No. 4, January, 1921] GENETICS 259 



1766. Stehlik, W. Bekampfung des Wurzelbrandes bei der Zuckerrube durch ihre 

 Ziichtung. [Control of sugar beet rootrot by breeding.] Ost-Ung. Zeitschr. Zuckerind. u. 

 Landw. 47: 1-10. 1918. 



1767. Steinach, Eugen, and Paul Kammerer. Klima und Mannbarkeit. [Climate and 

 sexual maturity.] Anz. Akad. Wiss. Wien 56: 252-257. 1919. 



176S. Steinach, E., and P. Kammerer. Klima und Mannbarkeit. [Climate and sexual 

 maturity.] Archiv Entwicklungsmcch. 46: 391-458. 2 fig. 1920. 



1769. Steinach, E. Verjungung durch experimentelle Neubelebung der alternden 

 pubertatsdriise. [Rejuvenation through experimental revitalization of the senile sex glands.] 

 Archiv Entwicklungsmcch. Org. 46:557-619. 9 pi., 7 fig. July, 1920. 



1770. Stork, Harvey, E. Studies in the genus Taraxacum. Bull. Torrey Bot. Club 47: 

 199-210. May, 1920. — Taraxacum confertum and T. platycarpum are sexual forms with a dip- 

 loid chromosome number of 16. T. vulgare, T. erythrospermum, and T. albidum are ooapoga- 

 mous forms with about twice as many chromosomes as the sexual forms. Considerable varia- 

 bility is found in the ooapogamous forms. — Karl Sax. 



1771. Strasser, Hans. Fragen der Entwicklungsmechanik. Die Vererbung erworbener 

 Eigenschaften. [Questions of developmental mechanics. Inheritance of acquired characters.] 

 158 p. Ernst Bircher: Bern and Leipzig. 1920. 



1772. Stuart, C. P. Cohen. Die Ziichtung der Teepflanze. [Breeding of the tea plant.] 

 Zeitschr. Pflanzenziicht. 7: 157-204. 8 fig. June, 1920. 



1773. Study, E. Eine lamarckistische Kritik des Darwinismus. [A Lamarckistic cri- 

 tique of Darwinism.] Zeitschr. indukt. Abstamm. Vererb. 24: 33-70. Aug., 1920. 



1774. Svestka, Vladislav. Eine seltene Haarbes chaff enheit (hellfarbig, stark gekrau- 

 selt) in Bohmen. [A rare hair character (light colored, strongly crinkled).] Ceska dermatol. 

 Jg. 1 : 171-174. 1920. — Describes a 12-year-old girl from region of Pilsen, studied at the clinic 

 for skin-diseases at the Technical University at Prag. Hair of propositus was 5-6 cm. long of 

 color No. 25 of E. Fischer's color table, and crinkled as in typical negro hair. No known negro 

 elements occur in the ancestry, and no other negroid characters are observable in the proposi- 

 tus. Hair is of typical oval form in cross-section and visibly deficient in pigmentation. 

 Eye-color is dark blue. Author raises question whether this abnormality accords with 

 Grimaldi's theory of the introduction of negro elements to Europe at the time of the Flood. 

 [From abstract by Matouschek in Bericht. u. d. gesamt. Physiol. 2: 22. Aug., 1920.] — G. H. 

 Shull. 



1775. Tayler, Noel. A case of hermaphroditism in a lizard, Lacerta viridis. Proc. 

 Zool. Soc. London 1918:223-230. 8 fig. Mar., 1919.— The hermaphrodite possessed a com- 

 plete male reproductive system and, in addition, (1) "spherical ovarian appendages" attached 

 to the dorso-lateral border of the testes by well-defined stalks, and (2) oviducts "developed 

 for about a third of their lengths," each having a well developed funnel. Sectioned testicular 

 tissue was normal. Sections through the stalked outgrowths showed ovarian tissue with 

 many large ova and smaller ova, the youngest being in the stalks near the testes. Sections 

 through kidneys revealed in one kidney an embedded mass of almost fully grown ova. Author 

 figures general arrangement of reproductive system; a section of ovarian tissue; and a section 

 of kidney, showing contained mass of ova. — A. M. Banta. 



1776. Tedin, Hans. The inheritance of flower colour in Pisum. Hereditas 1:68-97. 

 1 colored pi., 2 fig. 1920. — Purple color is conditioned by three factors. The presumptive 

 factor for rose adopted from previous investigations is not a simple factor, but is composed 

 of two factors. One of these, A, gives light purple, and this one is also the real fundamental 



