No. 3, December, 1920] GENETICS 151 



105!). Anonymous. [G i rev. of : Z add, A. Der Hafer. Eine Monographic auf wis- 



senschaftlicher und praktischer Grundlage. (Oats. A monograph on scientific and practical 

 principles.) 8vo., 355 p., 32 fin. Fischer: Jena, 1918. (See Bot. Absts. 2, Entry 467.)] Zeit- 

 schr. Pflanzenzucht. 6: 107. June, 191^. 



1060. Arms r, Ludwio. Messbare phaenotypische und genotypische Instinktver- 



anderungen. Bienen und Wespengehirne, neu verglichen und als Mass benutzt in Fragen der 

 Stammes- und Staatengeschichte sowie Vererbung und Genogenese. Nebst anhang uber 

 Nomada. [Measurable phenotypic and genorypic changes of instinct. Bee and wasp brains 

 compared anew and used as a measure in questions of race and state history, as well as heredity 

 and genogenesis, with an appendix concerning Nomada.] Arch. Bicnenkunde 1: 1—10. 5 pi. 

 8 fig. 1919. 



10(31. Bartos, \Y. Der Einfluss der Veredlung auf den Wert der Rube. [The influence of 

 breeding on the value of the beet.j Zeitschr. Zuckerind. BGhmcn 42: 299-302. 191S. [Anony- 

 mous German rev. in: Zeitschr. Pflanzenzucht. 6: 98. June, 1918. 



1062. Becker, J. Vererbung gewisser Bliitenmerkmale bei Papaver Rhoeas. [Inheritance 

 of certain floral characters in Papaver Rhoeas.] Zeitschr. Pflanzenzucht. 6: 215-221. 3 fig. 

 1918. — Author presents observations on markings at base of petals in case of 40,000 corn pop- 

 pies. Best developed marking consists of two parts, an inner black fleck usually elongated 

 radially (designated by +s) which is capped toward outside by wide white spot (4-w). Pet- 

 als may occur without markings ( — s — w), with black bar only (4-s — w), with white spot 

 alone ( — s 4-w), or with both markings (4-s 4-w). Possible combinations total 16 since 

 inner pair of petals may be marked independently of outer petals but only nine of the 16 

 actually occur, since 4-s and +w appear in outer petals only when they are also in inner pet- 

 als. 4-s and 4-w may show in inner petals even though lacking in outer. To explain author 

 postulates two inhibiting factors, Hi, acting only on inner petals, and Hi and Hi affecting 

 both inner and outer petals; further, that simplex doses of genes for 4-s and 4-w dominate Hi 

 while duplex combinations are supposed to dominate both Hi and H*. No experimental data 

 bearing on this hypothesis were obtained. In unfavorable environment all markings are 

 reduced or absent. — James P. Kelly. 



1063. Benders, A. M. Het percentage der verwantenhuwelijken. [The frequency of con- 

 sanguineous marriages.] Genetica 2: 51-54. Jan., 1920.— Influence of consanguinity of par- 

 ents upon posterity has always attracted the attention of practical eugenicists, especially in 

 medicine. It is especially desirable to know the true percentage of consanguineous marriages 

 among man. Author has made statistical studies; he classifies the patients of some Dutch 

 institutions of neuropathies according to their religions, into three groups: Protestants, 

 Catholics and Jews. He found among Protestants the percentage of 2.2, Catholics 1.1, 

 Dutch-Jews 8.5 and Portuguese-Jews 25.4, this last number being, because of the small total 

 number, not wholly exact. In the total of inhabitants (30 Protestants : 20 Catholics : 1 Jew) 

 the percentage of consanguineous marriages in Holland may be stated to be 1.9; probably 

 this number may be somewhat too high for two reasons: (1) Out of the great number of mar- 

 riages, the consanguinity of which was unknown and therefore the question in the author's 

 blanks unanswered, far the greater part will be nonconsanguineous, and (2) Between consan- 

 guinity of parents and nervous-diseased posterity there may perhaps be some relation, so that 

 the consanguinity in this material is found in more cases, than between parents of same pos- 

 terities. — M. J. Sirks. 



1064. Blaringhem, L. Couleur et sexe des fleurs. [Color and sex of flowers.] Compt. 

 Rend. Soc. Biol. 83 : 892-893. June, 1920. 



1065. Bolk, L. Hersenen en Cultuur. [Brains and culture.] 63 p., 1 fig. Scheltema en 

 Holkema's Boekhandel: Amsterdam, 1918. — Various examples are discussed by the writer, that 

 characteristics of human embryos and those of the chimpanzee are similar, while in later 



