. CLXIX. 

 DE Vries, H. 1901-1903. Die Mutationstheorie. Leipzig. 

 ■ 1905. Species and varieties; their origin by mutation. Chicago. 



1907. Plant-breeding; comments on the experiments of Nilsson and 



Burbank. Chicago. 



1907. On twin hybrids. Bot. Gaz. XLIV. 



1908. Bastarde von Oenothera gigas. Ber. Deutsch. Bot. Gesell. XXVIa. 



1908. tjber die Zwillingsbastarde von Oenothera nanella. Ibid. XXVI. 



1909. On triple hybrids. Bot. Gaz. XL VII. 



1910. Intracellular Pangenesis. Trans. 



1911. tJber doppeltreziproke Bastarde von Oenothera biennis und O. 



muricata. Biol. Centralb. XXXI. 



— 1913. Gruppenweise Artbildung. Berlin. 



— 1914. The probable origin of Oenothera Lamarckiana Ser. Bot. Gaz. 

 LVII. 



— 1915. Oenothera gigas nanella, a Mendelian mutant. Hid. LX. 



1916. New dimorphic mutants of the Oenotheras. Hid. LXII. 



1924. On physiological chromomeres. La Cellule. XXXV. 



DE Veies, H., and Boedijn, K. 1923. On the distribution of mutant charac- 

 ters among the chromosomes of Oenothera Lamarckiana. Genetics. VIII. 



1924. Double chromosomes of Oenothera Lamarckiana semigigas. Bot. 



Gaz. LXXVIII. 



Walton, A. C. 1924. Studies on nematode gametogenesis. Zeit. f. Zell. u. 



Geweb. I. 

 Weinstkin, a. 1918. Coincidence of crossing over in Drosophila melano- 



gaster (ampelophila). Genetics. III. 



1920. Homologous genes and linear linkage in Drosophila virilis. 



Proc. Nat. Acad. Sc. VI. 



1922. Crossing over, non-disjunction, and mutation in Drosophila viri- 



lis. Sigma Xi Quar. X. 

 Weismann, a. 1883. ijber Vererbung. Jena. 



1902. The germ plasm. Trans. 



Wenrich, D. H. 1916. The spermatogenesis of Phrynotettix magnus with 

 special reference to synapsis and the individuality of the chromosomes. 

 Bull. Mus. Comp. Zool. Harv. Coll. LX. 



Wettstein, F. v. 1923. Kreuzungsversuche mit multiploiden Moosrassen. 

 I. Biol. Zentralb. XLIII. 1924. II. Ibid. XLIV. 



1924. Gattungskreuzungen bei Moosen. Zeit. Abst.-Vererb. XXXIII. 



1924. Morphologic und Physiologie des Formwechsels der Moose auf 



genetischer Grundlage. I. Ibid. XXXIII. 



White, O. E, 1916. Inheritance studies in Pisum. I. Inheritance of cotyledon 

 color. Am. Nat. L. 



1917. Studies of inheritance in Pisum. II. The present state of knowl- 

 edge of heredity and variation in peas. Proc. Am. Phil. Soc. LVI. 



1918. Inheritance studies in Pisum. III. The inheritance of height in 



peas. Mem. Torrey Bot. Club. XVII. 



