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Keue Literatur. 



Lotsy, J.. 1!)14. Prof. E. Lehmann über Art, reine Linie und isogene Ein- 

 heit. BioL CentralbL ;U. S. 4.S4— 496. 



Lotsy, J. P., 1914. De kruisingtheorie, eene nieuwe theorie over het ont- 

 ' staan der soorten (Rede). Leiden, A. W. Sijthoff z. j. 40 S. 



MacDougai, D. T., 1914. The measurement of environie factors and their 

 biologic effects. Pop. Sc. Monthly S4. S. 417—433. 



Marcliaiul, W., 1914. Die Herkunft, der lebenden Wesen. München. 48 S. 8». 



Mast, S. 0., 1914. L. J. Henderson on „The fitness of the Environment". 

 Biol. Centralb. 34. S. 434-440. 



Morpjaii, T. H., 1914. Sex-Umited and sex-Unked inheritance. Amer. Natu- 

 ralist 17. S. 577 — 583. 



Morgan, T. H. and Castle, W\ E., 1914. The theoretical distinction between 

 multiple allelomoqjhs and close linkage (discussion). Amer. Naturalist 48. 

 S. 502—504. 



Mottrani, J. ('.. 1914. Controlled natural selection and value marking. 

 London. 140 S. 8 ". 



Miiller, H. J., 1914. The bearing of the selection experiments of Castle and 

 Philips on the variability of genes. Amer. Naturalist 17. S. 567 — 576. 



Xatliaiisoii. A., 1914. Über die Variabilität in natürlichen Populationen. 

 Verh. 85. Vers. Ges. dtsch. Nat. u. Ärzte. Wien 1913. S. 621 622. 



Natzuier, (J. v.. 1915. Das biogenetische Grundgesetz im Leben des In- 

 sektenstaates. Biol. CentralbL 35. S. 30—36. 



Natznier. 0. v., 1914. Die Entwicklung der sozialen Instinkte bei den 

 staatenbildeuden Insekten. Die Naturwissenschaften II. S. 810 — 818. 



Parker, G. H., 1914. The origin and evolution of the nervous system. 

 Pop. Sc. Monthly, febr. 



Patellani, S., 1914. Gregorio Mendel e Topera sua: „Versuche über Pflanzen- 

 hybriden", „Über einige aus künstlicher Befruchtung gewonnene Hie- 

 raciumbastarde"'. Milano. 52 S. 8 ". 



Pearl, R., 1914. Studies on inbreeding IV. On a general formula for the 

 constitution of the nil' generation of a Mendelian population . . . Amer. 

 Naturalist 4S. S. 491—494. 



Pearl, R., 1914. Studies on inbreeding V. Inbreeding and relationship 

 coefficients. Amer. Naturalist 4S. S. 513—523. 



Pearson, K., 1914. On the probability that two independant distributions of 

 frequency are really samples of the same population, with special 

 reference to recent work on the identity of Trypanosome series. Bio- 

 metrica 10. S. 85—143. 15 diagr. 



Pearson, K., 1914. Note on the essential conditions that a population breed- 

 ing at random should be in a stable state. Biometrica 10. S. 175 

 bis 179. 



Pearson, K., 1914. On certain errors with regard to multiple correlation 

 occasionally made by those who have not adequately studied the 

 subject. Biometrica 10. S. 181—187. 



Pester, P. J., 1914. The determination of sex. Journ. Heredity 5. S. 207 

 bis 20S. 



Popenoe, P., 1914. Origin of the date-palm. Journ. Heredity ."i. S. 498 — 508. 



