No. 3, April, 1921] GENETICS 261 



1801. VAN DER Lek. [Dutch rev. of: Tisdale, W. H. A study of the nature and inherit- 

 ance of wilt resistance. Jour. Agric. Res. 11 : 573-603. 3 pi., 8 fig. 1917.] Genetica 2: 478- 

 480. Sept., 1920. 



1802. Lenz, Fritz. Oskar Hertwigs AngriSf gegen den "Darwinismus" und die Ras- 

 senhygiene. [Oskar Hertwig's attack on Darwinism and race hygiene.] Arch. Rass.- u. Gesell- 

 schaftsbiol. 13: 194-203. 1920. 



1803. Lenz. [German rev. of: Fleischer, B. tJher myotonische Dystrophic mit K[ata- 

 rakt. (On myotonic dystrophy with cataract.) Arch. Ophthalmol. 96: 1-43. 1918.] Arch. 

 Rass.- u. Gesellschaftsbiol. 13:208. 1920. 



1804. Lenz. [German rev. of: Schallmayer, W. Vererbung und Auslese. Grundriss 

 der Gesellschaftsbiologie und der Lehre vom Rassedienst. (Heredity and selection. Funda- 

 mentals of social biology and science of race improvement.) Srd ed., 8 vo, xvi + 536 p. Gustav 

 Fischer: Jena, 1918. (See Bot. Absts. 2, Entry 704.)] Zeitschr. Indukt. Abstamm. u. Vererb. 

 24:297-300. Nov., 1920. 



1805. Lenz. [German rev. of: Siegel, P. W. Gewollte und ungewollte Schwankungen 

 der weiblichen Fruchtbarkeit. Bedeutung des Kohabitationstermines fiir die Haufigkeit der 

 Knabengeburten. (Intentional and unintentional variations in female fecundity. Signifi- 

 cance of the time of intercourse for the frequency of male births.) 197 p. J. Springer: Berlin, 

 1917.] Arch. Rass.-u. Gesellschaftsbiol. 13:221-225. 1920. 



1806. Leverenz, C. Die meistgebauten landwirtschaftlichen Pflanzenziichten Deutsch- 

 lands mit Ausnahme der Kartoffeln. (The most frequently cultivated agricultural plant breeds 

 of Germany, with exception of potatoes.] Landwirtschaftskammer Provinz Sachsen. 79 p. 

 Hermann Kuhnt: Halle, 1920.— See Bot. Absts. 7, Entry 1704. 



1807. Levy, Fritz. Die Kernverhaltnisse bei parthenogenetischen Froschen. Ein 

 Beitrag zur Physiologic und Pathologic der Zelle. [The nuclear relations in parthenogenetic 

 frogs. A contribution to the physiology and pathology of the cell.] Sitzungsber. Preuss. Akad. 

 Wiss. Berlin 1920:417-425. 1920. 



1808. Little, C. C. A note on the origin of piebald spotting in dogs. Jour. Heredity 11: 

 12-15. 1 fig. 1920. — -Piebald spotting may be altered in extent by selection within a race 

 showing a minute degree of spotting, but since the factor is hypostatic it will not appear in a 

 self-colored race unless by recombination or mutation. Two cases, a spotted Scottish terrier 

 puppy and spotted puppies in two litters of Airedale terriers, are given with their pedigrees, 

 with an explanation of which of the parents may have been responsible in bringing in the 

 hypostatic factor. — /. H. Beaumont. 



1809. Lotsy, J. P. Over Gallus tcmminckii G. R. Gray en over de eikleur der wilde 

 Hoenderlinneonten. [Gallus tcmminckii G. R. Gray and the egg color of the wild Linncan 

 species of fowl.] Genetica 2: 400-404. 1 fig. Sept., 1920. 



1810. LuBoscH, WiLHELM. Das Problem der ticrischen Gcnealogie. Nebst einer Eror- 

 terung des genealogischen Zusammcnhanges der Steinheimer Schnecken. [The problem of 

 animal genealogy. Also a statement of the genealogical relations of the Steinheim snails.] 

 Arch. Mikrosk. Anat. 94:459-499. 1920. 



1811. LtJHNiNG. Die erbliche Geschlechtsverkniipfung. [Hereditary sex-determina- 

 tion.] Deutsch. Landw. Tierzuchtg. 22 : 77-78. 1918.— Author argues that the sex of off- 

 spring is determined by that of the weaker of the parents as the race would become extinct 

 if the reverse were true. He holds that in general offspring inherit their characteristics largely 

 from the parent of the opposite sex. Inheritance of thick lower lip of the Habsburgs is dis- 

 cussed briefly as illustration.— 5eu;aZZ Wright. 



