No. 1, August, 1920] GENETICS 65 



470. Urban, J. Hochpolarisierende Rube und ihre Nachkommenschaft. [High-po'ar- 

 izing beets and their progeny.) Zeitschr. Zucker Endustr. BShmen 42: 387 391. 1919. Bee 

 Bot. Abats. 5, Entry 312. 



477. Vaerting, M. Die verschiedene Intensitat der pathologischen Erblichkeit in ihrer 

 Bedeutung fiir die Kriegsdegeneration. [Different intensity of pathological inheritance and its 

 significance for war degenerations.] Der Fraucnarzt. 191N. 



ITS. v.\x der Wolk, P. C. [German rev. of: van deb Wolk, P. C. Onderzoekingen 

 over blyvende modificaties en hun betrekking tot mutaties. (Researches on permanent modifi- 

 cations and their relations to mutations.) Cultura 31: 82-105. 1 pi. 1019. (See Bot. Absts. 

 3, Entry 296.)] Zeitschr. Pflanzenziicht. 7: 142-144. Dec, 1919. 



479. Vernet, G. Biometrie et homogeneite. [Biometry and homogeneity.] Bull. Agric. 

 Inst. Sci. Saigon 2: 15-26. 1920. 



480. Vieillard, P. Note sur la selection des riz par la constitution de lignees pures et 

 sur les hybridations des riz. [Note on the selection of rice by establishment of pure lines and 

 on the hybridization of rice.] Bull. Agric. Inst. Sci. Saigon 2: 11-15. 1920. 



481. Vogt, A. Vererbung in der Augenheilkunde. [Heredity in ophthalmology.] Miinche- 

 ner Med. Wochenschr. 66:1-5. 1919. 



482. Volkart, A. 40. und 41. Jahresbericht. Schweizerische Samenuntersuchungs- 

 und Versuchsanstalt in Oelikon-Ztirich. [40th and 41st annual report. Swiss seed-control 

 and experiment station in Oerlikon-Zurich.j Landw. Jahrb. Schweiz. 1919: 1-40. 1919.— St < 

 Bot. Absts. 5, Entry 313.] 



483. von Bubnoff, Serge. Uber einige grundlegende Prinzipien der palaontologischen 

 Systematik. [Some fundamental principles of paleontological taxonomy.] Zeitschr. indukt. 

 Abstamm. Vererb. 21: 158-168. Sept., 1919.— Wedekind was followed in his application of 

 the statistical rules of variation to paleontological material. Two very common Triassic 

 ammonites from one locality were studied in hundreds of specimens. A form had been separ- 

 ated from each and named as a species on account of a single and doubtful difference. When 

 the variates were seriated, the supposed separate forms gave in each case a single typical varia- 

 tion curve along with the species. This shows that the difference in question was not suffi- 

 cient to distinguish species, or even varieties; and races, or "elementary species," cannot be 

 dealt with in paleontology. — A correlation between two or more characteristics was obtained 

 by comparing different stages of growth, or by comparing closely allied species. Character- 

 istics which are correlated in this fashion should vary together if the variation is genetic. 

 They did not vary together in a trial of individuals of the same species. Hence this correla- 

 tion is a test of specific difference. — John Belling. 



484. von Caron-Eldingen. Physiologische Spaltungen ohne Mendelismus. [Physio- 

 logical segregation without Mendelism.] Deutsch. Landw. Presse 1919: 515-516. 1919.— Sec 

 Bot, Absts. 5, Entry 314.1 



485. von Caron-Eldingen. Mutationen und Doppelkdrner. [Mutations and double 

 grains.] Deutsch. Landw. Presse 45: 618. S Jig. 191S. 



486. von Caron-Eldingen. Physiologische Spaltungen oder vegetative Mutation (Mein- 

 ungsaustausch). [Physiological splitting or vegetative mutations.] Deutsch. Landw. Presse 

 46:56. 1919. 



487. von Graevenitz, Luise. Ein merkwurdiges Resultat bei Inzuchtsversuchen. [A 

 remarkable result in an inbreeding experiment.] Zeitschr. indukt. Abstamm. Vererb. 21: 

 169-173. Sept., 1919.— Effects of four different types of pollination compared on the off- 



BOTANICAL ABSTRACTS, VOL. T, NO. 1 



