108 GENETICS [Bot. Absts., Vol. IV, 



662. Lotsy, J. P. [Dutch rev. of: Shamel, A. D. Why navel oranges are seedless. Jour. 

 Heredity 9:247-2-19. 2 fig. 1918.] Genet ica 2: 83-S4. Jan., 1920. 



663. Lotsy, J. P. [Dutch rev. of: Tjbbbbs, K. Sur les Rapports genetiques entre Thau- 

 malea picta et Thaumalea obscura Schlegel. (On the genetical agreement between Thaumalea 

 picta and Thaumalea obscura Schlegel.) Arch. Neerland. Sci. 3:316-323. 1917.] Genetica 

 2:87-88. Jan., 1920. 



661. Lotsy, J. P. De Oenotheren als kernchimeren. [The Oenotheras as nuclear chi- 

 meras.] Genetica 1:7-69. 1919. 



665. Lotsy, J. P. Cucurbita-Strijdvragen. De soortquaestie. Het gedrag na kruising. 

 Parthenogenese? [Controversial questions concerning Cucurbita. The species question. 

 The behavior after crossing. Parthenogenesis?] Genetica 1: 497-531. Nov., 1919. 



666. Lohlein, M. Die Begriffe "Konstitution" und "Disposition." [The concepts "con- 

 stitution" and "disposition."] Mediz. Klinik. 1918. \ 



667. Luxd, David. Uber die Ursachen der JugendasozialitSt. Kriminalpsychologische 

 und soziale Untersuchungen mit Einschluss von Familienforschungen in Schweden. [On the 

 causes of youthful delinquency. Criminal-psychological and social investigations with inclusion 

 of family-studies in Sweden.] 16 X 25 cm., iv + 858 p., 21 fig., 1 general table. Inaugural- 

 Dissertation. Upsala, 1918. — Author has made'it his principal object to study the causal im- 

 portance of heredity and environment as influencing the criminality of youth. His principal 

 material consisted of boys sentenced to forced education at a Swedish establishment Hall. 

 Anthropometrical measurements show the delinquent youths often to be of very mixed race. 

 For instance 33.7 per cent are brachycephalous and 9.7 per cent brown-eyed, whereas the num- 

 bers for the whole population of Sweden are 13.0 and 4.5 per cent respectively. A minute 

 account is given of the ascendence, surroundings, physical and psychical state of a great many 

 individuals. It appears from these family inquiries that the delinquency must be to very great 

 measure hereditarily founded, although the surroundings may of course also play a great part. 

 The number of imbecile and psychopathic individuals is many times larger among boys, 

 grouped on basis of heredity, than among those whose delinquency is attributable to environ- 

 ment. The comprehensive memoir finished with a chapter on future policy of treatment of 

 criminality with reference especially to that of youth. The author lays stress among other 

 things on the necessity of prophylactic measures against the propagation of hereditarily 

 burdened individuals. The investigation shows that the number of children is smaller in 

 the families where anomalies of one kind or another are comparatively rare, than in those 

 where the frequency of inferiorities is greater. — K. V. Ossian Dahlgren. 



668. Ltjxdborg, H. Rasbiologiens stallning som medicinskt vetenskapligt fack och dess 

 betydelse for kulturen i allmanhet. [The place of racial biology as a discipline of scientific 

 medicine and its importance for culture in general.] Hygienisk Revy Lund 1918: 48-50. April 

 15, 1918. — Author insists upon the founding in Sweden of a state institute of racial biology. — 

 K. V. Ossian Dahlgren. 



669. Macfarlane, J. M. The causes and course of evolution. S75 p. Macmillan Co.: 

 . York, 1918. 



670. Mackie, D. B. Notes on a navel variety of the Satsuma orange. California Citro- 

 graph 4: 20-21. Nov., 1918.— Writer repeatedly observed navel marking on Satsuma fruits in 

 .1 -i. n, and obtained a summary of a Japanese paper by A. Kikughi, entitled The appearance 

 of the navel mark on the Satsuma orange. — According to Kikuchi the navel mark is small, 

 affects only the rind, and appears on only part of the fruits on a tree. A statistical study 

 of fruits indicates that navel fruits are larger, heavier, and more oblate than normal fruits 

 from the same tree. [See Bot. Absts. 2, Entry 55.] — H. B. Frost. 



